UIImagePickerControllerEditedImage]; if (!image) { image = info[UIImagePickerControllerOriginalImage]; } //初始化 將類型設(shè)置為二維碼 CIDetector *detector = [CIDetector detectorOfType:CIDetectorTypeQRCode context:nil options:nil]; [picker dismissViewControllerAnimated:YES completion:^{ //設(shè)置數(shù)組，放置識別完之后的數(shù)據(jù) NSArray *features = [detector featuresInImage:[CIImage imageWithData:UIImagePNGRepresentation(image)]]; //判斷是否有數(shù)據(jù)（即是否是二維碼） if (features.count >= 1) { //取第一個元素就是二維碼所存放的文本信息 CIQRCodeFeature *feature = features[0]; NSString *scannedResult = feature.messageString; //通過對話框的形式呈現(xiàn) [self alertControllerMessage:scannedResult]; }else{ [self alertControllerMessage:@"這不是一個二維碼"]; } }];}//由于要寫兩次，所以就封裝了一個方法-(void)alertControllerMessage:(NSString *)message{ UIAlertController *alert = [UIAlertController alertControllerWithTitle:@"" message:message preferredStyle:UIAlertControllerStyleAlert]; UIAlertAction *action = [UIAlertAction actionWithTitle:@"cancel" style:UIAlertActionStyleCancel handler:^(UIAlertAction * _Nonnull action) { }]; [alert addAction:action]; [self presentViewController:alert animated:YES completion:nil];}

 2/3   首頁 上一頁 1 2 3 下一頁 尾頁