UIControlEventTouchDragInside当一次触摸在控件窗口内拖动时。UIControlEventTouchDragOutside当一次触摸在控件窗口之外拖动时。UIControlEventTouchDragEnter当一次触摸从控件窗口之外拖动到内部时。UIControlEventTouchDragExit当一次触摸从控件窗口内部拖动到外部时。
[btn addTarget:self action:@selector(sendButtonDrag:withEvent:) forControlEvents:UIControlEventTouchDragInside];
[btn addTarget:self action:@selector(sendButtonDrag:withEvent:) forControlEvents:UIControlEventTouchDragOutside];
(IBAction)sendButtonDrag:(UIButton *)sender withEvent:(UIEvent *)event {
if ([self isInButtonBounds:sender event:event]) {
// 在里面
} else {
// 在外面
}
}(BOOL)isInButtonBounds:(UIButton *)button event:(UIEvent *)event {
UITouch *touch = [[event allTouches] anyObject];
CGFloat boundsExtension = 5.0f; //扩展范围阀值
CGRect outerBounds = CGRectInset(button.bounds, -1 * boundsExtension, -1 * boundsExtension);
BOOL touchOutside = !CGRectContainsPoint(outerBounds, [touch locationInView:button]);
if (touchOutside) {
BOOL previewTouchInside = CGRectContainsPoint(outerBounds, [touch previousLocationInView:button]);
if (previewTouchInside) {
// UIControlEventTouchDragExit
} else {
// UIControlEventTouchDragOutside
}
return NO;
} else {
BOOL previewTouchOutside = !CGRectContainsPoint(outerBounds, [touch previousLocationInView:button]);
if (previewTouchOutside) {
// UIControlEventTouchDragEnter
} else {
// UIControlEventTouchDragInside
}
return YES;
}
}
- (IBAction)sendAudioRecordButton:(id)sender withEvent:(UIEvent *)event {
if ([self isInButtonBounds:sender event:event]) {
// 点击按钮
}
}
