Objective-C Language NSURL Modifying and Converting a File URL with removing and appending path
Example
1. URLByDeletingPathExtension:
If the receiver represents the root path, this property contains a copy of the original URL. If the URL has multiple path extensions, only the last one is removed.
2. URLByAppendingPathExtension:
Returns a new URL made by appending a path extension to the original URL.
Example:
NSUInteger count = 0;
NSString *filePath = nil;
do {
NSString *extension = ( NSString *)UTTypeCopyPreferredTagWithClass(( CFStringRef)AVFileTypeQuickTimeMovie, kUTTagClassFilenameExtension);
NSString *fileNameNoExtension = [[asset.defaultRepresentation.url URLByDeletingPathExtension] lastPathComponent];//Delete is used
NSString *fileName = [NSString stringWithFormat:@"%@-%@-%u",fileNameNoExtension , AVAssetExportPresetLowQuality, count];
filePath = NSTemporaryDirectory();
filePath = [filePath stringByAppendingPathComponent:fileName];//Appending is used
filePath = [filePath stringByAppendingPathExtension:extension];
count++;
} while ([[NSFileManager defaultManager] fileExistsAtPath:filePath]);
NSURL *outputURL = [NSURL fileURLWithPath:filePath];
