我有UITextView，显示NSAttributedString。 textView的editable和selectable属性都设置为false。
attributionString包含一个URL，我想允许点击URL来打开浏览器。但只有在selectable属性设置为true时才能与URL进行互动。
如何仅允许用户互动来点击链接，而不是选择文字？
答案 0 :(得分：55)
我发现摆弄内部手势识别器的概念有点可怕，所以试图寻找另一种解决方案。
我发现我们可以覆盖// Inside a UITextView subclass:
override func point(inside point: CGPoint, with event: UIEvent?) -> Bool {
guard let pos = closestPosition(to: point) else { return false }
guard let range = tokenizer.rangeEnclosingPosition(pos, with: .character, inDirection: .layout(.left)) else { return false }
let startIndex = offset(from: beginningOfDocument, to: range.start)
return attributedText.attribute(.link, at: startIndex, effectiveRange: nil) != nil
}
以有效地允许＆＃34;点击＆＃34;当用户没有触及内部有链接的文本时：
UITextView这也意味着如果UITableViewCell内有tableView(didSelectRowAt:)内的链接，则在点击文字的非链接部分时仍会调用 <input type="checkbox" id="perlengkapans1" name="perlengkapans" data-stok="1" value="name item 1" />
<input type="checkbox" id="perlengkapans2" name="perlengkapans" data-stok="4" value="name item 2" />
<input type="checkbox" id="perlengkapans3" name="perlengkapans" data-stok="0" value="name item 3" />
答案 1 :(得分：9)
正如Cœur所说，你可以继承UITextView覆盖selectedTextRange的方法，将其设置为 nil 。并且链接仍然是可点击的，但您将无法选择其余文本。
class CustomTextView: UITextView {
override public var selectedTextRange: UITextRange? {
get {
return nil
}
set { }
}
答案 2 :(得分：5)
经过一些研究，我已经找到了解决方案。这是一个黑客攻击，我不知道它是否会在未来的iOS版本中运行，但它现在正在运行（iOS 9.3）。
只需添加此UITextView类别（Gist here）：
@implementation UITextView (NoFirstResponder)
- (void)addGestureRecognizer:(UIGestureRecognizer *)gestureRecognizer {
if ([gestureRecognizer isKindOfClass:[UILongPressGestureRecognizer class]]) {
@try {
id targetAndAction = ((NSMutableArray *)[gestureRecognizer valueForKey:@"_targets"]).firstObject;
NSArray <NSString *>*actions = @[@"action=loupeGesture:", // link: no, selection: shows circle loupe and blue selectors for a second
@"action=longDelayRecognizer:", // link: no, selection: no
/*@"action=smallDelayRecognizer:", // link: yes (no long press), selection: no*/
@"action=oneFingerForcePan:", // link: no, selection: shows rectangular loupe for a second, no blue selectors
@"action=_handleRevealGesture:"]; // link: no, selection: no
for (NSString *action in actions) {
if ([[targetAndAction description] containsString:action]) {
[gestureRecognizer setEnabled:false];
}
}
}
@catch (NSException *e) {
}
@finally {
[super addGestureRecognizer: gestureRecognizer];
}
}
}
答案 3 :(得分：4)
仅可点击链接而不进行选择的解决方案。
UITextView可以处理手势，因此只能使其可点击。根据{{3}} class UnselectableTappableTextView: UITextView {
// required to prevent blue background selection from any situation
override var selectedTextRange: UITextRange? {
get { return nil }
set {}
}
override func gestureRecognizerShouldBegin(_ gestureRecognizer: UIGestureRecognizer) -> Bool {
if let tapGestureRecognizer = gestureRecognizer as? UITapGestureRecognizer,
tapGestureRecognizer.numberOfTapsRequired == 1 {
// required for compatibility with links
return super.gestureRecognizerShouldBegin(gestureRecognizer)
}
return false
}
}
delegate以从 3D Touch 禁用.preview。从Cœur class ViewController: UIViewController, UITextViewDelegate {
@IBOutlet var textView: UITextView!
override func viewDidLoad() {
//...
textView.delegate = self
}
func textView(_ textView: UITextView, shouldInteractWith URL: URL, in characterRange: NSRange, interaction: UITextItemInteraction) -> Bool {
UIApplication.shared.open(URL)
// Disable `.preview` by 3D Touch and other interactions
return false
}
}
如果您只想使用UITextView来嵌入链接而无需滚动手势，这可能是一个很好的解决方案。
答案 4 :(得分：3)
您可以通过继承UITextView并禁止可以选择内容的手势来禁用文本选择。
以下解决方案是：
/// Class to allow links but no selection.
/// Basically, it disables unwanted UIGestureRecognizer from UITextView.
/// https://stackoverflow.com/a/49443814/1033581
class UnselectableTappableTextView: UITextView {
// required to prevent blue background selection from any situation
override var selectedTextRange: UITextRange? {
get { return nil }
set {}
}
override func gestureRecognizerShouldBegin(_ gestureRecognizer: UIGestureRecognizer) -> Bool {
if gestureRecognizer is UIPanGestureRecognizer {
// required for compatibility with isScrollEnabled
return super.gestureRecognizerShouldBegin(gestureRecognizer)
}
if let tapGestureRecognizer = gestureRecognizer as? UITapGestureRecognizer,
tapGestureRecognizer.numberOfTapsRequired == 1 {
// required for compatibility with links
return super.gestureRecognizerShouldBegin(gestureRecognizer)
}
// allowing smallDelayRecognizer for links
// https://stackoverflow.com/questions/46143868/xcode-9-uitextview-links-no-longer-clickable
if let longPressGestureRecognizer = gestureRecognizer as? UILongPressGestureRecognizer,
// comparison value is used to distinguish between 0.12 (smallDelayRecognizer) and 0.5 (textSelectionForce and textLoupe)
longPressGestureRecognizer.minimumPressDuration < 0.325 {
return super.gestureRecognizerShouldBegin(gestureRecognizer)
}
// preventing selection from loupe/magnifier (_UITextSelectionForceGesture), multi tap, tap and a half, etc.
gestureRecognizer.isEnabled = false
return false
}
}
原生UITextView链接手势识别器在iOS 11.0-11.1中被破坏，需要小延迟长按而不是点击：Xcode 9 UITextView links no longer clickable
您可以使用自己的手势识别器正确支持链接，并且可以通过继承UITextView并禁止可以选择内容或点按某些内容的手势来禁用文本选择。
以下解决方案将禁止选择，并且是：
/// Class to support links and to disallow selection.
/// It disables most UIGestureRecognizer from UITextView and adds a UITapGestureRecognizer.
/// https://stackoverflow.com/a/49443814/1033581
class UnselectableTappableTextView: UITextView {
required init?(coder aDecoder: NSCoder) {
super.init(coder: aDecoder)
// Native UITextView links gesture recognizers are broken on iOS 11.0-11.1:
// https://stackoverflow.com/questions/46143868/xcode-9-uitextview-links-no-longer-clickable
// So we add our own UITapGestureRecognizer.
linkGestureRecognizer = UITapGestureRecognizer(target: self, action: #selector(textTapped))
linkGestureRecognizer.numberOfTapsRequired = 1
addGestureRecognizer(linkGestureRecognizer)
linkGestureRecognizer.isEnabled = true
}
var linkGestureRecognizer: UITapGestureRecognizer!
// required to prevent blue background selection from any situation
override var selectedTextRange: UITextRange? {
get { return nil }
set {}
}
override func addGestureRecognizer(_ gestureRecognizer: UIGestureRecognizer) {
// Prevents drag and drop gestures,
// but also prevents a crash with links on iOS 11.0 and 11.1.
// https://stackoverflow.com/a/49535011/1033581
gestureRecognizer.isEnabled = false
super.addGestureRecognizer(gestureRecognizer)
}
override func gestureRecognizerShouldBegin(_ gestureRecognizer: UIGestureRecognizer) -> Bool {
if gestureRecognizer == linkGestureRecognizer {
// Supporting links correctly.
return super.gestureRecognizerShouldBegin(gestureRecognizer)
}
if gestureRecognizer is UIPanGestureRecognizer {
// Compatibility support with isScrollEnabled.
return super.gestureRecognizerShouldBegin(gestureRecognizer)
}
// Preventing selection gestures and disabling broken links support.
gestureRecognizer.isEnabled = false
return false
}
@objc func textTapped(recognizer: UITapGestureRecognizer) {
guard recognizer == linkGestureRecognizer else {
return
}
var location = recognizer.location(in: self)
location.x -= textContainerInset.left
location.y -= textContainerInset.top
let characterIndex = layoutManager.characterIndex(for: location, in: textContainer, fractionOfDistanceBetweenInsertionPoints: nil)
let characterRange = NSRange(location: characterIndex, length: 1)
if let attachment = attributedText?.attribute(.attachment, at: index, effectiveRange: nil) as? NSTextAttachment {
if #available(iOS 10.0, *) {
_ = delegate?.textView?(self, shouldInteractWith: attachment, in: characterRange, interaction: .invokeDefaultAction)
} else {
_ = delegate?.textView?(self, shouldInteractWith: attachment, in: characterRange)
}
}
if let url = attributedText?.attribute(.link, at: index, effectiveRange: nil) as? URL {
if #available(iOS 10.0, *) {
_ = delegate?.textView?(self, shouldInteractWith: url, in: characterRange, interaction: .invokeDefaultAction)
} else {
_ = delegate?.textView?(self, shouldInteractWith: url, in: characterRange)
}
}
}
}
答案 5 :(得分：1)
通过@Lukas
获取上述Objective-C版本extension UITextView {
override open func addGestureRecognizer(_ gestureRecognizer: UIGestureRecognizer) {
if gestureRecognizer.isKind(of: UILongPressGestureRecognizer.self) {
do {
let array = try gestureRecognizer.value(forKey: "_targets") as! NSMutableArray
let targetAndAction = array.firstObject
let actions = ["action=oneFingerForcePan:",
"action=_handleRevealGesture:",
"action=loupeGesture:",
"action=longDelayRecognizer:"]
for action in actions {
print("targetAndAction.debugDescription: \(targetAndAction.debugDescription)")
if targetAndAction.debugDescription.contains(action) {
gestureRecognizer.isEnabled = false
}
}
} catch let exception {
print("TXT_VIEW EXCEPTION : \(exception)")
}
defer {
super.addGestureRecognizer(gestureRecognizer)
}
}
}
}
答案 6 :(得分：1)
以下是Max Chuquimia发布的答案的Objective C版本。
- (BOOL) pointInside:(CGPoint)point withEvent:(UIEvent *)event
{
UITextPosition *position = [self closestPositionToPoint:point];
if (!position) {
return NO;
}
UITextRange *range = [self.tokenizer rangeEnclosingPosition:position
withGranularity:UITextGranularityCharacter
inDirection:UITextLayoutDirectionLeft];
if (!range) {
return NO;
}
NSInteger startIndex = [self offsetFromPosition:self.beginningOfDocument
toPosition:range.start];
return [self.attributedText attribute:NSLinkAttributeName
atIndex:startIndex
effectiveRange:nil] != nil;
}
答案 7 :(得分：1)
这对我有用：
@interface MessageTextView : UITextView <UITextViewDelegate>
@end
@implementation MessageTextView
-(void)awakeFromNib{
[super awakeFromNib];
self.delegate = self;
}
- (BOOL)canBecomeFirstResponder {
return NO;
}
- (void)textViewDidChangeSelection:(UITextView *)textView
{
textView.selectedTextRange = nil;
[textView endEditing:YES];
}
@end
答案 8 :(得分：0)
SWIFT 5
以下是对我有用的不同答案和评论的组合：
UITextView 的子类：
class DescriptionAndLinkTextView: UITextView {
// MARK: - Initialization
required init?(coder: NSCoder) {
super.init(coder: coder)
dataDetectorTypes = .all
backgroundColor = .clear
isSelectable = true
isEditable = false
isScrollEnabled = false
contentInset = .zero
textContainerInset = UIEdgeInsets.zero
textContainer.lineFragmentPadding = 0
linkTextAttributes = [.foregroundColor: UIColor.red,
.font: UIFont.systemFontSize,
.underlineStyle: 0,
.underlineColor: UIColor.clear]
}
override func point(inside point: CGPoint, with event: UIEvent?) -> Bool {
guard super.point(inside: point, with: event) else { return false }
guard let pos = closestPosition(to: point) else { return false }
guard let range = tokenizer.rangeEnclosingPosition(pos, with: .character, inDirection: .layout(.left)) else { return false }
let startIndex = offset(from: beginningOfDocument, to: range.start)
guard startIndex < self.attributedText.length - 1 else { return false } // to handle the case where the text ends with a link and the user taps in the space after the link.
return attributedText.attribute(.link, at: startIndex, effectiveRange: nil) != nil
}
}
如何使用它（在这种情况下，在一个tableview单元格中）：
class MyTableViewCell: UITableViewCell {
// MARK: - IBOutlets
@IBOutlet weak var infoTextView: DescriptionAndLinkTextView! {
didSet {
infoTextView.delegate = self
}
}
// MARK: - Lifecycle
override func awakeFromNib() {
super.awakeFromNib()
selectionStyle = .none
}
}
// MARK: - UITextViewDelegate
extension MyTableViewCell: UITextViewDelegate {
func textView(_ textView: UITextView, shouldInteractWith URL: URL, in characterRange: NSRange, interaction: UITextItemInteraction) -> Bool {
DispatchQueue.main.async {
UIApplication.shared.open(URL)
}
// Returning false, to prevent long-press-preview.
return false
}
func textViewDidChangeSelection(_ textView: UITextView) {
if (textView == infoTextView && textView.selectedTextRange != nil) {
// `selectable` is required for tappable links but we do not want
// regular text selection, so clear the selection immediately.
textView.delegate = nil // Disable delegate while we update the selectedTextRange otherwise this method will get called again, circularly, on some architectures (e.g. iPhone7 sim)
textView.selectedTextRange = nil // clear selection, will happen before copy/paste/etc GUI renders
textView.delegate = self // Re-enable delegate
}
}
}
答案 9 :(得分：0)
请尝试：
func textViewDidChangeSelection(_ textView: UITextView) {
textView.selectedTextRange = nil
}
答案 10 :(得分：0)
启用可选以使链接检测有效，然后只需取消选择检测到的第二个选择，它将在UI有机会更新之前起作用。
yourTextView.selectable = YES;
yourTextView.delegate = self;
-(void)textViewDidChangeSelection:(UITextView *)textView {
if (textView == yourTextView) {//selectable is required for clickable links, just unselect if they select
textView.selectedRange = NSMakeRange(0, 0);
}
}
答案 11 :(得分：0)
@Max Chuquimia的答案将解决问题。但是双击仍会显示textView的选项菜单。只需将以下代码添加到您的自定义视图中即可。
override func canPerformAction(_ action: Selector, withSender sender: (Any)?) -> Bool {
UIMenuController.shared.hideMenu()
//do not display the menu
self.resignFirstResponder()
//do not allow the user to selected anything
return false
}
答案 12 :(得分：0)
一个丑陋但好吃的东西。
private class LinkTextView: UITextView {
override func selectionRects(for range: UITextRange) -> [UITextSelectionRect] {
[]
}
override func caretRect(for position: UITextPosition) -> CGRect {
CGRect.zero.offsetBy(dx: .greatestFiniteMagnitude, dy: .greatestFiniteMagnitude)
}
}
在禁用滚动的文本视图中进行了测试。
答案 13 :(得分：0)
我最终结合了https://stackoverflow.com/a/44878203/2015332和https://stackoverflow.com/a/49443814/2015332的解决方案（iOS <11变体）。这可以按预期工作：只读，不可选择的UITextView，其上的超链接仍在起作用。 Coeur解决方案的优点之一是触摸检测是即时的，不会显示突出显示，也不会拖放链接。
这是结果代码：
class HyperlinkEnabledReadOnlyTextView: UITextView {
override init(frame: CGRect, textContainer: NSTextContainer?) {
super.init(frame: frame, textContainer: textContainer)
isEditable = false
isSelectable = false
initHyperLinkDetection()
}
required init?(coder aDecoder: NSCoder) {
super.init(coder: aDecoder)
isEditable = false
isSelectable = false
initHyperLinkDetection()
}
// MARK: - Prevent interaction except on hyperlinks
// Combining https://stackoverflow.com/a/44878203/2015332 and https://stackoverflow.com/a/49443814/1033581
private var linkGestureRecognizer: UITapGestureRecognizer!
private func initHyperLinkDetection() {
// Native UITextView links gesture recognizers are broken on iOS 11.0-11.1:
// https://stackoverflow.com/questions/46143868/xcode-9-uitextview-links-no-longer-clickable
// So we add our own UITapGestureRecognizer, which moreover detects taps faster than native one
linkGestureRecognizer = UITapGestureRecognizer(target: self, action: #selector(textTapped))
linkGestureRecognizer.numberOfTapsRequired = 1
addGestureRecognizer(linkGestureRecognizer)
linkGestureRecognizer.isEnabled = true // because previous call sets it to false
}
override func addGestureRecognizer(_ gestureRecognizer: UIGestureRecognizer) {
// Prevents drag and drop gestures, but also prevents a crash with links on iOS 11.0 and 11.1.
// https://stackoverflow.com/a/49535011/1033581
gestureRecognizer.isEnabled = false
super.addGestureRecognizer(gestureRecognizer)
}
override func point(inside point: CGPoint, with event: UIEvent?) -> Bool {
// Allow only taps located over an hyperlink
var location = point
location.x -= textContainerInset.left
location.y -= textContainerInset.top
guard location.x >= bounds.minX, location.x <= bounds.maxX, location.y >= bounds.minY, location.y <= bounds.maxY else { return false }
let charIndex = layoutManager.characterIndex(for: location, in: textContainer, fractionOfDistanceBetweenInsertionPoints: nil)
return attributedText.attribute(.link, at: charIndex, effectiveRange: nil) != nil
}
@objc private func textTapped(recognizer: UITapGestureRecognizer) {
guard recognizer == linkGestureRecognizer else { return }
var location = recognizer.location(in: self)
location.x -= textContainerInset.left
location.y -= textContainerInset.top
guard location.x >= bounds.minX, location.x <= bounds.maxX, location.y >= bounds.minY, location.y <= bounds.maxY else { return }
let characterIndex = layoutManager.characterIndex(for: location, in: textContainer, fractionOfDistanceBetweenInsertionPoints: nil)
let characterRange = NSRange(location: characterIndex, length: 1)
if let attachment = attributedText?.attribute(.attachment, at: index, effectiveRange: nil) as? NSTextAttachment {
if #available(iOS 10.0, *) {
_ = delegate?.textView?(self, shouldInteractWith: attachment, in: characterRange, interaction: .invokeDefaultAction)
} else {
_ = delegate?.textView?(self, shouldInteractWith: attachment, in: characterRange)
}
}
if let url = attributedText?.attribute(.link, at: characterIndex, effectiveRange: nil) as? URL {
if #available(iOS 10.0, *) {
_ = delegate?.textView?(self, shouldInteractWith: url, in: characterRange, interaction: .invokeDefaultAction)
} else {
_ = delegate?.textView?(self, shouldInteractWith: url, in: characterRange)
}
}
}
}
请不要在编译.attachment枚举大小写时遇到麻烦，我将其删除是因为我没有使用它。
答案 14 :(得分：0)
Swift 4.2
简单
class MyTextView: UITextView {
override func point(inside point: CGPoint, with event: UIEvent?) -> Bool {
guard let pos = closestPosition(to: point) else { return false }
guard let range = tokenizer.rangeEnclosingPosition(pos, with: .character, inDirection: UITextDirection(rawValue: UITextLayoutDirection.left.rawValue)) else { return false }
let startIndex = offset(from: beginningOfDocument, to: range.start)
return attributedText.attribute(NSAttributedString.Key.link, at: startIndex, effectiveRange: nil) != nil
}
}
答案 15 :(得分：0)
这是一个Swift 4解决方案，它允许水龙头通过水槽，但按下链接时除外。
在父视图中
private(set) lazy var textView = YourCustomTextView()
func setupView() {
textView.isScrollEnabled = false
textView.isUserInteractionEnabled = false
let tapGr = UITapGestureRecognizer(target: textView, action: nil)
tapGr.delegate = textView
addGestureRecognizer(tapGr)
textView.translatesAutoresizingMaskIntoConstraints = false
addSubview(textView)
NSLayoutConstraint.activate(textView.edges(to: self))
}
自定义UITextView
class YourCustomTextView: UITextView, UIGestureRecognizerDelegate {
var onLinkTapped: (URL) -> Void = { print($0) }
override func gestureRecognizerShouldBegin(_ gestureRecognizer: UIGestureRecognizer) -> Bool {
guard let gesture = gestureRecognizer as? UITapGestureRecognizer else {
return true
}
let location = gesture.location(in: self)
guard let closest = closestPosition(to: location), let startPosition = position(from: closest, offset: -1), let endPosition = position(from: closest, offset: 1) else {
return false
}
guard let textRange = textRange(from: startPosition, to: endPosition) else {
return false
}
let startOffset = offset(from: beginningOfDocument, to: textRange.start)
let endOffset = offset(from: beginningOfDocument, to: textRange.end)
let range = NSRange(location: startOffset, length: endOffset - startOffset)
guard range.location != NSNotFound, range.length != 0 else {
return false
}
guard let linkAttribute = attributedText.attributedSubstring(from: range).attribute(.link, at: 0, effectiveRange: nil) else {
return false
}
guard let linkString = linkAttribute as? String, let url = URL(string: linkString) else {
return false
}
guard delegate?.textView?(self, shouldInteractWith: url, in: range, interaction: .invokeDefaultAction) ?? true else {
return false
}
onLinkTapped(url)
return true
}
}
答案 16 :(得分：0)
我为目标C所做的是创建一个子类并覆盖textViewdidChangeSelection：委托方法，因此在实现类中：
#import "CustomTextView.h"
@interface CustomTextView()<UITextViewDelegate>
@end
@implementation CustomTextView
。 。 。 。 。 。
- (void) textViewDidChangeSelection:(UITextView *)textView
{
UITextRange *selectedRange = [textView selectedTextRange];
NSString *selectedText = [textView textInRange:selectedRange];
if (selectedText.length > 1 && selectedText.length < textView.text.length)
{
textView.selectedRange = NSMakeRange(0, 0);
}
}
别忘了设置self.delegate = self
答案 17 :(得分：0)
这是我解决此问题的方法-我将可选的textview设为重写canPerformAction的子类以返回false。
class CustomTextView: UITextView {
override public func canPerformAction(_ action: Selector, withSender sender: Any?) -> Bool {
return false
}
}
答案 18 :(得分：0)
Swift 4，Xcode 9.2
以下是链接的不同方法，将UITextView的JS_CODE = """
# This file contains the JavaScript (CoffeeScript) implementation
# for a Bokeh custom extension. The "surface3d.py" contains the
# python counterpart.
#
# This custom model wraps one part of the third-party vis.js library:
#
# http://visjs.org/index.html
#
# Making it easy to hook up python data analytics tools (NumPy, SciPy,
# Pandas, etc.) to web presentations using the Bokeh server.
# These "require" lines are similar to python "import" statements
import * as p from "core/properties"
import {LayoutDOM, LayoutDOMView} from "models/layouts/layout_dom"
# This defines some default options for the Graph3d feature of vis.js
# See: http://visjs.org/graph3d_examples.html for more details.
OPTIONS =
width: '700px'
height: '700px'
style: 'dot-color'
showPerspective: true
showGrid: true
keepAspectRatio: true
verticalRatio: 1.0
showLegend: false
cameraPosition:
horizontal: -0.35
vertical: 0.22
distance: 1.8
dotSizeRatio: 0.01
tooltip: (point) -> return 'Party: <b>' + point.z + '</b><br>' + 'Name of the politician: <b>' + point.data.extra
# To create custom model extensions that will render on to the HTML canvas
# or into the DOM, we must create a View subclass for the model. Currently
# Bokeh models and views are based on BackBone. More information about
# using Backbone can be found here:
#
# http://backbonejs.org/
#
# In this case we will subclass from the existing BokehJS ``LayoutDOMView``,
# corresponding to our
export class Surface3dView extends LayoutDOMView
initialize: (options) ->
super(options)
url = "http://visjs.org/dist/vis.js"
script = document.createElement('script')
script.src = url
script.async = false
script.onreadystatechange = script.onload = () => @_init()
document.querySelector("head").appendChild(script)
_init: () ->
# Create a new Graph3s using the vis.js API. This assumes the vis.js has
# already been loaded (e.g. in a custom app template). In the future Bokeh
# models will be able to specify and load external scripts automatically.
#
# Backbone Views create <div> elements by default, accessible as @el. Many
# Bokeh views ignore this default <div>, and instead do things like draw
# to the HTML canvas. In this case though, we use the <div> to attach a
# Graph3d to the DOM.
@_graph = new vis.Graph3d(@el, @get_data(), OPTIONS)
# Set Backbone listener so that when the Bokeh data source has a change
# event, we can process the new data
@connect(@model.data_source.change, () =>
@_graph.setData(@get_data())
)
# This is the callback executed when the Bokeh data has an change. Its basic
# function is to adapt the Bokeh data source to the vis.js DataSet format.
get_data: () ->
data = new vis.DataSet()
source = @model.data_source
for i in [0...source.get_length()]
data.add({
x: source.get_column(@model.x)[i]
y: source.get_column(@model.y)[i]
z: source.get_column(@model.z)[i]
extra: source.get_column(@model.extra)[i]
style: source.get_column(@model.color)[i]
})
return data
# We must also create a corresponding JavaScript Backbone model sublcass to
# correspond to the python Bokeh model subclass. In this case, since we want
# an element that can position itself in the DOM according to a Bokeh layout,
# we subclass from ``LayoutDOM``
export class Surface3d extends LayoutDOM
# This is usually boilerplate. In some cases there may not be a view.
default_view: Surface3dView
# The ``type`` class attribute should generally match exactly the name
# of the corresponding Python class.
type: "Surface3d"
# The @define block adds corresponding "properties" to the JS model. These
# should basically line up 1-1 with the Python model class. Most property
# types have counterparts, e.g. ``bokeh.core.properties.String`` will be
# ``p.String`` in the JS implementatin. Where the JS type system is not yet
# as rich, you can use ``p.Any`` as a "wildcard" property type.
@define {
x: [ p.String ]
y: [ p.String ]
z: [ p.String ]
color: [ p.String ]
extra: [ p.String ]
data_source: [ p.Instance ]
}
"""
# This custom extension model will have a DOM view that should layout-able in
# Bokeh layouts, so use ``LayoutDOM`` as the base class. If you wanted to create
# a custom tool, you could inherit from ``Tool``, or from ``Glyph`` if you
# wanted to create a custom glyph, etc.
class Surface3d(LayoutDOM):
# The special class attribute ``__implementation__`` should contain a string
# of JavaScript (or CoffeeScript) code that implements the JavaScript side
# of the custom extension model.
__implementation__ = JS_CODE
# Below are all the "properties" for this model. Bokeh properties are
# class attributes that define the fields (and their types) that can be
# communicated automatically between Python and the browser. Properties
# also support type validation. More information about properties in
# can be found here:
#
# https://bokeh.pydata.org/en/latest/docs/reference/core.html#bokeh-core-properties
# This is a Bokeh ColumnDataSource that can be updated in the Bokeh
# server by Python code
data_source = Instance(ColumnDataSource)
# The vis.js library that we are wrapping expects data for x, y, z, and
# color. The data will actually be stored in the ColumnDataSource, but
# these properties let us specify the *name* of the column that should
# be used for each field.
x = String
y = String
z = String
extra = String
color = String
属性设为isSelectable
false如何使用，
class TextView: UITextView {
//MARK: Properties
open var didTouchedLink:((URL,NSRange,CGPoint) -> Void)?
override init(frame: CGRect, textContainer: NSTextContainer?) {
super.init(frame: frame, textContainer: textContainer)
}
required init?(coder aDecoder: NSCoder) {
super.init(coder: aDecoder)
}
override func draw(_ rect: CGRect) {
super.draw(rect)
}
open override func touchesEnded(_ touches: Set<UITouch>, with event: UIEvent?) {
let touch = Array(touches)[0]
if let view = touch.view {
let point = touch.location(in: view)
self.tapped(on: point)
}
}
}
extension TextView {
fileprivate func tapped(on point:CGPoint) {
var location: CGPoint = point
location.x -= self.textContainerInset.left
location.y -= self.textContainerInset.top
let charIndex = layoutManager.characterIndex(for: location, in: self.textContainer, fractionOfDistanceBetweenInsertionPoints: nil)
guard charIndex < self.textStorage.length else {
return
}
var range = NSRange(location: 0, length: 0)
if let attributedText = self.attributedText {
if let link = attributedText.attribute(NSAttributedStringKey.link, at: charIndex, effectiveRange: &range) as? URL {
print("\n\t##-->You just tapped on '\(link)' withRange = \(NSStringFromRange(range))\n")
self.didTouchedLink?(link, range, location)
}
}
}
}
答案 19 :(得分：0)
覆盖UITextView，如下所示，并使用它来保留可保存的html样式的可点击链接。
公共类LinkTextView：UITextView {
override public var selectedTextRange: UITextRange? {
get {
return nil
}
set {}
}
public init() {
super.init(frame: CGRect.zero, textContainer: nil)
commonInit()
}
required public init?(coder aDecoder: NSCoder) {
super.init(coder: aDecoder)
commonInit()
}
private func commonInit() {
self.tintColor = UIColor.black
self.isScrollEnabled = false
self.delegate = self
self.dataDetectorTypes = []
self.isEditable = false
self.delegate = self
self.font = Style.font(.sansSerif11)
self.delaysContentTouches = true
}
@available(iOS 10.0, *)
public func textView(_ textView: UITextView, shouldInteractWith URL: URL, in characterRange: NSRange, interaction: UITextItemInteraction) -> Bool {
// Handle link
return false
}
public func textView(_ textView: UITextView, shouldInteractWith URL: URL, in characterRange: NSRange) -> Bool {
// Handle link
return false
}
}