我有CFDataRef
,我想把它转换成NSData
。
CGDataProviderRef dataProvider = CGImageGetDataProvider(screenShot);
CFDataRef data = CGDataProviderCopyData(dataProvider);
CGDataProviderRelease(dataProvider);
NSString *imagePathLocation = [destinationPath stringByAppendingString:[@"/" stringByAppendingString:DesktopImage]];
[[NSFileManager defaultManager]createFileAtPath: imagePathLocation contents:nil attributes:nil];
fileHandleForImage = [NSFileHandle fileHandleForWritingAtPath:imagePathLocation];
NSData * data1 = (NSData *)data;
[fileHandleForImage writeData:data1];
当我键入类型转换(NSData * data1 = (NSData *)data
)时,它的图像被损坏。
有人能帮上忙吗?
发布于 2010-09-27 15:11:37
它是免费桥接的,所以你只需要铸造它。
NSData *myData = (__bridge NSData *)myCFDataRef;
发布于 2012-08-05 01:54:30
正如@KrisMarkel所说,你只需要像这样将所有权转移到ARC:
就像这样来转移所有权:
NSData* data1 = (__bridge_transfer NSData*) data;
否则,在不转移所有权的情况下使用引用:
NSData* data2 = (__bridge NSData*) data;
https://stackoverflow.com/questions/3801706
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