我如何添加一个触摸事件到一个UIView? 我试一试:
UIView *headerView = [[[UIView alloc] initWithFrame:CGRectMake(0, 0, tableView.bounds.size.width, nextY)] autorelease];
[headerView addTarget:self action:@selector(myEvent:) forControlEvents:UIControlEventTouchDown];
// ERROR MESSAGE: UIView may not respond to '-addTarget:action:forControlEvents:'
我不想创建一个子类然后重写
- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
当前回答
在iOS 3.2及更高版本中，你可以使用手势识别器。例如，这是你处理点击事件的方式:
//The setup code (in viewDidLoad in your view controller)
UITapGestureRecognizer *singleFingerTap =
[[UITapGestureRecognizer alloc] initWithTarget:self
action:@selector(handleSingleTap:)];
[self.view addGestureRecognizer:singleFingerTap];
//The event handling method
- (void)handleSingleTap:(UITapGestureRecognizer *)recognizer
{
CGPoint location = [recognizer locationInView:[recognizer.view superview]];
//Do stuff here...
}
还有一些内置的手势。查看iOS事件处理和UIGestureRecognizer的文档。我还在github上有一堆示例代码，可能会有所帮助。
其他回答
以下是Swift版本:
// MARK: Gesture Extensions
extension UIView {
func addTapGesture(#tapNumber: Int, target: AnyObject, action: Selector) {
let tap = UITapGestureRecognizer (target: target, action: action)
tap.numberOfTapsRequired = tapNumber
addGestureRecognizer(tap)
userInteractionEnabled = true
}
func addTapGesture(#tapNumber: Int, action: ((UITapGestureRecognizer)->())?) {
let tap = BlockTap (tapCount: tapNumber, fingerCount: 1, action: action)
addGestureRecognizer(tap)
userInteractionEnabled = true
}
}
这是ios tapgesture; 首先，你需要为GestureRecognizer创建动作，在动作下面写如下所示的代码
- (IBAction)tapgesture:(id)sender
{
[_password resignFirstResponder];
[_username resignFirstResponder];
NSLog(@" TapGestureRecognizer tapped");
}
另一种方法是向视图添加一个透明按钮
UIButton *b = [UIButton buttonWithType:UIButtonTypeCustom];
b.frame = CGRectMake(0, 0, headerView.width, headerView.height);
[headerView addSubview:b];
[b addTarget:self action:@selector(buttonClicked:) forControlEvents:UIControlEventTouchDown];
然后，handle click:
- (void)buttonClicked:(id)sender
{}
创建一个手势识别器(子类)，它将实现触摸事件，如touchesBegan。之后可以将其添加到视图中。
这样您将使用组合而不是子类化(这是请求)。
你们为什么不试试ssevenlistener呢?
您不需要创建任何手势识别器，并将您的逻辑分离到另一个方法。ssevenlistener支持在视图上设置侦听器块，以侦听单个点击手势，双击手势和N-tap手势，如果你喜欢，和长按手势。设置一个点击手势监听器是这样的:
[view ss_addTapViewEventListener:^(UITapGestureRecognizer *recognizer){…} numberOfTapsRequired: 1);
