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  • 清理缓存的 方式

    // 显示缓存大小

    -( float )filePath

    {

        

        NSString * cachPath = [ NSSearchPathForDirectoriesInDomains ( NSCachesDirectory , NSUserDomainMask , YES ) firstObject ];

        

        return [ self folderSizeAtPath :cachPath];

        

    }

    //1:首先我们计算一下 单个文件的大小

    - ( long long ) fileSizeAtPath:( NSString *) filePath{

        

        NSFileManager * manager = [ NSFileManager defaultManager ];

        

        if ([manager fileExistsAtPath :filePath]){

            

            return [[manager attributesOfItemAtPath :filePath error : nil ] fileSize ];

        }

        

        return 0 ;

        

    }

    //2:遍历文件夹获得文件夹大小,返回多少 M(提示:你可以在工程界设置()m)

    - ( float ) folderSizeAtPath:( NSString *) folderPath{

        

        NSFileManager * manager = [ NSFileManager defaultManager ];

        

        if (![manager fileExistsAtPath :folderPath]) return 0 ;

        

        NSEnumerator *childFilesEnumerator = [[manager subpathsAtPath :folderPath] objectEnumerator ];

        

        NSString * fileName;

        

        long long folderSize = 0 ;

        

        while ((fileName = [childFilesEnumerator nextObject ]) != nil ){

            

            NSString * fileAbsolutePath = [folderPath stringByAppendingPathComponent :fileName];

            

            folderSize += [ self fileSizeAtPath :fileAbsolutePath];

            

        }

        

        return folderSize/( 1024.0 * 1024.0 );

        

    }

    // 清理缓存

    - (void)clearFile

    {

        NSString * cachPath = [ NSSearchPathForDirectoriesInDomains ( NSCachesDirectory , NSUserDomainMask ,YES ) firstObject ];

        

        NSArray * files = [[ NSFileManager defaultManager ] subpathsAtPath :cachPath];

        

        NSLog ( @"cachpath = %@" , cachPath);

        

        for ( NSString * p in files) {

            

            NSError * error = nil ;

            

            NSString * path = [cachPath stringByAppendingPathComponent :p];

            

            if ([[ NSFileManager defaultManager ] fileExistsAtPath :path]) {

                

                [[ NSFileManager defaultManager ] removeItemAtPath :path error :&error];

                

            }

            

        }

        

        [ self performSelectorOnMainThread : @selector (clearCachSuccess) withObject : nil waitUntilDone : YES ];

        

    }

    -(void)clearCachSuccess

    {

        NSLog ( @" 清理成功 " );

        

        NSIndexPath *index=[NSIndexPath indexPathForRow:0 inSection:0];//刷新

        [_tableView reloadRowsAtIndexPaths:[NSArray arrayWithObjects:index,nil] withRowAnimation:UITableViewRowAnimationNone];

     }

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  • 原文地址:https://www.cnblogs.com/yecong/p/6164948.html
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