正如标题所示，我遇到臭名昭着的rederInContext崩溃问题。我在线阅读了很多帖子，但似乎没有人提出如何解决这个问题以及任何对我有用的事情。
让我们从已经考虑过的常见错误开始。我正在使用@autorelease{ code }而我没有收到任何内存警告问题。我也试过在主线程上执行，也没用。当视图到达语句时，它们的所有层都不为null。我有NSLogged他们，他们都不是null。我尝试了一些不同的代码，并发布了与它们对应的错误。
学尝试＃1
-(void){
@autorelease{
//UIGraphicsBeginImageContext(self.mapView.bounds);
UIGraphicsBeginImageContextWithOptions(self.mapView.bounds, NO, 0.0);
CGContextRef c = UIGraphicsGetCurrentContext();
CGContextTranslateCTM(c, 0, 0);
[self.mapView.layer renderInContext:c]; //Crashes HERE :(
UIImage* viewImage = UIGraphicsGetImageFromCurrentImageContext();
viewImage = [viewImage applyBlurWithRadius:4.0f tintColor:[UIColor colorWithWhite:0.2 alpha:0.55] saturationDeltaFactor:1.0 maskImage:nil];
UIGraphicsEndImageContext();
UIImageView *newView = [[UIImageView alloc] initWithFrame:self.mapView.frame];
newView.backgroundColor = [UIColor clearColor];
newView.image = viewImage;
newView.tag = 10;
newView.alpha = 0.1;
[self.mapView addSubview:newView];
self.mapView.userInteractionEnabled = NO;
[UIView animateWithDuration:0.15 delay:0.0 options:UIViewAnimationOptionCurveLinear animations:^{ newView.alpha = 1.0;} completion:^(BOOL finished){}];
}
}
// ** ERROR MESSAGES **
<Error>: CGImageCreate: invalid image width.
<Error>: CGContextSaveGState: invalid context 0x1e432510. This is a serious error. This application, or a library it uses, is using an invalid context and is thereby contributing to an overall degradation of system stability and reliability. This notice is a courtesy: please fix this problem. It will become a fatal error in an upcoming update.
<Error>: CGContextClipToRect: invalid context 0x1e432510. This is a serious error. This application, or a library it uses, is using an invalid context and is thereby contributing to an overall degradation of system stability and reliability. This notice is a courtesy: please fix this problem. It will become a fatal error in an upcoming update.
<Error>: CGContextSaveGState: invalid context 0x1e432510. This is a serious error. This application, or a library it uses, is using an invalid context and is thereby contributing to an overall degradation of system stability and reliability. This notice is a courtesy: please fix this problem. It will become a fatal error in an upcoming update.
<Error>: CGContextSaveGState: invalid context 0x1e432510. This is a serious error. This application, or a library it uses, is using an invalid context and is thereby contributing to an overall degradation of system stability and reliability. This notice is a courtesy: please fix this problem. It will become a fatal error in an upcoming update.
<Error>: CGContextSetFillColorWithColor: invalid context 0x1e432510. This is a serious error. This application, or a library it uses, is using an invalid context and is thereby contributing to an overall degradation of system stability and reliability. This notice is a courtesy: please fix this problem. It will become a fatal error in an upcoming update.
<Error>: CGContextAddRect: invalid context 0x1e432510. This is a serious error. This application, or a library it uses, is using an invalid context and is thereby contributing to an overall degradation of system stability and reliability. This notice is a courtesy: please fix this problem. It will become a fatal error in an upcoming update.
<Error>: CGContextDrawPath: invalid context 0x1e432510. This is a serious error. This application, or a library it uses, is using an invalid context and is thereby contributing to an overall degradation of system stability and reliability. This notice is a courtesy: please fix this problem. It will become a fatal error in an upcoming update.
<Error>: CGContextRestoreGState: invalid context 0x1e432510. This is a serious error. This application, or a library it uses, is using an invalid context and is thereby contributing to an overall degradation of system stability and reliability. This notice is a courtesy: please fix this problem. It will become a fatal error in an upcoming update.
<Error>: CGContextSaveGState: invalid context 0x1e432510. This is a serious error. This application, or a library it uses, is using an invalid context and is thereby contributing to an overall degradation of system stability and reliability. This notice is a courtesy: please fix this problem. It will become a fatal error in an upcoming update.
<Error>: CGContextGetBaseCTM: invalid context 0x1e432510. This is a serious error. This application, or a library it uses, is using an invalid context and is thereby contributing to an overall degradation of system stability and reliability. This notice is a courtesy: please fix this problem. It will become a fatal error in an upcoming update.
<Error>: CGContextConcatCTM: invalid context 0x1e432510. This is a serious error. This application, or a library it uses, is using an invalid context and is thereby contributing to an overall degradation of system stability and reliability. This notice is a courtesy: please fix this problem. It will become a fatal error in an upcoming update.
<Error>: CGContextSetBaseCTM: invalid context 0x1e432510. This is a serious error. This application, or a library it uses, is using an invalid context and is thereby contributing to an overall degradation of system stability and reliability. This notice is a courtesy: please fix this problem. It will become a fatal error in an upcoming update.
<Error>: CGContextSaveGState: invalid context 0x1e432510. This is a serious error. This application, or a library it uses, is using an invalid context and is thereby contributing to an overall degradation of system stability and reliability. This notice is a courtesy: please fix this problem. It will become a fatal error in an upcoming update.
<Error>: CGContextSaveGState: invalid context 0x1e432510. This is a serious error. This application, or a library it uses, is using an invalid context and is thereby contributing to an overall degradation of system stability and reliability. This notice is a courtesy: please fix this problem. It will become a fatal error in an upcoming update.
<Error>: CGContextClipToRect: invalid context 0x1e432510. This is a serious error. This application, or a library it uses, is using an invalid context and is thereby contributing to an overall degradation of system stability and reliability. This notice is a courtesy: please fix this problem. It will become a fatal error in an upcoming update.
<Error>: CGContextBeginTransparencyLayerWithRect: invalid context 0x1e432510. This is a serious error. This application, or a library it uses, is using an invalid context and is thereby contributing to an overall degradation of system stability and reliability. This notice is a courtesy: please fix this problem. It will become a fatal error in an upcoming update.
<Error>: CGContextSetFillColorSpace: invalid context 0x1e432510. This is a serious error. This application, or a library it uses, is using an invalid context and is thereby contributing to an overall degradation of system stability and reliability. This notice is a courtesy: please fix this problem. It will become a fatal error in an upcoming update.
<Error>: CGContextSetStrokeColorSpace: invalid context 0x1e432510. This is a serious error. This application, or a library it uses, is using an invalid context and is thereby contributing to an overall degradation of system stability and reliability. This notice is a courtesy: please fix this problem. It will become a fatal error in an upcoming update.
*** -[Not A Type retain]: message sent to deallocated instance 0x1e432510
尝试＃2 - 调用mainThread
-(void)blurrEffect{
[self performSelectorOnMainThread:@selector(captureBlur) withObject:nil waitUntilDone:YES];
}
-(void)captureBlur
{
@autorelease{
//UIGraphicsBeginImageContext(self.mapView.bounds);
UIGraphicsBeginImageContextWithOptions(self.mapView.bounds, NO, 0.0);
CGContextRef c = UIGraphicsGetCurrentContext();
CGContextTranslateCTM(c, 0, 0);
[self.mapView.layer renderInContext:c]; //Crashes HERE :(
UIImage* viewImage = UIGraphicsGetImageFromCurrentImageContext();
viewImage = [viewImage applyBlurWithRadius:4.0f tintColor:[UIColor colorWithWhite:0.2 alpha:0.55] saturationDeltaFactor:1.0 maskImage:nil];
UIGraphicsEndImageContext();
UIImageView *newView = [[UIImageView alloc] initWithFrame:self.mapView.frame];
newView.backgroundColor = [UIColor clearColor];
newView.image = viewImage;
newView.tag = 10;
newView.alpha = 0.1;
[self.mapView addSubview:newView];
self.mapView.userInteractionEnabled = NO;
[UIView animateWithDuration:0.15 delay:0.0 options:UIViewAnimationOptionCurveLinear animations:^{ newView.alpha = 1.0;} completion:^(BOOL finished){}];
}
}
// **ERROR MESSAGE**
malloc: *** mmap(size=1923772416) failed (error code=12)
*** error: can't allocate region
*** set a breakpoint in malloc_error_break to debug
libc++abi.dylib: terminating with uncaught exception of type std::bad_alloc: std::bad_alloc
尝试＃3
-(void)blurEffect{
[self performSelector:@selector(captureBlur) withObject:nil afterDelay:0.5];
}
-(void)captureblur{
@autorelease{
//UIGraphicsBeginImageContext(self.mapView.bounds);
UIGraphicsBeginImageContextWithOptions(self.mapView.bounds, NO, 0.0);
CGContextRef c = UIGraphicsGetCurrentContext();
CGContextTranslateCTM(c, 0, 0);
[self.mapView.layer renderInContext:c]; //Crashes HERE :(
UIImage* viewImage = UIGraphicsGetImageFromCurrentImageContext();
viewImage = [viewImage applyBlurWithRadius:4.0f tintColor:[UIColor colorWithWhite:0.2 alpha:0.55] saturationDeltaFactor:1.0 maskImage:nil];
UIGraphicsEndImageContext();
UIImageView *newView = [[UIImageView alloc] initWithFrame:self.mapView.frame];
newView.backgroundColor = [UIColor clearColor];
newView.image = viewImage;
newView.tag = 10;
newView.alpha = 0.1;
[self.mapView addSubview:newView];
self.mapView.userInteractionEnabled = NO;
[UIView animateWithDuration:0.15 delay:0.0 options:UIViewAnimationOptionCurveLinear animations:^{ newView.alpha = 1.0;} completion:^(BOOL finished){}];
}
}
// **ERROR MESSAGE**
terminating with uncaught exception of type std::bad_alloc: std::bad_alloc
我也尝试使用已经在stackoverflow上发布的FXBlurView切换自动释放代码。该代码库也使用renderInContext并在同一地点崩溃。
任何人都有任何想法或解决方案，为什么这是打破以及如何解决它？任何指导或信息都有帮助！提前谢谢！
PS：如果我只支持iOS7，我可以使用UIToolbar，但模糊效果看起来很糟糕我正在使用它，我也支持iOS6，所以这是不可能的。 修改：添加了UIGraphicsBeginImageContextWithOptions(self.mapView.bounds.size, NO, 0.0);，并尝试在没有CGContextTranslateCTM的情况下运行代码。仍然坠毁。