两个观察：
我通常使用手势识别器来处理这样的事情，而不是各种touchUp...方法。
我知道你说过你不想通过子视图快速枚举，但为什么不呢？仅仅因为某些类与其他类不同不是问题（因为您可以只测试该isKindOfClass方法）。（而且，顺便说一句，我不知道为什么有些会是按钮，有些不会。）仅仅因为它们没有排列真的没有区别，要么。
无论如何，对于这样的事情，我经常将手势识别器放在共享父视图（例如通常是视图控制器的视图）上，然后枚举子视图以查看当前 CGPoint 包含在哪个视图中？
CGPoint location = [sender locationInView:self.view];
for (UIView *subview in self.view.subviews)
{
if (CGRectContainsPoint(subview.frame, location))
{
// do your appropriate highlighting
if ([subview isKindOfClass:[UIButton class]])
{
// something for buttons
}
else if ([subview isKindOfClass:[UIImageView class]])
{
// something for imageviews
}
return;
}
}
我不知道这对你是否有意义，但对我来说似乎最简单。如果你澄清你的意图，也许我可以进一步完善我的答案。
作为一个实际的例子，你可以定义一个连续的手势识别器来跟踪被点击的第一个和最后一个子视图（如果你没有在子视图上开始你的手势，则不会生成手势，如果你不' t 在子视图上停止手势，它会取消整个操作），例如：
@interface SubviewGestureRecognizer : UIGestureRecognizer
@property (nonatomic,strong) UIView *firstSubview;
@property (nonatomic,strong) UIView *currentSubview;
@end
@implementation SubviewGestureRecognizer
- (id) initWithTarget:(id)target action:(SEL)action
{
self = [super initWithTarget:target action:action];
if (self)
{
self.firstSubview = nil;
self.currentSubview = nil;
}
return self;
}
// you might want to tweak this `identifySubview` to only look
// for buttons and imageviews, or items with nonzero tag properties,
// or recursively navigate if it encounters container UIViews
// or whatever suits your app
- (UIView *)identifySubview:(NSSet *)touches
{
CGPoint location = [[touches anyObject] locationInView:self.view];
for (UIView *subview in self.view.subviews)
{
if (CGRectContainsPoint(subview.frame, location))
{
return subview;
}
}
return nil;
}
- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{
[super touchesBegan:touches withEvent:event];
if ([touches count] != 1)
{
self.state = UIGestureRecognizerStateFailed;
return;
}
self.firstSubview = [self identifySubview:touches];
self.currentSubview = self.firstSubview;
if (self.firstSubview == nil)
self.state = UIGestureRecognizerStateFailed;
else
self.state = UIGestureRecognizerStateBegan;
}
- (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event
{
[super touchesMoved:touches withEvent:event];
if (self.state == UIGestureRecognizerStateFailed) return;
self.currentSubview = [self identifySubview:touches];
self.state = UIGestureRecognizerStateChanged;
}
- (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event
{
[super touchesEnded:touches withEvent:event];
self.currentSubview = [self identifySubview:touches];
if (self.currentSubview != nil)
self.state = UIGestureRecognizerStateEnded;
else
self.state = UIGestureRecognizerStateFailed;
}
- (void)reset
{
[super reset];
self.firstSubview = nil;
self.currentSubview = nil;
}
然后，您可以在以下位置进行设置viewDidLoad：
SubviewGestureRecognizer *recognizer = [[SubviewGestureRecognizer alloc] initWithTarget:self action:@selector(handleTouches:)];
[self.view addGestureRecognizer:recognizer];
然后像这样定义你的处理程序（这适用于按钮和图像视图，利用两者都支持的事实setHighlighted）：
- (void)handleTouches:(SubviewGestureRecognizer *)sender
{
static UIControl *previousControl = nil;
if (sender.state == UIGestureRecognizerStateBegan || sender.state == UIGestureRecognizerStateChanged)
{
if (sender.state == UIGestureRecognizerStateBegan)
previousControl = nil;
UIView *subview = sender.currentSubview;
if (previousControl != subview)
{
// reset the old one (if any)
[previousControl setHighlighted:NO];
// highlight the new one
previousControl = (UIControl *)subview;
[previousControl setHighlighted:YES];
}
}
else if (sender.state == UIGestureRecognizerStateEnded)
{
if (previousControl)
{
[previousControl setHighlighted:NO];
NSLog(@"successfully touchdown on %@ and touchup on %@", sender.firstSubview, sender.currentSubview);
}
}
else if (sender.state == UIGestureRecognizerStateCancelled || sender.state == UIGestureRecognizerStateFailed)
{
[previousControl setHighlighted:NO];
NSLog(@"cancelled/failed gesture");
}
}