访问系统相册或调用摄像头

今天药忘吃喽~ 2022-08-09 18:49 257阅读 0赞

头文件：\#import <MobileCoreServices/MobileCoreServices.h>

协议：<UINavigationControllerDelegate, UIImagePickerControllerDelegate>

// 调用系统相册获取图片

\- (IBAction)getImageFromAlbum:(id)sender \{  
    // 判断系统相册是否可用（比如用户不允许应用访问他的相册，就不可用）  
    if (\[UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypePhotoLibrary\]) \{  
        \[self loadImagePickerControllerWithSourceType:UIImagePickerControllerSourceTypePhotoLibrary\];  
    \} else  \{  
        NSLog(@"无法调用系统相册");  
    \}  
\}  
// 拍照  
\- (IBAction)takePhoto:(id)sender \{  
    if (\[UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera\]) \{  
        \[self loadImagePickerControllerWithSourceType:UIImagePickerControllerSourceTypeCamera\];  
    \} else \{  
        NSLog(@"无法调用相机功能");  
    \}

\}  
\- (void)loadImagePickerControllerWithSourceType:(UIImagePickerControllerSourceType)type \{  
    UIImagePickerController \*controller = \[\[UIImagePickerController alloc\] init\];  
    controller.sourceType = type;  
    controller.delegate = self; // <UINavigationControllerDelegate, UIImagePickerControllerDelegate>  
    controller.allowsEditing = YES;  
    \[self presentViewController:controller animated:YES completion:nil\];  
\}

\#pragma mark - <UIImagePickerControllerDelegate>  
// 选完图片时回调  
/\*\*  
\- (void)imagePickerController:(UIImagePickerController \*)picker didFinishPickingImage:(UIImage \*)image editingInfo:(NSDictionary \*)editingInfo \{\}  
 \*/  
  
// 选完媒体资源【（图片）（小视频）】时回调  
\- (void)imagePickerController:(UIImagePickerController \*)picker didFinishPickingMediaWithInfo:(NSDictionary \*)info \{  
    // 判断选中的资源的类型  
    NSString \*mediaType = \[info objectForKey:UIImagePickerControllerMediaType\];  
      
    // kUTTypeImage 系统预置的图片资源类型  
    if (\[mediaType isEqualToString:(NSString \*)kUTTypeImage\]) \{  
        UIImage \*image = \[info objectForKey:UIImagePickerControllerEditedImage\];  
        // self.view.backgroundColor = \[UIColor colorWithPatternImage:image\];  
          
        // 将原图压缩成50\*50的尺寸  
        UIImage \*smallImage = \[\[ImageTool shareTool\] resizeImageToSize:CGSizeMake(300,300) sizeOfImage:image\];  
        self.view.backgroundColor = \[UIColor colorWithPatternImage:smallImage\];  
    \}  
      
    \[picker dismissViewControllerAnimated:YES completion:nil\];  
\}  
  
// 取消【点击cancel的时候触发】  
\- (void)imagePickerControllerDidCancel:(UIImagePickerController \*)picker \{  
    \[picker dismissViewControllerAnimated:YES completion:nil\];  
\}