IOS中计算缓存文件的大小判断实例详解
IOS中计算缓存文件的大小判断,在这里分享一下自己的心得,希望和大家一起分享技术,如果有什么不足,还请大家指正。写出这篇目的,就是希望大家一起成长,我也相信技术之间没有高低,只有互补,只有分享,才能使彼此更加成长。
实例代码:
//获取缓存文件路径 -(NSString *)getCachesPath{ // 获取Caches目录路径 NSArray *paths = NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask,YES); NSString *cachesDir = [paths objectAtIndex:0]; NSString *filePath = [cachesDir stringByAppendingPathComponent:@"com.nickcheng.NCMusicEngine"]; return filePath; } ///计算缓存文件的大小的M - (long long) fileSizeAtPath:(NSString*) filePath{ NSFileManager* manager = [NSFileManager defaultManager]; if ([manager fileExistsAtPath:filePath]){ // //取得一个目录下得所有文件名 // NSArray *files = [manager subpathsAtPath:filePath]; // NSLog(@"files1111111%@ == %ld",files,files.count); // // // 从路径中获得完整的文件名(带后缀) // NSString *exe = [filePath lastPathComponent]; // NSLog(@"exeexe ====%@",exe); // // // 获得文件名(不带后缀) // exe = [exe stringByDeletingPathExtension]; // // // 获得文件名(不带后缀) // NSString *exestr = [[files objectAtIndex:1] stringByDeletingPathExtension]; // NSLog(@"files2222222%@ ==== %@",[files objectAtIndex:1],exestr); return [[manager attributesOfItemAtPath:filePath error:nil] fileSize]; } return 0; } - (float ) folderSizeAtPath:(NSString*) folderPath{ NSFileManager* manager = [NSFileManager defaultManager]; if (![manager fileExistsAtPath:folderPath]) return 0; NSEnumerator *childFilesEnumerator = [[manager subpathsAtPath:folderPath] objectEnumerator];//从前向后枚举器////// NSString* fileName; long long folderSize = 0; while ((fileName = [childFilesEnumerator nextObject]) != nil){ NSLog(@"fileName ==== %@",fileName); NSString* fileAbsolutePath = [folderPath stringByAppendingPathComponent:fileName]; NSLog(@"fileAbsolutePath ==== %@",fileAbsolutePath); folderSize += [self fileSizeAtPath:fileAbsolutePath]; } NSLog(@"folderSize ==== %lld",folderSize); return folderSize/(1024.0*1024.0); } //////////// -(void)ss{ // 获取Caches目录路径 NSArray *paths = NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask,YES); NSString *cachesDir = [paths objectAtIndex:0]; NSLog(@"cachesDircachesDir == %@",cachesDir); //读取缓存里面的具体单个文件/或全部文件// NSString *filePath = [cachesDir stringByAppendingPathComponent:@"com.nickcheng.NCMusicEngine"]; NSArray *array = [[NSArray alloc]initWithContentsOfFile:filePath]; NSLog(@"filePathfilePath%@ ==array==== %@",filePath, array); NSFileManager* fm=[NSFileManager defaultManager]; if([fm fileExistsAtPath:filePath]){ //取得一个目录下得所有文件名 NSArray *files = [fm subpathsAtPath:filePath]; NSLog(@"files1111111%@ == %ld",files,files.count); // 获得文件名(不带后缀) NSString * exestr = [[files objectAtIndex:1] stringByDeletingPathExtension]; NSLog(@"files2222222%@ ==== %@",[files objectAtIndex:1],exestr); } }
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