I have to zoom an image in UIScrollView
and after zooming i wants crop the image which is visible in UIImageView
. I have the following problems:
1) Image not zooming, viewForZoomingInScrollView
method not called.
2) This is my second question about cropping, the first is here . How can I crop the zoomed image after zooming?
My code is:
@interface ViewController : UIViewController<UIScrollViewDelegate>
{
UIImageView *imageView1;
UIScrollView *scroll;
}
@property(nonatomic,retain) UIImageView *imageView1;
@end
and in .m file
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
CGRect frame1 = CGRectMake(10,10,190,200);
self.imageView1.userInteractionEnabled = YES;
imageView1=[[UIImageView alloc]initWithFrame:frame1];
imageView1.contentMode = UIViewContentModeScaleToFill;
imageView1.image= [UIImage imageNamed:@"back.jpeg"];
CGRect frame = CGRectMake(10,10,190,200);
scroll = [[UIScrollView alloc] initWithFrame:frame];
scroll.contentSize = CGSizeMake(240, 260);
scroll.showsHorizontalScrollIndicator = YES;
scroll.showsVerticalScrollIndicator = YES;
scroll.clipsToBounds = YES;
scroll.backgroundColor=[UIColor blackColor];
[scroll addSubview:imageView1];
[imageView1 release];
scroll.minimumZoomScale = 0.55;
scroll.maximumZoomScale = 2.0;
scroll.delegate=self;
[self.view addSubview:scroll];
self.imageView1.userInteractionEnabled = YES;
}
- (UIView *)viewForZoomingInScrollView:(UIScrollView *)scrollView
{
NSLog(@"delegate method called");
return self.imageView1;
}
Implement UIScrollViewDelegate and call this function in ViewDidLoad of your controller.
-(void)setContentSizeForScrollView
{
scrollView.contentSize = CGSizeMake(YOURIMAGEVIEW.frame.size.width, YOURIMAGEVIEW.frame.size.height);
scrollView.minimumZoomScale = 1.0;
scrollView.maximumZoomScale = 5.0;
}
and write this function
- (UIView *)viewForZoomingInScrollView:(UIScrollView *)scrollView
{
return YOURIMAGEVIEW;
}
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