由于各种原因,我已将这些方法从UIView子类移动到我的viewcontroller.除了一件事,我终于得到了它.我不仅可以拖动我以编程方式创建的UI
Imageviews,而且实际的视图控制器视图也是可拖动的.创造这种非常不受欢迎的效果.我猜这是事实,它触及任何对象,背景本身就是一个对象.我只是不确定如何排除背景.我认为它需要“启用UserInteraction”,但我猜不是吗?我只想让它使UIImageViews可拖动.请原谅我的noobness.我还在学习.
我想要一个名为“letterDictionary”的NSMutableDictionary中我想要“触摸”的所有图像视图.是否可以只触摸适用于字典中的内容?
- (void) touchesBegan:(NSSet*)touches withEvent:(UIEvent*)event {
UITouch *touch = [touches anyObject];
touchPoint = [touch locationInView:self.view];
movingLetter = [touch view];
CGPoint pointInside = [touch locationInView:[touch view]];
if ([movingLetter pointInside:pointInside withEvent:event]) touchedInside = YES;
}
- (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event {
if (touchedInside) {
UITouch *touch = [touches anyObject];
CGPoint newPoint = [touch locationInView:self.view]; // get the new touch location
movingLetter.center = CGPointMake(movingLetter.center.x + newPoint.x - touchPoint.x, movingLetter.center.y + newPoint.y - touchPoint.y);
touchPoint = newPoint;
}
}
- (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event {
if (touchedInside) {
UITouch *touch = [touches anyObject];
CGPoint newPoint = [touch locationInView:self.view];
movingLetter.center = CGPointMake(movingLetter.center.x + newPoint.x - touchPoint.x, movingLetter.center.y + newPoint.y - touchPoint.y);
if (CGRectIntersectsRect([movingLetter frame], [placeHolder frame]))
{
movingLetter.center = placeHolder.center;
}
}
touchedInside = NO;
}
- (void)touchesCancelled:(NSSet *)touches withEvent:(UIEvent *)event {
touchedInside = NO;
}
最佳答案 你有被触动的观点,
UITouch *touch = [touches anyObject];
touchPoint = [touch locationInView:self.view];
movingLetter = [touch view];
只是测试它是否是你正在寻找的类(例如UIImageView)然后返回
UITouch *touch = [touches anyObject];
if (![[touch view] isKindOfClass:[UIImageView class]])
{
return;
}