ios-获取相册相机图片

ios-获取相册相机图片

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前篇

• 隐私信息 info.plist 配置: https://stackoverflow.com/questions/39465687/nscamerausagedescription-in-ios-10-0-runtime-crash
• iOS关于相机相册权限设置 - https://www.jianshu.com/p/84df2ca84ade
• iOS 获取图片（拍照、相册、图库）详解 - https://www.jianshu.com/p/39a6a104d3c1
• iOS 拍照(相机)/相册获取图片 - https://www.jianshu.com/p/5465e87d8a0a
• iOS关于相机相册权限设置 - https://www.jianshu.com/p/84df2ca84ade
• iOS开发：调用系统自带相机以及获取相册照片的功能实现 - https://www.cnblogs.com/sundaysgarden/articles/9188975.html

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获取相册图片

1. 在 info.plist 中配置相册权限提示:

   Key    :  Privacy - Photo Library Usage Description    
   Value  :  $(PRODUCT_NAME) photo use

2. 实现 <UIKit/UIKit.h> 中 UIImagePickerControllerDelegate 代理接口

   // 当用户选取完成后调用；
   - (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info { ... }
   // 当用户取消选取时调用；
   - (void)imagePickerControllerDidCancel:(UIImagePickerController *)picker { ... }

3. 获取相册

   #import <Photos/Photos.h>
   
   // 检查相册是否可用
   +(BOOL)checkGallery{
       PHAuthorizationStatus authStatus = [PHPhotoLibrary authorizationStatus];
       if (authStatus == PHAuthorizationStatusRestricted || authStatus == PHAuthorizationStatusDenied) {
           return NO;
       }
       return YES;
   }
   
   // 获取相册
   -(void)getGallery:(CPicture*)data cb:(CodeMsgFn)cb {
       self.data = data;
       self.cb = cb;
       
       //本地相册不需要检查，因为UIImagePickerController会自动检查并提醒
       UIImagePickerController *picker = [[UIImagePickerController alloc] init];
       picker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
       picker.delegate = self;
       picker.allowsEditing = data.isEdit; // 设置选择后的图片可被编辑
       
       BOOL isOk = [PicHelper checkGallery]; // 先检查相机可用是否
       if (isOk == NO) {
           [self doCallback:ECodePermissionDenyError msg:@"--- no gallery permission"];
       } else {
           [Tool presentVC:picker]; // 打开相册
       }
   }

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相机拍照

1. 在 info.plist 中配置相机权限提示:

   Key    :  Privacy - Camera Usage Description   
   Value  :  $(PRODUCT_NAME) camera use

2. 实现 <UIKit/UIKit.h> 中 UIImagePickerControllerDelegate 代理接口 (和相册一样)

   // 当用户选取完成后调用；
   - (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info { ... }
   // 当用户取消选取时调用；
   - (void)imagePickerControllerDidCancel:(UIImagePickerController *)picker { ... }

3. 打开相机

   #import <AVFoundation/AVCaptureDevice.h>
   #import <AVFoundation/AVMediaFormat.h>
   
   // 检查相机是否可用
   +(BOOL)checkCamera{  // 如果用户点击 不允许, 则为 0
       NSString *mediaType = AVMediaTypeVideo;
       AVAuthorizationStatus authStatus = [AVCaptureDevice authorizationStatusForMediaType:mediaType];
       if(AVAuthorizationStatusRestricted == authStatus || AVAuthorizationStatusDenied == authStatus) {
           return NO;
       }
       return YES;
   }
   
   // 相机拍照
   -(void)takePicture:(CPicture*)data cb:(CodeMsgFn)cb {
       self.data = data;
       self.cb = cb;
       
       if ([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera]) {
           UIImagePickerController *picker = [[UIImagePickerController alloc] init];
           picker.sourceType = UIImagePickerControllerSourceTypeCamera;
           picker.delegate = self;
           picker.allowsEditing = data.isEdit; // 设置拍照后的图片可被编辑
           picker.sourceType = UIImagePickerControllerSourceTypeCamera;
           
           BOOL isOk = [PicHelper checkCamera]; // 先检查相机可用是否
           if (isOk == NO) {
               [self doCallback:ECodePermissionDenyError msg:@"--- no camera permission"];
           } else {
               [Tool presentVC:picker]; // 打开相机
           }
       } else {
           [self doCallback:ECodeUnknown msg:@"--- not isSourceTypeAvailable, you device may be iphonesimulator"];
       }
   }

4. 测试

   

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踩坑

调用拍照闪退

报错信息: he app's Info.plist must contain an NSCameraUsageDescription key with a string value explaining to the user how the app uses this data

就是需要在 info.plist 中配置相机提示.