// 方法：設(shè)置頭像樣式
-(void)setHeadPortrait{

// self.liveHidImage.layer.masksToBounds=YES;

/**
 *  添加手勢：也就是當用戶點擊頭像了之后，對這個操作進行反應(yīng)
 */
//允許用戶交互
_liveHidImage.userInteractionEnabled = YES;

//初始化一個手勢
UITapGestureRecognizer *singleTap = [[UITapGestureRecognizer alloc]initWithTarget:self
                                                                           action:@selector(alterHeadPortrait:)];

//給imageView添加手勢
[_liveHidImage addGestureRecognizer:singleTap];

}

// 方法：alterHeadPortrait
-(void)alterHeadPortrait:(UITapGestureRecognizer )gesture{
/*
* 彈出提示框
*/
//初始化提示框
UIAlertController *alert = [UIAlertController alertControllerWithTitle:nil message:nil preferredStyle:UIAlertControllerStyleActionSheet];
//按鈕：從相冊選擇，類型：UIAlertActionStyleDefault
[alert addAction:[UIAlertAction actionWithTitle:@"從相冊選擇" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {
//初始化UIImagePickerController
UIImagePickerController *PickerImage = [[UIImagePickerController alloc]init];
//獲取方式1：通過相冊（呈現(xiàn)全部相冊），UIImagePickerControllerSourceTypePhotoLibrary
//獲取方式2，通過相機，UIImagePickerControllerSourceTypeCamera
//獲取方法3，通過相冊（呈現(xiàn)全部圖片），UIImagePickerControllerSourceTypeSavedPhotosAlbum
PickerImage.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
//允許編輯，即放大裁剪
PickerImage.allowsEditing = YES;
//自代理
PickerImage.delegate = self;
//頁面跳轉(zhuǎn)
[self presentViewController:PickerImage animated:YES completion:nil];

}]];
//按鈕：拍照，類型：UIAlertActionStyleDefault
[alert addAction:[UIAlertAction actionWithTitle:@"拍照" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action){
    /**
     其實和從相冊選擇一樣，只是獲取方式不同，前面是通過相冊，而現(xiàn)在，我們要通過相機的方式
     */
    UIImagePickerController *PickerImage = [[UIImagePickerController alloc]init];
    //獲取方式:通過相機
    PickerImage.sourceType = UIImagePickerControllerSourceTypeCamera;
    PickerImage.allowsEditing = YES;
    PickerImage.delegate = self;
    [self presentViewController:PickerImage animated:YES completion:nil];
}]];
//按鈕：取消，類型：UIAlertActionStyleCancel
[alert addAction:[UIAlertAction actionWithTitle:@"取消" style:UIAlertActionStyleCancel handler:nil]];
[self presentViewController:alert animated:YES completion:nil];

}

UIImagePickerControllerDelegate

//PickerImage完成后的代理方法

• (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary<NSString *,id> *)info{
  //定義一個newPhoto，用來存放我們選擇的圖片。
  UIImage *newPhoto = [info objectForKey:@"UIImagePickerControllerEditedImage"];
  _liveHidImage.image = newPhoto;
  [self dismissViewControllerAnimated:YES completion:nil];
  }