iOS清除所有缓存

作者: ihs | 来源:发表于2017-07-26 16:22 被阅读117次

    计算缓存

    NSString *libPath = NSSearchPathForDirectoriesInDomains(NSLibraryDirectory, NSUserDomainMask, YES)[0];
    CGFloat fileSize=[self folderSizeAtPath:libPath];
    - (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);
    }
    - (long long)fileSizeAtPath:(NSString*) filePath{
        NSFileManager* manager = [NSFileManager defaultManager];
        if ([manager fileExistsAtPath:filePath]){
            return [[manager attributesOfItemAtPath:filePath error:nil] fileSize];
        }
        return 0;
    }
    
    

    清除缓存

    - (void)action:(id)sender
    {
        NSArray *paths = NSSearchPathForDirectoriesInDomains(NSLibraryDirectory, NSUserDomainMask, YES);
        NSString *path = [paths lastObject];
        
        NSArray *files = [[NSFileManager defaultManager] subpathsAtPath:path];
        
        for (NSString *p in files) {
            NSError *error;
            NSString *Path = [path stringByAppendingPathComponent:p];
            if ([[NSFileManager defaultManager] fileExistsAtPath:Path]) {
                //清理缓存,保留Preference,里面含有NSUserDefaults保存的信息
                if (![Path containsString:@"Preferences"]) {
                    [[NSFileManager defaultManager] removeItemAtPath:Path error:&error];
                }
            }else{
                
            }
        }
    }
    
    

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