Iphone 使用navigationcontroller和包含子CALayer的视图时内存问题/溢出
我在周末没能解决这个问题。。。我原以为对Objective-C内存管理有很好的了解,但这一点很难解决 总结一下上下文:我在navigationcontroller中推送了一个类化的UIViewController。此UIViewController包含一个UIScrollView(在IB中创建)。在UIViewController viewDidLoad()函数中,我添加了一个背景PDF(在UIview层的CATiledLayer子层中) 问题是,当我从导航控制器弹出UIViewController时,应用程序崩溃 使用Zombies instruments和NSZombieLevel表明,这是因为UIViewController过度释放了 以下是UIViewController:Iphone 使用navigationcontroller和包含子CALayer的视图时内存问题/溢出,iphone,cocoa-touch,memory-management,uinavigationcontroller,release-management,Iphone,Cocoa Touch,Memory Management,Uinavigationcontroller,Release Management,我在周末没能解决这个问题。。。我原以为对Objective-C内存管理有很好的了解,但这一点很难解决 总结一下上下文:我在navigationcontroller中推送了一个类化的UIViewController。此UIViewController包含一个UIScrollView(在IB中创建)。在UIViewController viewDidLoad()函数中,我添加了一个背景PDF(在UIview层的CATiledLayer子层中) 问题是,当我从导航控制器弹出UIViewControll
@interface PlanViewController : UIViewController <UIScrollViewDelegate> {
UIScrollView *panelScrollView;
UIView *myContentView;
CGPDFDocumentRef myDocumentRef;
CGPDFPageRef myPageRef;
}
@property (nonatomic, retain) IBOutlet UIScrollView *panelScrollView;
@property (nonatomic, retain) UIView *myContentView;
@end
@implementation PlanViewController
@synthesize panelScrollView;
@synthesize myContentView;
- (void)viewDidLoad {
[self setTitle:@"Plan"];
myDocumentRef = CGPDFDocumentCreateWithURL((CFURLRef)[[NSBundle mainBundle] URLForResource:@"salonMap" withExtension:@"pdf"]);
myPageRef = CGPDFDocumentGetPage(myDocumentRef, 1);
CGRect pageRect = CGRectIntegral(CGPDFPageGetBoxRect(myPageRef, kCGPDFCropBox));
CATiledLayer *tiledLayer = [[CATiledLayer alloc] init];
[tiledLayer setDelegate:self];
[tiledLayer setTileSize:CGSizeMake(1024.0, 1024.0)];
[tiledLayer setLevelsOfDetail:4];
[tiledLayer setLevelsOfDetailBias:8];
[tiledLayer setFrame:pageRect];
UIView *newView = [[UIView alloc] initWithFrame:pageRect];
[newView.layer addSublayer:tiledLayer];
[newView setTag:555];
[self setMyContentView:newView];
[newView release];
[tiledLayer release];
[panelScrollView setDelegate:self];
[panelScrollView setContentSize:pageRect.size];
[panelScrollView setMaximumZoomScale:5];
[panelScrollView addSubview:myContentView];
[panelScrollView setClipsToBounds: YES];
[panelScrollView setMaximumZoomScale:20.0];
[panelScrollView setMinimumZoomScale:1.0];
[panelScrollView setZoomScale:1];
[self initPinsOnMap];
}
- (void)drawLayer:(CALayer *)layer inContext:(CGContextRef)ctx
{
CGContextSetRGBFillColor(ctx, 1.0, 1.0, 1.0, 1.0);
CGContextFillRect(ctx, CGContextGetClipBoundingBox(ctx));
CGContextTranslateCTM(ctx, 0.0, layer.bounds.size.height);
CGContextScaleCTM(ctx, 1.0, -1.0);
CGContextConcatCTM(ctx, CGPDFPageGetDrawingTransform(myPageRef, kCGPDFCropBox, layer.bounds, 0, true));
CGContextDrawPDFPage(ctx, myPageRef);
}
- (void)dealloc {
[panelScrollView release];
[myContentView release];
CGPDFDocumentRelease(myDocumentRef), myDocumentRef = NULL;
myPageRef = NULL;
[super dealloc];
}
@end
我想知道我做错了什么。我一定会遵守《内存管理指南》。我认为这个问题来自卡莱尔。我尝试在CALayer中使用和不使用pdf,但它没有任何改变
但无论我如何编码,它总是导致:
**-[PlanViewController isKindOfClass:]:消息发送到解除分配的实例0xc641750**
文书僵尸向我展示了一种超越:
88 PlanViewController僵尸-1 690954120 0x64a6a00 UIKit-[UIView(层次结构)\u makeSubtreePerformSelector:withObject:withObject:copySublayers:]
你有什么提示吗
非常感谢您的帮助解决了问题!!!也许这会有帮助: 实际上,异步重绘由CATiledLayer调用。当释放UIViewController时,您必须对CATiledLayer说,它的委托不再处于活动状态。我向CATiledLayer添加了一个引用(分配),并在我的dealloc函数中执行以下操作:
self.PDFTiledLayer.contents=nil;
self.PDFTiledLayer.delegate=nil;
[self.PDFTiledLayer removeFromSuperlayer];
我希望你不会失去我失去的那么多时间…解决了!!!self.PDFTiledLayer.contents=nil;self.PDFTiledLayer.delegate=nil;[self.PDFTiledLayer从SuperLayer移除];嘿-不要用答案编辑你的问题-在下面的框中实际回答;)来到法国巴黎:)我今天也有同样的问题。我独立地解决了这个问题,但后来我去寻找一些现有的答案,并找到了你的答案。人员:取消代理设置非常重要!这是一个非弧弱参考。
self.PDFTiledLayer.contents=nil;
self.PDFTiledLayer.delegate=nil;
[self.PDFTiledLayer removeFromSuperlayer];