//清除缓存        [self showAlertWithTitle:QHLocalizedString(@"确认清除缓存", nil) message:nil actions:@[QHLocalizedString(@"取消", nil), QHLocalizedString(@"确认", nil)] complete:^(NSInteger selIndex) {            if (selIndex == 1) {                //获取缓存图片的大小(字节)//                NSUInteger bytesCache = [[SDImageCache sharedImageCache] getSize];                //换算成 MB//                float MBCache = bytesCache/1000/1000;                //异步清除图片缓存 （磁盘中的）                dispatch_async(dispatch_get_global_queue(0, 0), ^{                    [[SDImageCache sharedImageCache] clearDisk];                                    });                                __weak typeof(self) weakSelf = self;                [[SDImageCache sharedImageCache] clearDiskOnCompletion:^{                    __strong typeof(weakSelf) strongSelf = weakSelf;                    [MBProgressHUD showMessag:QHLocalizedString(@"清除成功", nil) toView:strongSelf.view afterDelay:hiddenMBPTime];                }];                            }        }];