iOS在应用程序里面创建问件夹

 NSString *path = [NSHomeDirectory() stringByAppendingPathComponent:@"Documents/ImageCache"];//要创建文件夹的路径

 BOOL createSuccess = [[NSFileManager defaultManager]createDirectoryAtPath:path withIntermediateDirectories:YES attributes:nil error:nil];//创建文件夹

NSAssert(createSuccess, @"创建fail");