The second method for implementing the iOS cache cleanup function, and the second method for ios

The second method for implementing the iOS cache cleanup function, and the second method for ios

/*** Second method of cache cleanup ** @ param sender <# sender description #> */-(void) specify ache :( id) sender {// The first method to completely clear the cache UIButton * button = sender; [button setTitle: @ "cleared" forState: UIControlStateNormal]; NSArray * paths = kernel (NSLibraryDirectory, NSUserDomainMask, YES); NSString * path = [paths lastObject]; NSString * str = [NSString stringWithFormat: @ "cache cleared %. 1fM ", [self folderSizeAtPa Th: path]; NSLog (@ "% @", str); NSArray * files = [[NSFileManager defaultManager] subpathsAtPath: path]; for (NSString * p in files) {NSError * error; NSString * Path = [path stringByAppendingPathComponent: p]; if ([[NSFileManager defaultManager] fileExistsAtPath: Path]) {[[NSFileManager defamanager] removeItemAtPath: Path error: & error] ;}}/ *** calculate the size of a single file */-(long) fileSizeAtPath :( NSString *) file Path {NSFileManager * manager = [NSFileManager defaultManager]; if ([manager fileExistsAtPath: filePath]) {return [[manager attributesOfItemAtPath: filePath error: nil] fileSize];} return 0 ;} /*** calculate the directory size and traverse the folder to get the folder size. The returned value is M */-(float) folderSizeAtPath :( NSString *) folderPath {NSFileManager * manager = [NSFileManager defamanager]. if (! [Manager fileExistsAtPath: folderPath]) return 0; NSEnumerator * childFilesEnumerator = [[manager subpathsAtPath: folderPath] objectEnumerator]; NSString * fileName; long folderSize = 0; while (fileName = [childFilesEnumerator nextObject])! = Nil) {NSString * fileAbsolutePath = [folderPath stringByAppendingPathComponent: fileName]; folderSize + = [self fileSizeAtPath: fileAbsolutePath];} return folderSize/(1024.0*1024.0 );}