ios - 创建 GIF 在 iOS 7 上工作,在 iOS 8 上中断
<p><p>我有一些相当简单的代码,可以从一组 UIImage 中创建 GIF 图像。
它在 iOS7 上运行良好。在 iOS8 上创建了一个文件,但它以某种方式损坏(在设备上或下载到桌面时不起作用)。下面是示例代码:</p>
<pre><code>...
float frameTime = (1/(fps * speed));
NSString *fileOutput = ;
CGImageDestinationRef destination = CGImageDestinationCreateWithURL((__bridge CFURLRef),kUTTypeGIF,,NULL);
NSDictionary *frameProperties = forKey:(NSString *)kCGImagePropertyGIFDelayTime],(NSString *)kCGImagePropertyGIFDictionary,kCFBooleanFalse,kCGImagePropertyHasAlpha,,kCGImageDestinationLossyCompressionQuality, nil];
NSMutableDictionary *gifProps = ;
forKey:(NSString *)kCGImagePropertyGIFHasGlobalColorMap];
forKey:(NSString*)kCGImagePropertyGIFLoopCount];
forKey:(NSString *)kCGImagePropertyHasAlpha];
forKey:(NSString*)kCGImageDestinationLossyCompressionQuality];
NSDictionary *gifProperties = [ NSDictionary dictionaryWithObject:gifProps forKey:(NSString*) kCGImagePropertyGIFDictionary ];
for (int i = 0; i<; i++)
{
UIImage *im = ];
@autoreleasepool
{
CGImageDestinationAddImage(destination, im.CGImage, (__bridge CFDictionaryRef)frameProperties);
im = nil;
}
}
CGImageDestinationSetProperties(destination, (__bridge CFDictionaryRef)gifProperties);
CGImageDestinationFinalize(destination);
CFRelease(destination);
...
</code></pre>
<p>没有警告消息,执行时也没有错误。
什么可能导致问题?</p></p>
<br><hr><h1><strong>Best Answer-推荐答案</ strong></h1><br>
<p><p>Apple 确认这是一个 iOS8 错误,已提交 (18512475)。</p></p>
<p style="font-size: 20px;">关于ios - 创建 GIF 在 iOS 7 上工作,在 iOS 8 上中断,我们在Stack Overflow上找到一个类似的问题:
<a href="https://stackoverflow.com/questions/26060699/" rel="noreferrer noopener nofollow" style="color: red;">
https://stackoverflow.com/questions/26060699/
</a>
</p>
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