我有一个问题,我担心有一个简单的解决方案。每次调用 'createNewSetInDB:' 方法时,都会创建一个新的 UIButton*,为用户按下按钮分配一个目标,并为用户长按按钮分配一个 UILongPressGesture*。
当用户点击这些按钮之一时,会正确调用“openSet:”方法。'showHandles:' 长按方法只为创建的 LAST UIButton* 调用。因此,如果“createNewSetInDB:”方法被调用 4 次并因此创建了 4 个 UIButton,前三个不处理 UILongPressGesture。第 4 个 UIButton 可以。
有任何想法吗?
UILongPressGestureRecognizer *showHandlesLongPress;
- (void)viewDidLoad
{
showHandlesLongPress = [[UILongPressGestureRecognizer alloc] initWithTarget:self action:@selector(showHandles:)];
showHandlesLongPress.minimumPressDuration = .5;
}
- (void)createNewSetInDB:(BOOL)doWeAddItToTheDatabase
{
UIButton *newSet = [[UIButton alloc]initWithFrame:
CGRectMake((sliderMusic.frame.origin.x + imgWhiteLine.frame.size.width / 2) + (_musicPlayer.currentPlaybackTime * 10),
6,
35,
25)];
[newSet addTarget:self action:@selector(openSet:) forControlEvents:UIControlEventTouchUpInside];
[newSet setTitleColor:[MobileMarcherVariables sharedVariableInstance].systemColor forState:UIControlStateNormal];
[newSet.layer setBorderColor:[[MobileMarcherVariables sharedVariableInstance].systemColor CGColor]];
[newSet.layer setBorderWidth:1];
[newSet.titleLabel setFont:[UIFont systemFontOfSize:15]];
[newSet setTitle:[NSString stringWithFormat:@"%i",totalNumberOfSets] forState:UIControlStateNormal];
[scrollviewMusic addSubview:newSet];
[arrayofSetButtons addObject:newSet];
[newSet addGestureRecognizer:showHandlesLongPress];
if (doWeAddItToTheDatabase) [[NSNotificationCenter defaultCenter] postNotification:newSetNotification];
}
- (void)showHandles:(UILongPressGestureRecognizer*)gesture
{
if (gesture.state == UIGestureRecognizerStateBegan)
{
NSLog(@"long press");
for (UIButton *but in arrayofSetButtons)
{
if (but.tag != gesture.view.tag)
{
but.alpha = .5;
}
}
[scrollviewMusic bringSubviewToFront:lefthandle];
[scrollviewMusic bringSubviewToFront:righthandle];
lefthandle.hidden = NO;
righthandle.hidden = NO;
lefthandle.frame = CGRectMake(gesture.view.frame.origin.x - 1,
gesture.view.frame.origin.y - gesture.view.frame.size.height,
2, 50);
righthandle.frame = CGRectMake((gesture.view.frame.origin.x - 1) + gesture.view.frame.size.width,
gesture.view.frame.origin.y - gesture.view.frame.size.height,
2, 50);
}
}