我有一个带有TableView的页面,它用一些文本的硬编码UILabel填充每个单元格。我希望它能填满我上网的JSON中的UILabels。
代码:
import UIKit
class ViewController: UIViewController {
@IBOutlet weak var tableView: UITableView!
var objects: NSMutableArray! = NSMutableArray()
override func viewDidLoad(){
super.viewDidLoad()
self.objects.add("iPhone")
self.objects.add("Apple Watch")
self.objects.add("Mac")
self.objects.add("Test")
self.tableView.reloadData()
}
override func didReceiveMemoryWarning(){
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
func numberOfSectionsInTableView(_ tableView: UITableView) -> Int{
return 1
}
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int{
return self.objects.count
}
func tableView(_ tableView: UITableView, cellForRowAtIndexPath indexPath: IndexPath) -> UITableViewCell{
let cell = self.tableView.dequeueReusableCell(withIdentifier: "cell", for: indexPath) as! TableViewCell
cell.titleLabel.text = self.objects.object(at: (indexPath as NSIndexPath).row) as? String
//cell.logButton.tag = (indexPath as NSIndexPath).row;
//cell.logButton.addTarget(self, action: #selector(ViewController.logAction(_:)), for: .touchUpInside)
return cell
}
func tableView(_ tableView: UITableView, didSelectRowAtIndexPath indexPath: IndexPath){
self.performSegue(withIdentifier: "showView", sender: self)
}
@IBAction func logAction(_ sender: UIButton) {
let titleString = self.objects[sender.tag] as? String
let firstActivityItem = "\(titleString!)"
let activityViewController : UIActivityViewController = UIActivityViewController(activityItems: [firstActivityItem], applicationActivities: nil)
self.present(activityViewController, animated: true, completion: nil)
}
override func prepare(for segue: UIStoryboardSegue, sender: Any?){
if (segue.identifier == "showView"){
let upcoming: NewViewController = segue.destination as! NewViewController
let indexPath = self.tableView.indexPathForSelectedRow!
let titleString = self.objects.object(at: indexPath.row) as? String
upcoming.titleString = titleString
self.tableView.deselectRow(at: indexPath, animated: true)
}
}
}
一旦进入模拟器并打开页面,TableView就会有四个单元格,其中“Label”会更改为添加到objects
数组的任何内容,在这种情况下是iPhone,Apple Watch,Mac,和测试。我希望从JSON文件加载项目,而不是那些硬编码。
我对PickerView做了同样的事情,但我正在努力弄清楚如何用它来做这件事。如果有帮助的话,我的PickerView是如何完成的:
Alamofire.request(“example.com/file.json”)。responseJSON {response in
if let JSON = response.result.value as? [String:AnyObject] {
self.mypickerview.delegate = self
self.mypickerview.dataSource = self
let result = JSON.values.flatMap({ String(describing: $0) })
self.pickerData.append(contentsOf: result)
self.pickerData.sort()
self.verbose.text = "Content saved!"
self.mypickerview.reloadAllComponents()
self.mypickerview.delegate = self;
self.verbose.text = "Finished Loading!"
}
}
JSON文件:
{"One":"Mac","Two":"Apple iPhone","Three":"Test"}
答案 0 :(得分:0)
1.在viewDidLoad上触发webService。 2.在Webservice完成处理程序上,检索标签值并分配给对象。 3.Reload tableview。
答案 1 :(得分:0)
你的JSON应该是这样的:
{ "标题":[ " MAC&#34 ;, " iphone&#34 ;, "测试" ] }
您将执行cell.titleLabel.text = [[yourJSON valueForKey:@"titles"] objectAtIndex:indexPath.row];
(这是Obj-C版本,但也可以在swift中完成)