关于清理缓存的解决方案

第一：首先在AppDelegate添加两个方法

- (int)cacheSize;
-(void)clearCache;

 

#pragma makr -cacheSize

- (int)cacheSize {
    int imageChaheSize = [[SDImageCache sharedImageCache] getSize] + [[SDImageCache sharedImageCache] getMemorySize];
    
    int dataSize = 0;
    NSString* docPath = [NSHomeDirectory() stringByAppendingPathComponent: @"Documents"];
    NSDirectoryEnumerator *fileEnumerator = [[NSFileManager defaultManager] enumeratorAtPath:docPath];
    for (NSString *fileName in fileEnumerator)
    {
        NSString *filePath = [docPath stringByAppendingPathComponent:fileName];
        NSDictionary *attrs = [[NSFileManager defaultManager] attributesOfItemAtPath:filePath error:nil];
        dataSize += [attrs fileSize];
    }
    
    return imageChaheSize + dataSize;
}

-(void)clearCache {
    [[SDImageCache sharedImageCache] clearMemory];
    [[SDImageCache sharedImageCache] clearDisk];
    
    NSString* docPath = [NSHomeDirectory() stringByAppendingPathComponent: @"Documents"];
    NSDirectoryEnumerator *fileEnumerator = [[NSFileManager defaultManager] enumeratorAtPath:docPath];
    for (NSString *fileName in fileEnumerator)
    {
        NSString *filePath = [docPath stringByAppendingPathComponent:fileName];
        [[NSFileManager defaultManager] removeItemAtPath:filePath error:nil];
    }
    
}

第二：在要用到的地方调用

一般是在表格中使用

在cell中添加此代码

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {

　　cell.textLabel.text = @"清理缓存";
      UILabel *accessory = [[UILabel alloc] init];
      accessory.backgroundColor = [UIColor clearColor];
      accessory.textAlignment = UITextAlignmentCenter;
      accessoryView.text = [NSString stringWithFormat:@"%.1fMB", [AppDelegate appDelegate].cacheSize/1024.0/1024.0];
       cell.accessoryView = accessory;

}

最后一步，点击清理缓存

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {

　　if ([AppDelegate appDelegate].cacheSize > 0) {
                [[AppDelegate appDelegate] clearCache];

　　　　　　UIAlertView *alert = [[UIAlertView alloc]initWithTitle:@"清理缓存" message:@"清理成功！" delegate:self cancelButtonTitle:@"OK" otherButtonTitles:nil, nil];
                [alert show];　　
                [_tableView reloadData];//刷新表格
       } else {
                UIAlertView *alert = [[UIAlertView alloc]initWithTitle:@"清理缓存" message:@"没有缓存" delegate:self cancelButtonTitle:@"OK" otherButtonTitles:nil, nil];
                [alert show];
       }

}