Why won't my CATiledLayer scroll in a UIScrollView after zooming?
- by Brodie4598
I'm currently having the following problem with CATiledLayer: when the view first loads, the scrolling works perfectly, but then when you zoom once, the view snaps to the anchor point (top left corner) and it can no longer scroll at all. The zooming works in that it will zoom in and out, but it will only zoom to the top left corner.
My code is as follows:
#import <QuartzCore/QuartzCore.h>
#import "PracticeViewController.h"
@implementation practiceViewController
//@synthesize image;
- (void)viewDidLoad
{
NSString *path = [[NSBundle mainBundle] pathForResource:@"H-5" ofType:@"jpg"];
NSData *data = [NSData dataWithContentsOfFile:path];
image = [UIImage imageWithData:data];
CGRect pageRect = CGRectMake(0, 0, image.size.width, image.size.height);
CATiledLayer *tiledLayer = [CATiledLayer layer];
tiledLayer.anchorPoint = CGPointMake(0.0f, 1.0f);
tiledLayer.delegate = self;
tiledLayer.tileSize = CGSizeMake(1000, 1000);
tiledLayer.levelsOfDetail = 6;
tiledLayer.levelsOfDetailBias = 0;
tiledLayer.bounds = pageRect;
tiledLayer.transform = CATransform3DMakeScale(1.0f, -1.0f, 0.3f);
myContentView = [[UIView alloc] initWithFrame:self.view.bounds];
[myContentView.layer addSublayer:tiledLayer];
UIScrollView *scrollView = [[UIScrollView alloc] initWithFrame:self.view.bounds];
scrollView.delegate = self;
scrollView.contentSize = pageRect.size;
scrollView.minimumZoomScale = .2;
scrollView.maximumZoomScale = 1;
[scrollView addSubview:myContentView];
[self.view addSubview:scrollView];
}
- (UIView *)viewForZoomingInScrollView:(UIScrollView *)scrollView
{
return myContentView;
}
- (void)drawLayer:(CALayer *)layer inContext:(CGContextRef)ctx
{
NSString *path = [[NSBundle mainBundle] pathForResource:@"H-5" ofType:@"jpg"];
NSData *data = [NSData dataWithContentsOfFile:path];
image = [UIImage imageWithData:data];
CGRect imageRect = CGRectMake (0.0, 0.0, image.size.width, image.size.height);
CGContextDrawImage (ctx, imageRect, [image CGImage]);
}
@end
