Objective - C UIActionSheet 图片相关 将选中图片放在指定位置并适应大小,长按保存

// 在viewController上签订协议

<UIActionSheetDelegate,UIImagePickerControllerDelegate,UINavigationControllerDelegate>

// 定义指定图片所在视图属性

@property(nonatomic,retain)UIImageView *imageView;

// 弹出框设置

     UIActionSheet *sheet = [[UIActionSheetalloc] initWithTitle:@"图片"delegate:selfcancelButtonTitle:@"2"destructiveButtonTitle:@"从相册选取"otherButtonTitles:@"4",nil];

    // 显示

    [sheet showInView:self.view];

// 设置指定视图

    self.imageView = [[UIImageViewalloc] initWithFrame:CGRectMake(100,100, 200, 200)];

    self.imageView.backgroundColor = [UIColoryellowColor];

    [self.viewaddSubview:self.imageView];

// 打开用户交互

    self.imageView.userInteractionEnabled =YES;

    

    // 设置长按手势

    UILongPressGestureRecognizer *longpress = [[UILongPressGestureRecognizeralloc] initWithTarget:selfaction:@selector(longpressAction:)];

    [self.imageViewaddGestureRecognizer:longpress];

// 长按方法实现

- (void)longpressAction:(UILongPressGestureRecognizer *)press{

    // 把图片保存到本地相册

    // 后面三个参数主要是作为保存之后的信息回调,把保存的结果返回

    UIImageWriteToSavedPhotosAlbum(self.imageView.image,nil, nil, nil);

    

}

// 提示框点击方法

- (void)actionSheet:(UIActionSheet *)actionSheet clickedButtonAtIndex:(NSInteger)buttonIndex{

    // 点击方法

    NSLog(@"%ld",buttonIndex);

    UIImagePickerController *picker = [[UIImagePickerControlleralloc] init];

    // 设置代理人

    picker.delegate = self;

    // 允许编辑

    picker.allowsEditing = YES;

    

    // 模态进行跳转

    [selfpresentViewController:picker animated:YEScompletion:^{

        

    }];

}

// imagePickerController:相册拾取器,UIImagePickerController 这个类可以为大家提供照相的功能,以及图片,视频浏览的功能

- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary<NSString *,id> *)info{

    //

    [picker dismissViewControllerAnimated:YEScompletion:^{

        

    }];

    

    NSLog(@"%@",info);

    // 从字典里提取info里的图片内容

    UIImage *image = [infoobjectForKey:UIImagePickerControllerOriginalImage];

    self.imageView.image = image;

    

}