如何使用UITouches移動CGRect？

Question

如何使用uitouches移動CGRect？ 如果有人有想法請解釋。

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

[self setNeedsDisplay];

Answer 1

嗨，根據我的理解，您需要將裁剪后的圖像移到另一個位置，因此需要在觸摸內容中進行編碼...

-(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];
}

在這里，雲是UIImageView，您可以將其作為裁剪的圖像....

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

我希望它可以幫助您...

Answer 2

您需要重置矩形框：

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