应用程序在图像捕获中崩溃

Posted 2023-03-08

【中文标题】应用程序在图像捕获中崩溃

【英文标题】：App crash in image capturing

【发布时间】：2014-03-14 12:55:32

【问题描述】：

我在应用程序中捕获图像，我的应用程序收到内存警告和应用程序崩溃 以下是正在使用的代码...请帮助。 这个应用程序就像从图库中挑选图像并为它们添加动画。在动画运行时将捕获图像并将它们制作成视频。

在制作动画时捕捉图像时出现内存警告..

-(void)captureImage:(NSTimer*) t 
NSLog(@"captureImage");


// Create a graphics context with the target size
// On ios 4 and later, use UIGraphicsBeginImageContextWithOptions to take the scale into  consideration
// On iOS prior to 4, fall back to use UIGraphicsBeginImageContext
CGSize imageSize = CGSizeZero;

UIInterfaceOrientation orientation = 
[UIApplication    sharedApplication].statusBarOrientation;
if (UIInterfaceOrientationIsPortrait(orientation)) 
    imageSize = [UIScreen mainScreen].bounds.size;
    NSLog(@"imageSize:%@  ",NSStringFromCGSize(imageSize));
 else 
    imageSize = 
 CGSizeMake([UIScreen mainScreen].bounds.size.height, 
 [UIScreen mainScreen].bounds.size.width);
//CGSizeMake(animatedImgView.frame.size.width, animatedImgView.frame.size.height);//


UIGraphicsBeginImageContextWithOptions(imageSize, NO, 0);
CGContextRef context = UIGraphicsGetCurrentContext();
for (UIWindow *window in [[UIApplication sharedApplication] windows]) 


    CGContextSaveGState(context);
    CGContextTranslateCTM(context, window.center.x, window.center.y);
    CGContextConcatCTM(context, window.transform);
    CGContextTranslateCTM(context,
  -window.bounds.size.width * window.layer.anchorPoint.x, 
 -window.bounds.size.height * window.layer.anchorPoint.y);
    if (orientation == UIInterfaceOrientationLandscapeLeft) 
        CGContextRotateCTM(context, M_PI_2);
        CGContextTranslateCTM(context, 0, -imageSize.width);
     else if (orientation == UIInterfaceOrientationLandscapeRight) 
        CGContextRotateCTM(context, -M_PI_2);
        CGContextTranslateCTM(context, -imageSize.height, 0);
     else if (orientation == UIInterfaceOrientationPortraitUpsideDown) 
        CGContextRotateCTM(context, M_PI);
        CGContextTranslateCTM(context, -imageSize.width, -imageSize.height);
    
    if 
([window
respondsToSelector:@selector(drawViewHierarchyInRect:afterScreenUpdates:)])     
         [window drawViewHierarchyInRect:window.bounds afterScreenUpdates:NO];
        //[animatedImgView drawViewHierarchyInRect:window.bounds afterScreenUpdates:NO];
     else 

        //[window.layer.presentationLayer renderInContext:context];
    
    CGContextRestoreGState(context);
    


 //   @autoreleasepool 
    UIImage *image = UIGraphicsGetImageFromCurrentImageContext();
    UIGraphicsEndImageContext();
    [savedImages addObject:image];
    image = nil;
 //  

  

感谢您的帮助...

【参考方案1】：

我认为将图像设置为零是不够的。看： The following graphical code tagged as Leak by iOS ARC

导致异常的另一个原因可能是内存中有很多图像。它们存储在哪里？文件系统？数据库？内存？