如何调用本地相册、相机

 

1、判断系统是否支持相机

[UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera]

2、创建相册视图控制器对象

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

3、设置sourceType（资源类型）

imagePickerController.sourceType = UIImagePickerControllerSourceTypeCamera;//相机

imagePickerController.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;//图片库

imagePickerController.sourceType = UIImagePickerControllerSourceTypeSavedPhotosAlbum;//保存的图片

4、设置弹出动画（可选）

imagePickerController.modalTransitionStyle = UIModalTransitionStyleCoverVertical;

5、设置是否允许编辑图片

imagePickerController.allowsEditing = YES;

6、设置代理(UIImagePickerControllerDelegate)

imagePickerController.delegate = self;

7、实现代理方法：获取图片

- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info

{

     [picker dismissViewControllerAnimated:YES completion:nil];

    //获取图片

     UIImage *image = [info objectForKey:UIImagePickerControllerOriginalImage];

}

//取消点击

- (void)imagePickerControllerDidCancel:(UIImagePickerController *)picker

{

    [self dismissViewControllerAnimated:YES completion:^{}];

}

8、保存图片到相册

UIImageWriteToSavedPhotosAlbum(image, self, @selector(image:didFinishSavingWithError:contextInfo:), nil);//image：要保存的图片UImage对象，

- (void) image: (UIImage *) image

didFinishSavingWithError: (NSError *) error

   contextInfo: (void *) contextInfo{

//如果error==NULL，则表示图片保存成功

}

 

具体代码：

- (void)viewDidLoad {
    [super viewDidLoad];
    UIButton *btn = [UIButton buttonWithType:UIButtonTypeCustom];
    btn.frame = CGRectMake(10, 50, 80, 80);
    btn.backgroundColor = [UIColor redColor];

    [btn addTarget:self action:@selector(showpicker) forControlEvents:UIControlEventTouchUpInside];

    [self.view addSubview:btn]；   

}
-(void)showpicker{
    UIImagePickerController *imagepicker = [[UIImagePickerController alloc]init];
    imagepicker.sourceType = 2;//设置类型（0代表调用相册，1 代表弹出相机）
    imagepicker.allowsEditing = YES;//是否允许编辑，默认no，设置为yes时，点击图片会进入编辑界面（裁剪）
   

    imagepicker.delegate = self;//设置代理

    [self presentViewController:imagepicker animated:YES completion:nil];//弹出相册／相机
}
//选择图片后调用的代理方法
-(void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary<NSString *,id> *)info{
    NSLog(@"%@",info);
    UIImage *image = info[@"UIImagePickerControllerEditedImage"];//获取图片
    UIImageView *imageview = [[UIImageView alloc]initWithImage:image];
    imageview.frame = CGRectMake(40, 150, 100, 100);

    [self.view addSubview:imageview]; 

    [self dismissViewControllerAnimated:YES completion:nil];//消失imagepicker

}