UIImagePickerController的使用

UIImagePickerController的使用

第一步:设置info,开启权限

@interface ViewController ()

@property (weak, nonatomic) IBOutlet UIImageView *imageView;

@end

@implementation ViewController

- (void)viewDidLoad { 

   [super viewDidLoad];    

}

- (void)touchesBegan:(NSSet*)touches withEvent:(UIEvent *)event{    

//1.创建相册选取器  

  UIImagePickerController *picker = [[UIImagePickerController alloc] init];  

  //2.设置代理  UIImagePickerController有两个协议：UINavigationControllerDelegate  UIImagePickerControllerDelegate    (注意:实现完代理方法一定要释放picker)

picker.delegate = self;   

 //3.设置来源    (注意:相机属性一定要用真机,模拟器不支持)

/**    UIImagePickerControllerSourceTypePhotoLibrary,相册  (手机相簿)    UIImagePickerControllerSourceTypeCamera,相机（模拟器不支持）    UIImagePickerControllerSourceTypeSavedPhotosAlbum，相册（手机照片）    */    picker.sourceType = UIImagePickerControllerSourceTypeSavedPhotosAlbum;   

 //4.允许编辑   

 picker.allowsEditing = YES; 

   //5.弹出相册选取器  

  [self presentViewController:picker animated:YES completion:nil];

}

#pragma mark -UIImagePickerControllerDelegate/**完成选取的两个方法为递进关系 *///2.完成选取  该方法与下面方法1唯一的区别就是将编辑之后的图片image作为参数暴露在外部,而方法二则需要从字典中获取图片

- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingImage:(UIImage *)image editingInfo:(nullable NSDictionary*)editingInfo{

    [picker dismissViewControllerAnimated:YES completion:nil];    NSLog(@"%@",editingInfo);    NSLog(@"%@",image);}

//1.完成选取- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary*)info{

[picker dismissViewControllerAnimated:YES completion:nil];

//    info中包括选取的照⽚片,视频的主要信息

//    NSString *const UIImagePickerControllerMediaType; 选取的类型 public.image public.movie

//    NSString *const UIImagePickerControllerOriginalImage; 修改前 的UIImage object.

//    NSString *const UIImagePickerControllerEditedImage; 修改后 的UIImage object.

//    NSString *const UIImagePickerControllerCropRect; 原始图 ⽚片的尺⼨寸NSValue object containing a CGRect data type

//    NSString *const UIImagePickerControllerMediaURL; 视频在⽂文件系统中 的 NSURL地址

//    保存视 频主要时通过获取其NSURL 然后转换成NSData

UIImage *image = info[UIImagePickerControllerEditedImage];

self.imageView.image = image;

NSLog(@"%@",info);

}

//取消选取

- (void)imagePickerControllerDidCancel:(UIImagePickerController *)picker{

[picker dismissViewControllerAnimated:YES completion:nil];

}

@end

GitHub 链接地: https://github.com/KeithBigBather666/UIImagePickerController-.git