我在UITextField顶部有一个UIScrollView，而在编辑时我看不到键盘。怎么做？
请事先帮助我解决这个问题。
-(void)viewdidload{
txtsearch =[[UITextField alloc]init];
[txtsearch setFrame:CGRectMake(410, 35,250, 30)];
[txtsearch setBorderStyle:UITextBorderStyleRoundedRect];
txtsearch.placeholder = @"Enter Company/Provider Name";
txtsearch.text=[NSString stringWithFormat:@"%@",appDelegate.searchFieldName];
txtsearch.autocorrectionType = UITextAutocorrectionTypeNo;
txtsearch.font = [UIFont fontWithName:@"Helvetica" size:14];
txtsearch.delegate=self;
txtsearch.clearButtonMode = UITextFieldViewModeWhileEditing;
[testscroll addSubview:txtsearch];
btnSearch = [UIButton buttonWithType:UIButtonTypeRoundedRect];
[btnSearch addTarget:self
action:@selector(showResults:)
forControlEvents:UIControlEventTouchDown];
[btnSearch setBackgroundImage:[UIImage imageNamed:@"search_button_hover.png"] forState:UIControlStateNormal];
btnSearch.frame = CGRectMake(510, 80, 75, 35.0);
[testscroll addSubview:btnSearch];
if(self.tableView)
[self.tableView removeFromSuperview];
self.tableView=[[UITableView alloc] initWithFrame:CGRectMake(0,210,730,[arr count]*160) style:UITableViewStylePlain];
self.tableView.delegate=self;
self.tableView.dataSource=self;
self.tableView.scrollEnabled = NO;
[testscroll addSubview:self.tableView];
[self.tableView reloadData];
self.tableView.frame = CGRectMake(self.tableView.frame.origin.x, self.tableView.frame.origin.y, self.tableView.frame.size.width, self.tableView.contentSize.height);
float ftbl = self.tableView.frame.origin.y + self.tableView.contentSize.height + 30;
testscroll.contentSize=CGSizeMake(768, ftbl);
testscroll.scrollEnabled=YES;
}
答案 0 :(得分：0)
在你的.h文件中添加：
CGFloat animatedDistance;
在.m文件中：在@interface声明
之前添加它static const CGFloat KEYBOARD_ANIMATION_DURATION = 0.3;
static const CGFloat MINIMUM_SCROLL_FRACTION = 0.2;
static const CGFloat MAXIMUM_SCROLL_FRACTION = 0.8;
static const CGFloat PORTRAIT_KEYBOARD_HEIGHT = 264;
static const CGFloat LANDSCAPE_KEYBOARD_HEIGHT = 352;
并添加此UITextField委托方法：
- (void)textFieldDidBeginEditing:(UITextField *)textField
{
CGRect textFieldRect =
[self.view.window convertRect:textField.bounds fromView:textField];
CGRect viewRect =
[self.view.window convertRect:self.view.bounds fromView:self.view];
CGFloat midline = textFieldRect.origin.y + 0.5 * textFieldRect.size.height;
CGFloat numerator = midline - viewRect.origin.y - MINIMUM_SCROLL_FRACTION * viewRect.size. height;
CGFloat denominator =
(MAXIMUM_SCROLL_FRACTION - MINIMUM_SCROLL_FRACTION) * viewRect.size.height;
CGFloat heightFraction = numerator / denominator;
if (heightFraction < 0.0)
{
heightFraction = 0.0;
}
else if (heightFraction > 1.0)
{
heightFraction = 1.0;
}
UIInterfaceOrientation orientation = [[UIApplication sharedApplication] statusBarOrientation];
if (orientation == UIInterfaceOrientationPortrait ||
orientation == UIInterfaceOrientationPortraitUpsideDown)
{
animatedDistance = floor(PORTRAIT_KEYBOARD_HEIGHT * heightFraction);
}
else
{
animatedDistance = floor(LANDSCAPE_KEYBOARD_HEIGHT * heightFraction);
}
CGRect viewFrame = self.view.frame;
viewFrame.origin.y -= animatedDistance;
[UIView beginAnimations:nil context:NULL];
[UIView setAnimationBeginsFromCurrentState:YES];
[UIView setAnimationDuration:KEYBOARD_ANIMATION_DURATION];
[yourScrollView setFrame:viewFrame];
[UIView commitAnimations];
}
- (void)textFieldDidEndEditing:(UITextField *)textField
{
CGRect viewFrame = self.view.frame;
viewFrame.origin.y += animatedDistance;
[UIView beginAnimations:nil context:NULL];
[UIView setAnimationBeginsFromCurrentState:YES];
[UIView setAnimationDuration:KEYBOARD_ANIMATION_DURATION];
[yourScrollView setFrame:viewFrame];
[UIView commitAnimations];
}
此外，您可以使用TPKeyboardAvoiding。
答案 1 :(得分：0)
这样做，
- (void)textFieldDidBeginEditing:(UITextField *)textField
{
[self animateTextField:textField up:YES];
}
- (void)textFieldDidEndEditing:(UITextField *)textField
{
[self animateTextField:textField up:NO];
}
- (void) animateTextField: (UITextField*) textField up: (BOOL) up
{
CGPoint temp = [textField.superview convertPoint:textField.frame.origin toView:nil];
UIInterfaceOrientation orientation =
[[UIApplication sharedApplication] statusBarOrientation];
if (orientation == UIInterfaceOrientationPortrait){
if(up) {
int moveUpValue = temp.y+textField.frame.size.height;
animatedDis = 264-(1024-moveUpValue-5);
}
}
else if(orientation == UIInterfaceOrientationPortraitUpsideDown) {
if(up) {
int moveUpValue = 1004-temp.y+textField.frame.size.height;
animatedDis = 264-(1004-moveUpValue-5);
}
}
else if(orientation == UIInterfaceOrientationLandscapeLeft) {
if(up) {
int moveUpValue = temp.x+textField.frame.size.height;
animatedDis = 352-(768-moveUpValue-5);
}
}
else
{
if(up) {
int moveUpValue = 768-temp.x+textField.frame.size.height;
animatedDis = 352-(768-moveUpValue-5);
}
}
if(animatedDis>0)
{
const int movementDistance = animatedDis;
const float movementDuration = 0.3f;
int movement = (up ? -movementDistance : movementDistance);
[UIView beginAnimations: nil context: nil];
[UIView setAnimationBeginsFromCurrentState: YES];
[UIView setAnimationDuration: movementDuration];
if (orientation == UIInterfaceOrientationPortrait){
baseViewController.view.frame = CGRectOffset(baseViewController.view.frame, 0, movement);
}
else if(orientation == UIInterfaceOrientationPortraitUpsideDown) {
baseViewController.view.frame = CGRectOffset(baseViewController.view.frame, 0, movement);
}
else if(orientation == UIInterfaceOrientationLandscapeLeft) {
baseViewController.view.frame = CGRectOffset(baseViewController.view.frame, 0, movement);
}
else {
baseViewController.view.frame = CGRectOffset(baseViewController.view.frame, 0, movement);
}
[UIView commitAnimations];
}
}