按钮离开突出显示状态时的调用方法

我想在突出显示按钮时执行操作，并在离开突出显示状态时执行其他操作。 任何建议？

Answer 1

你可以使用KVO

[button addObserver:self forKeyPath:@"highlighted" options:NSKeyValueObservingOptionNew | NSKeyValueObservingOptionOld context:NULL]; 

然后

 - (void)observeValueForKeyPath:(NSString *)keyPath ofObject:(id)object change:(NSDictionary *)change context:(void *)context { if ([@"highlighted" isEqualToString:keyPath]) { NSNumber *new = [change objectForKey:@"new"]; NSNumber *old = [change objectForKey:@"old"]; if (old && [new isEqualToNumber:old]) { NSLog(@"Highlight state has not changed"); } else { NSLog(@"Highlight state has changed to %d", [object isHighlighted]); } } } 

你只关心这些变化，每次状态改变时都会调用它，例如你移动选择然后用手指向下拖动按钮外面的按钮

Answer 2

喜欢这个？

 self.testButton = [UIButton buttonWithType:UIButtonTypeRoundedRect]; [self.testButton addTarget:self action:@selector(methodOne) forControlEvents:UIControlEventTouchDown]; [self.testButton addTarget:self action:@selector(methodTwo) forControlEvents:UIControlEventTouchUpInside];