我想知道如何使键盘消失时,用户触摸以外的UITextField。
当前回答
override func touchesBegan(touches: Set<UITouch>, withEvent event: UIEvent?) {
if let touch = touches.first{
view.endEditing(true)
}
}
其他回答
最好是让你的UIView成为UIControl的一个实例(在界面构建器中),然后连接他们的TouchUpInside事件来解散键盘方法。这个IBAction方法看起来像:
- (IBAction)dismissKeyboard:(id)sender {
[aTextBox resignFirstResponder];
}
我试了这里的很多回答,都不太走运。我的点击手势识别器总是导致我的UIButtons在点击时不响应,即使我将手势识别器的cancelsTouchesInView属性设置为NO。
这就是最终解决问题的方法:
有一个ivar:
UITapGestureRecognizer *_keyboardDismissGestureRecognizer;
当文本字段开始编辑时,设置手势识别器:
- (void) textFieldDidBeginEditing:(UITextField *)textField
{
if(_keyboardDismissGestureRecognizer == nil)
{
_keyboardDismissGestureRecognizer = [[[UITapGestureRecognizer alloc]
initWithTarget:self
action:@selector(dismissKeyboard)] autorelease];
_keyboardDismissGestureRecognizer.cancelsTouchesInView = NO;
[self.view addGestureRecognizer:_keyboardDismissGestureRecognizer];
}
}
窍门在于如何设置遣散键盘方法:
- (void) dismissKeyboard
{
[self performSelector:@selector(dismissKeyboardSelector) withObject:nil afterDelay:0.01];
}
- (void) dismissKeyboardSelector
{
[self.view endEditing:YES];
[self.view removeGestureRecognizer:_keyboardDismissGestureRecognizer];
_keyboardDismissGestureRecognizer = nil;
}
我猜有一些关于从触摸处理执行堆栈中获得dismissKeyboardSelector执行的东西…
这是
在本例中,aTextField是唯一的UITextField....如果有其他的uitextview,还有一点点事情要做。
// YourViewController.h
// ...
@interface YourViewController : UIViewController /* some subclass of UIViewController */ <UITextFieldDelegate> // <-- add this protocol
// ...
@end
// YourViewController.m
@interface YourViewController ()
@property (nonatomic, strong, readonly) UITapGestureRecognizer *singleTapRecognizer;
@end
// ...
@implementation
@synthesize singleTapRecognizer = _singleTapRecognizer;
// ...
- (void)viewDidLoad
{
[super viewDidLoad];
// your other init code here
[self.view addGestureRecognizer:self.singleTapRecognizer];
{
- (UITapGestureRecognizer *)singleTapRecognizer
{
if (nil == _singleTapRecognizer) {
_singleTapRecognizer = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(singleTapToDismissKeyboard:)];
_singleTapRecognizer.cancelsTouchesInView = NO; // absolutely required, otherwise "tap" eats events.
}
return _singleTapRecognizer;
}
// Something inside this VC's view was tapped (except the navbar/toolbar)
- (void)singleTapToDismissKeyboard:(UITapGestureRecognizer *)sender
{
NSLog(@"singleTap");
[self hideKeyboard:sender];
}
// When the "Return" key is pressed on the on-screen keyboard, hide the keyboard.
// for protocol UITextFieldDelegate
- (BOOL)textFieldShouldReturn:(UITextField*)textField
{
NSLog(@"Return pressed");
[self hideKeyboard:textField];
return YES;
}
- (IBAction)hideKeyboard:(id)sender
{
// Just call resignFirstResponder on all UITextFields and UITextViews in this VC
// Why? Because it works and checking which one was last active gets messy.
[aTextField resignFirstResponder];
NSLog(@"keyboard hidden");
}
这里有很多关于使用UITapGestureRecognizer的很好的答案——所有这些都打破了UITextField的clear (X)按钮。解决方案是通过它的委托来抑制手势识别器:
- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldReceiveTouch:(UITouch *)touch {
BOOL touchViewIsButton = [touch.view isKindOfClass:[UIButton class]];
BOOL touchSuperviewIsTextField = [[touch.view superview] isKindOfClass:[UITextField class]];
return !(touchViewIsButton && touchSuperviewIsTextField);
}
这不是最可靠的解决方案,但对我来说很管用。
这一定是通过触摸外部隐藏键盘的最简单方法:
- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
[self.view endEditing:YES];
}
(从如何解散键盘时,用户点击其他区域以外的文本框?)
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