Ios 如何向 UIView 添加touch 事件

发布于01月12日

如何将touch 事件添加到UIView

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并覆盖它

- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event

推荐答案

在iOS3.2及更高版本中，你可以使用手势识别器.例如，以下是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...
}

还有一堆内置的手势.查看有关iOS事件处理和UIGestureRecognizer的文档.我还有一些关于github的示例代码，它们可能会有所帮助.