iOS 實現微信掃一掃樣式

-(void)loopDrawLine

{

   CGRect  rect= CGRectMake(0,50, 320, 2);

   if (readLineView) {

    [readLineView removeFromSuperview];

  }

   readLineView = [[UIImageView alloc]initWithFrame:rect];

   readLineView.backgroundColor =[UIColor redColor];

    [UIViewanimateWithDuration:3.0

               delay: 0.0

              options:UIViewAnimationOptionCurveEaseIn

             animations:^{

//修改fream的代碼寫在這里

               readLineView.frame =CGRectMake(0, 300,320, 2);

               [readLineView setAnimationRepeatCount:0];

             }

             completion:^(BOOL finished){

               if(!is_Anmotion) {

                [self loopDrawLine]; 

               }

             }];

    if (!is_have) {

       UIImage *hbImage=[UIImage imageNamed:@"DecodeFrameForeground.png"];

       UIImageView *hbImageview=[[UIImageView alloc] initWithImage:hbImage];

       //添加一個背景圖片

       CGRect hbImagerect=CGRectMake(0, 0,320, 435);

      [hbImageview setFrame:hbImagerect];

      ZBarReaderView *readview = [ZBarReaderView new];

      readview.backgroundColor= [UIColor clearColor];

      readview.frame= CGRectMake(0, 0, 320, 380);

       readview.readerDelegate = self;

       readview.allowsPinchZoom = YES;//使用手勢變焦

      readview.trackingColor =[UIColor redColor];

      readview.showsFPS = YES;//顯示幀率 YES 顯示 NO不顯示

      readview.scanCrop = CGRectMake(0, 0,1, 1);//將被掃描的圖像的區域

      [readview addSubview:hbImageview];

      [readview addSubview:readLineView];

      [self.view addSubview:readview];

      [readview start];

       is_have = YES;

    }

    [self.view addSubview:readLineView];

}

[readerViewremoveFromSuperview];