检测Tap&保留在UITableView单元格中
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06-07-2019 - |
题
我们如何检测水龙头& amp;按住 UITableViewCell
?
解决方案
在iOS 3.2或更高版本中,您可以使用 <代码> UILongPressGestureRecognizer 代码>
其他提示
这是直接从我的应用程序解除的代码。您应该将这些方法(以及布尔_cancelTouches成员)添加到从UITableViewCell派生的类中。
-(void) tapNHoldFired {
self->_cancelTouches = YES;
// DO WHATEVER YOU LIKE HERE!!!
}
-(void) cancelTapNHold {
[NSObject cancelPreviousPerformRequestsWithTarget:self selector:@selector(tapNHoldFired) object:nil];
}
- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
self->_cancelTouches = NO;
[super touchesBegan:touches withEvent:event];
[self performSelector:@selector(tapNHoldFired) withObject:nil afterDelay:.7];
}
- (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event {
[self cancelTapNHold];
if (self->_cancelTouches)
return;
[super touchesEnded:touches withEvent:event];
}
- (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event{
[self cancelTapNHold];
[super touchesMoved:touches withEvent:event];
}
- (void)touchesCancelled:(NSSet *)touches withEvent:(UIEvent *)event {
[self cancelTapNHold];
[super touchesCancelled:touches withEvent:event];
}
//Add gesture to a method where the view is being created. In this example long tap is added to tile (a subclass of UIView):
// Add long tap for the main tiles
UILongPressGestureRecognizer *longPressGesture = [[UILongPressGestureRecognizer alloc] initWithTarget:self action:@selector(longTap:)];
[tile addGestureRecognizer:longPressGesture];
[longPressGesture release];
-(void) longTap:(UILongPressGestureRecognizer *)gestureRecognizer{
NSLog(@"gestureRecognizer= %@",gestureRecognizer);
if ([gestureRecognizer state] == UIGestureRecognizerStateBegan) {
NSLog(@"longTap began");
}
}
您应该处理 UIControlTouchDown 事件,并根据您的意思“保持”,触发NSTimer,该NSTimer将计算自您启动触摸后的间隔,并在触发或释放触摸时无效( UIControlTouchUpInside 和 UIControlTouchUpOutside 事件)。当计时器触发时,你有“tap&amp; amp;定妆QUOT;检测
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