如何使用UITouches移动CGRect？

Question

如何使用uitouches移动CGRect？ 如果有人有想法请解释。

if(areaSelected)
        return;
    UITouch *mytouch=[[touches allObjects] objectAtIndex:0];
    [myPath addLineToPoint:[mytouch locationInView:self]];

[self setNeedsDisplay];

Answer 1

嗨，根据我的理解，您需要将裁剪后的图像移到另一个位置，因此需要在触摸内容中进行编码...

-(void) touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
    UITouch *touch = [[event allTouches] anyObject];
    CGPoint location = [touch locationInView:touch.view];
    cloud.center = location;
}

-(void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event {
    [self touchesBegan:touches withEvent:event];
}

在这里，云是UIImageView，您可以将其作为裁剪的图像....

 cloud.image=croppedImage;   //[you must assign this first...]

我希望它可以帮助您...

Answer 2

您需要重置矩形框：

[cropRect setFrame:CGRectMake(<new x coordinate>, <new y coordinate>, width, height)]