iOS10 相册图片二维码识别
#1、问题描述：
在iOS8，iOS9下，打开相册里的图片识别二维码功能正常，但在iOS10下，该功能失效。
打开相册代码：
- (void)openImagePicker {
UIImagePickerControllerSourceType sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
if (![UIImagePickerController isSourceTypeAvailable: UIImagePickerControllerSourceTypeCamera]) {
sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
}
UIImagePickerController *pickerVC = [[UIImagePickerController alloc] init];
pickerVC.delegate = self;
pickerVC.allowsEditing = NO;
pickerVC.sourceType = sourceType;
[self presentViewController:pickerVC animated:YES completion:nil];
}
识别二维码：
+ (NSString *)readQRCodeImage:(UIImage *)imagePicked {
CIImage *qrcodeImage = [CIImage imageWithCGImage:imagePicked.CGImage];
CIContext *qrcodeContext = [CIContext contextWithOptions:nil];
//检测图片中的二维码，并设置检测精度为高
CIDetector *qrcodeDetector = [CIDetector detectorOfType:CIDetectorTypeQRCode context:qrcodeContext options:@{CIDetectorAccuracy:CIDetectorAccuracyHigh}];
//读取图片的qrcode特性
NSArray *qrcodeFeatures = [qrcodeDetector featuresInImage:qrcodeImage];
//返回的结果，只读取一条
NSString *qrcodeResultString = nil;
if (qrcodeFeatures && qrcodeFeatures.count > 0) {
for (CIQRCodeFeature *qrcodeFeature in qrcodeFeatures) {
if (qrcodeResultString && qrcodeResultString.length > 0) {
break;
}
qrcodeResultString = qrcodeFeature.messageString;
}
}
NSLog(@"%@",qrcodeResultString);
return qrcodeResultString;
}
在iOS10下提示错误：
[qrcodeDetector featuresInImage:qrcodeImage]；
解决办法：设置相册图片为可编辑属性，即可解决此问题
pickerVC.allowsEditing = Yes;
#2.iOS10下相关权限适配：
在Info.plist中添加字段
Privacy - Camera Usage Description 打开相机 Privacy - Photo Library Usage Description 打开相册
