Question

我正在尝试生成图表并逐个截取屏幕截图。该应用程序正常工作一次，然后当我第二次尝试再次捕获屏幕截图时，应用程序崩溃说应用程序因内存错误而终止。这只发生在iOS8而不是iOS7中。这里捕获屏幕截图的代码，它在线崩溃 - [view.layer renderInContext:context]; 应用程序在峰值使用时使用124 MB，并且在崩溃之前没有生成内存警告。即使没有其他应用程序在后台运行，应用程序也会在iOS 8上崩溃。如果我注释掉上面一行，那么应用程序根本不会崩溃，但截图不是完整的屏幕。

- (BOOL)captureView:(UIView *)view forGraph:(NSString *)graphName
{

BOOL isImageCpatured = NO;

@try {
    CGRect rect = view.bounds;
    UIGraphicsBeginImageContext(rect.size);
    CGContextRef context = UIGraphicsGetCurrentContext();
    [view.layer renderInContext:context];
    UIImage *img = UIGraphicsGetImageFromCurrentImageContext();
    UIGraphicsEndImageContext();

    CGImageRef imageRef;

    if (SYSTEM_VERSION_GREATER_THAN_OR_EQUAL_TO(@"7.0")) {
        imageRef = CGImageCreateWithImageInRect([img CGImage], CGRectMake(0, 113, 1024, 532));
    }
    else {
        imageRef = CGImageCreateWithImageInRect([img CGImage], CGRectMake(0, 93, 1024, 532));
    }

    img = nil;

    UIImage *image = [UIImage imageWithCGImage:imageRef];
    CGImageRelease(imageRef);        
    NSData *pngData = UIImagePNGRepresentation(image);

    [pngData writeToFile:[Utility_Class documentsPathForFileName:[NSString stringWithFormat:@"%@BG.png",graphName]] atomically:YES];

    pngData = nil;

    image = nil;

    isImageCpatured = YES;

}
@catch (NSException *exception) {
    return isImageCpatured;
}
@finally {

}

return isImageCpatured;
}

可能有什么不对？我无法找到任何解决方案。我发现内存压力与内存错误不同。但没有解决方法如何解决它。甚至在@autorelease池中调用captureView函数。

这是在iOS8上生成的未知崩溃日志。 iOS7它永远不会崩溃。

Incident Identifier: 24F29058-7D47-40B6-87B4-2183220DB55B
CrashReporter Key:   6079e634bf7aeebb0e4d9ea95336cb33b0fc49dd
Hardware Model:      iPad4,1
OS Version:          iPhone OS 8.0 (12A365)
Kernel Version:      Darwin Kernel Version 14.0.0: Tue Aug 19 15:09:47 PDT 2014; root:xnu-2783.1.72~8/RELEASE_ARM64_S5L8960X
Date:                2014-09-25 18:21:25 +0530
Time since snapshot: 88 ms
Free pages:                              2219
Active pages:                            96945
Inactive pages:                          48102
Speculative pages:                       314
Throttled pages:                         0
Purgeable pages:                         2
Wired pages:                             77304
File-backed pages:                       40758
Anonymous pages:                         104603
Compressions:                            1467794
Decompressions:                          158957
Compressor Size:                         24980
Uncompressed Pages in Compressor:        119797
Page Size:                               16384
Largest process: my application Name

Answer 1

这是由于CGImageCreateWithImageInRect的错误造成的。请参阅：http://openradar.appspot.com/radar?id=5780787475513344

来源：https://twitter.com/steipete/status/524224268952158208

由于内存错误，应用程序仅在iOS8上崩溃

1 个答案: