MBProgressHUD上传照片进度提示

@property (strong, nonatomic) MBProgressHUD *HUD;

- (void)hudTipWillShow:(BOOL)willShow{
    if (willShow) {
        [self resignFirstResponder];
        UIWindow *keyWindow = [UIApplication sharedApplication].keyWindow;
        if (!_HUD) {
            _HUD = [MBProgressHUD showHUDAddedTo:keyWindow animated:YES];
            _HUD.mode = MBProgressHUDModeDeterminateHorizontalBar;
            _HUD.labelText = @"正在上传图片...";
            _HUD.removeFromSuperViewOnHide = YES;
        }else{
            _HUD.progress = 0;
            [keyWindow addSubview:_HUD];
            [_HUD show:YES];
        }
    }else{
        [_HUD hide:YES];
    }
}

    [self hudTipWillShow:YES];

if (self.HUD) {
            self.HUD.progress = progress;// progress是回调进度        
}

[self hudTipWillShow:NO];