Ios 在不删除按钮的情况下拖放
问题是我必须触摸两次才能拖动按钮。。当我第一次触摸时,它会自动复制按钮和触摸结束。。现在我想要的是第一次触摸并拖动Ios 在不删除按钮的情况下拖放,ios,drag-and-drop,uibutton,Ios,Drag And Drop,Uibutton,问题是我必须触摸两次才能拖动按钮。。当我第一次触摸时,它会自动复制按钮和触摸结束。。现在我想要的是第一次触摸并拖动 point = [[[event allTouches] anyObject] locationInView:self.view]; NSData *archivedData = [NSKeyedArchiver archivedDataWithRootObject:(id)touch]; UIButton * anotherButton =(id) [NSKeyedUnarc
point = [[[event allTouches] anyObject] locationInView:self.view];
NSData *archivedData = [NSKeyedArchiver archivedDataWithRootObject:(id)touch];
UIButton * anotherButton =(id) [NSKeyedUnarchiver unarchiveObjectWithData:archivedData];
UIImage *senderImage=[(id)touch imageForState:UIControlStateNormal];
CGImageRef cgImage = [senderImage CGImage];
UIImage *copyOfImage = [[UIImage alloc] initWithCGImage:cgImage];
[anotherButton setImage:copyOfImage forState:UIControlStateNormal];
[anotherButton addTarget:self action:@selector(wasDragged:withEvent:)forControlEvents:UIControlEventTouchDragInside];
[self.view addSubview:anotherButton];
像这样做
UIButton *button = [UIButton buttonWithType:UIButtonTypeRoundedRect];
button.frame =CGRectMake(50, 50, 100, 50);
[button setTitle:@"Move me" forState:UIControlStateNormal];
[button addTarget:self action:@selector(buttonMoved:withEvent:) forControlEvents:UIControlEventTouchDragInside];
[self.view addSubview:button];
- (IBAction) buttonMoved:(UIButton *) sender withEvent:(UIEvent *) event
{
// You can make copy of button here.. you will get button as sender
CGPoint point = [[[event allTouches] anyObject] locationInView:self.view];
sender.center = point;
}
这应该可以解决你的问题,
1) 宣布,
2) 将手势识别器添加到按钮
UIPanGestureRecognizer *panGesture = [[UIPanGestureRecognizer alloc] initWithTarget:self action:@selector(handlePan:)];
[self.button addGestureRecognizer:panGesture];
3) 添加此句柄方法
- (void) handlePan:(UIPanGestureRecognizer *)recognizer {
switch([recognizer state]){
case UIGestureRecognizerStatePossible : {
}break;
case UIGestureRecognizerStateBegan: {
UIButton *button = [UIButton buttonWithType:UIButtonTypeRoundedRect];
[button setFrame:self.button.frame];
[button setTitle:self.button.titleLabel.text forState:UIControlStateNormal];
[self.view insertSubview:button belowSubview:self.button];
self.tempButton = button;
NSLog(@"UIGestureRecognizerStateBegan");
}break;
case UIGestureRecognizerStateChanged: {
CGPoint translation = [recognizer translationInView:self.view];
recognizer.view.center = CGPointMake(recognizer.view.center.x + translation.x,
recognizer.view.center.y + translation.y);
[recognizer setTranslation:CGPointMake(0, 0) inView:self.view];
}break;
case UIGestureRecognizerStateCancelled: {
}break;
case UIGestureRecognizerStateFailed: {
}break;
case UIGestureRecognizerStateRecognized: {
[self.tempButton removeFromSuperview];
self.tempButton = nil;
}break;
}
}
此代码不会复制您触摸过的按钮。。我以前试过…为什么你想要button的副本?因为他们在我的自定义键盘上使用它。。假设您触摸a按钮,它会复制a按钮,与其他按钮b、c、d、e、f、g等相同。。
- (void) handlePan:(UIPanGestureRecognizer *)recognizer {
switch([recognizer state]){
case UIGestureRecognizerStatePossible : {
}break;
case UIGestureRecognizerStateBegan: {
UIButton *button = [UIButton buttonWithType:UIButtonTypeRoundedRect];
[button setFrame:self.button.frame];
[button setTitle:self.button.titleLabel.text forState:UIControlStateNormal];
[self.view insertSubview:button belowSubview:self.button];
self.tempButton = button;
NSLog(@"UIGestureRecognizerStateBegan");
}break;
case UIGestureRecognizerStateChanged: {
CGPoint translation = [recognizer translationInView:self.view];
recognizer.view.center = CGPointMake(recognizer.view.center.x + translation.x,
recognizer.view.center.y + translation.y);
[recognizer setTranslation:CGPointMake(0, 0) inView:self.view];
}break;
case UIGestureRecognizerStateCancelled: {
}break;
case UIGestureRecognizerStateFailed: {
}break;
case UIGestureRecognizerStateRecognized: {
[self.tempButton removeFromSuperview];
self.tempButton = nil;
}break;
}
}