小编Xab*_*bal的帖子

我正在开发一个Xcode应用程序,需要ogg和vorbis框架来播放ogg文件.我已经搜索了有关此的一些信息,但我没有达到任何意义,我不知道如何使这个框架工作.我已经下载了这些库并将它们添加到我的项目中,但即使文件已经存在,我仍然没有得到它编译它抱怨丢失文件.

谁能指点我一本关于如何实现这个目标的好手册？

任何帮助赞赏.

我正在开发一个应用程序,它读取图像的地理位置,并允许用户修改此信息并将此数据写回.我使用writeImageDataToSavedPhotosAlbum函数成功读取数据,操作并写入库.问题是,相反更新原始图像,它会创建一个新图像.

我怎么能更换或更新该项目？

[...]

NSMutableDictionary *EXIFDictionary = [[[metadata objectForKey:(NSString *)kCGImagePropertyExifDictionary]mutableCopy]autorelease];
NSMutableDictionary *GPSDictionary  = [[[metadata objectForKey:(NSString *)kCGImagePropertyGPSDictionary]mutableCopy]autorelease];
NSMutableDictionary *TIFFDictionray = [[[metadata objectForKey:(NSString *)kCGImagePropertyTIFFDictionary]mutableCopy]autorelease];

Byte *buffer = (Byte*)malloc(representation.size);
NSUInteger buffered = [representation getBytes:buffer fromOffset:0.0 length:representation.size error:nil];
NSData *imageData = [NSData dataWithBytesNoCopy:buffer length:buffered freeWhenDone:YES]; //this is NSData may be what you want

if(!EXIFDictionary) {
    //if the image does not have an EXIF dictionary (not all images do), then create one for us to use
    EXIFDictionary = [NSMutableDictionary dictionary];
}
if(!GPSDictionary) {
    GPSDictionary = [NSMutableDictionary …