获得指向关键ios目录的引用

    //获得指向关键ios目录的引用    //获取包目录    NSString *bundlePath = [[NSBundle mainBundle]bundlePath];    //获取documents    NSString *documentDirectory = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) lastObject];    //获取Library    NSString *libraryDirectory = [NSSearchPathForDirectoriesInDomains(NSLibraryDirectory, NSUserDomainMask, YES)lastObject];    //获取Cathe    NSString *cacheDirectory = [NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES)lastObject];