iOS开发 手机选取相册 相机照片 做头像 封面

// 方法：设置头像样式
-(void)setHeadPortrait{

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

/**
 *  添加手势：也就是当用户点击头像了之后，对这个操作进行反应
 */
//允许用户交互
_liveHidImage.userInteractionEnabled = YES;

//初始化一个手势
UITapGestureRecognizer *singleTap = [[UITapGestureRecognizer alloc]initWithTarget:self
                                                                           action:@selector(alterHeadPortrait:)];

//给imageView添加手势
[_liveHidImage addGestureRecognizer:singleTap];

}

// 方法：alterHeadPortrait
-(void)alterHeadPortrait:(UITapGestureRecognizer )gesture{
/*
* 弹出提示框
*/
//初始化提示框
UIAlertController *alert = [UIAlertController alertControllerWithTitle:nil message:nil preferredStyle:UIAlertControllerStyleActionSheet];
//按钮：从相册选择，类型：UIAlertActionStyleDefault
[alert addAction:[UIAlertAction actionWithTitle:@"从相册选择" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {
//初始化UIImagePickerController
UIImagePickerController *PickerImage = [[UIImagePickerController alloc]init];
//获取方式1：通过相册（呈现全部相册），UIImagePickerControllerSourceTypePhotoLibrary
//获取方式2，通过相机，UIImagePickerControllerSourceTypeCamera
//获取方法3，通过相册（呈现全部图片），UIImagePickerControllerSourceTypeSavedPhotosAlbum
PickerImage.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
//允许编辑，即放大裁剪
PickerImage.allowsEditing = YES;
//自代理
PickerImage.delegate = self;
//页面跳转
[self presentViewController:PickerImage animated:YES completion:nil];

}]];
//按钮：拍照，类型：UIAlertActionStyleDefault
[alert addAction:[UIAlertAction actionWithTitle:@"拍照" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action){
    /**
     其实和从相册选择一样，只是获取方式不同，前面是通过相册，而现在，我们要通过相机的方式
     */
    UIImagePickerController *PickerImage = [[UIImagePickerController alloc]init];
    //获取方式:通过相机
    PickerImage.sourceType = UIImagePickerControllerSourceTypeCamera;
    PickerImage.allowsEditing = YES;
    PickerImage.delegate = self;
    [self presentViewController:PickerImage animated:YES completion:nil];
}]];
//按钮：取消，类型：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{
  //定义一个newPhoto，用来存放我们选择的图片。
  UIImage *newPhoto = [info objectForKey:@"UIImagePickerControllerEditedImage"];
  _liveHidImage.image = newPhoto;
  [self dismissViewControllerAnimated:YES completion:nil];
  }