开发者

CGAffineTransformMakeScale and inserting subviews

After i apply CGAffineTransformMakeScale(scale,scale) (for example scale = 3.0) to the view - it's scaling ok. But when I'm trying to programmatically insert some subview after scaling - subview also scales 开发者_运维知识库by 3 times - and I don't want it to be scaled. What I'm doing wrong?


    - (void)viewDidLoad {
    [UIView beginAnimations:nil context:NULL];
        [UIView setAnimationDuration:1.5];
        // other animations goes here
        //imageView is a global variable of UIImageView with frame         
           //CGrectMake(0,0,160,240);
             imageView.transform =CGAffineTransformMakeScale(2.0,2.0);//CGAffineTransformMakeRotation(M_PI*0.5);
        // other animations goes here
        [UIView commitAnimations];
        [super viewDidLoad];
        NSLog(@"THe imageView rect is %@",NSStringFromCGRect(imageView.frame));
        [self performSelector:@selector(addImage) withObject:nil afterDelay:1.5];


}

//adding subview as you needed.

> -(void)addImage {
>    
> 
>  CGRect rect=imageView.frame;
>       rect.origin.x=0;
>       rect.origin.y=0;
>       [imageView setFrame:rect];
>       UIImageView *imageViewTwo=[[UIImageView alloc] initWithImage:
> [UIImage=imageNamed:@"photo-4.PNG"]];
>       [imageViewTwo setFrame:CGRectMake(0, 0, 160,
> 240)];//it will be scaled two //times
> as its superview 
>       [imageView addSubview:imageViewTwo];
>       NSLog(@"the frame of the subv iew is
> %@",NSStringFromCGRect(imageViewTwo.frame));
>       [imageViewTwo release];
>        }

//Resolution : Subview will also be scaled , as much as the superview, so , the possible solution will be to rescale the subView to its original size. For example if you have scaled superview to 2.0,2.0 , add sub view with original frame as you needed, then apply CGAffineTransformMakeScale(0.5,0.5);, I think it will solve your problem. enter code here //Also, after we apply transform, the origin also changes. We can reset it to (0,0) after transform.

0

上一篇:

下一篇:

精彩评论

暂无评论...
验证码 换一张
取 消

最新问答

问答排行榜