Iphone 屏幕坐标与CGAffineTransform

我正在使用手势触摸功能旋转调整图像大小。现在我想做的是，当图像到达某个X，Y点时，它会从视图中消失

当我与CGpoint合作时，效果很好

如何从CGT变换矩阵中获取（x y）坐标

我当前使用的代码是

- (void)updateOriginalTransformForTouches:(NSSet *)touches 
{
    if ([touches count] > 0) {
        CGAffineTransform incrementalTransform = [self incrementalTransformWithTouches:touches];
        [self setConstrainedTransform:CGAffineTransformConcat(originalTransform, incrementalTransform)];
        originalTransform = self.transform;
    }
}

// At start, store the touch begin points and set an original transform
- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event 
{
    [[self superview] bringSubviewToFront:self];
    NSMutableSet *currentTouches = [[[event touchesForView:self] mutableCopy] autorelease];
    [currentTouches minusSet:touches];
    if ([currentTouches count] > 0) {
        [self updateOriginalTransformForTouches:currentTouches];
        [self cacheBeginPointForTouches:currentTouches];
    }
    [self cacheBeginPointForTouches:touches];
}

// During movement, update the transform to match the touches
- (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event 
{
    CGAffineTransform incrementalTransform = [self incrementalTransformWithTouches:[event touchesForView:self]];
    [self setConstrainedTransform:CGAffineTransformConcat(originalTransform, incrementalTransform)];

    NSLog(@"%f",incrementalTransform.tx);
    NSLog(@"%f",incrementalTransform.ty);

    if (incrementalTransform.tx == 44 && incrementalTransform.ty == 281) {
        NSLog(@"dvvd");
    }
}

// Finish by removing touches, handling double-tap requests
- (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event 
{
    [self updateOriginalTransformForTouches:[event touchesForView:self]];
    [self removeTouchesFromCache:touches];

    for (UITouch *touch in touches) {
        if (touch.tapCount >= 2) {
            [self.superview bringSubviewToFront:self];
        }
    }

    NSMutableSet *remainingTouches = [[[event touchesForView:self] mutableCopy] autorelease];
    [remainingTouches minusSet:touches];
    [self cacheBeginPointForTouches:remainingTouches];
}// Redirect cancel to ended
- (void)touchesCancelled:(NSSet *)touches withEvent:(UIEvent *)event 
{
    [self touchesEnded:touches withEvent:event];
}

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您是否询问如何确定视图的矩形在当前坐标系中的位置？如果是,

CGRect transformedFrame = CGRectApplyAffineTransform(self.frame, incrementalTransform);

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好的，我想回答我自己的问题

我一直在寻找各种方法来完成我的任务，昨晚我找到了一些对我的任务更方便的方法

我使用的链接也是如此

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它对我有用

我进一步向你介绍了它。。。我的屏幕上几乎没有图像（没有UIImageView），这些图像可以调整大小和旋转（使用我提供的代码），现在我想做的是删除视图中的任何图像。为了实现这一点，用户必须将其拖动到某个位置，在该位置将有垃圾箱的另一个图像（将固定到视图中）（假设该图像的位置为（100100）），如果用户将该图像拖动到该坐标，则图像将从视图中删除///