iOS实现截屏并保存到相册

最新推荐文章于 2022-04-15 12:54:17 发布

joneOS

最新推荐文章于 2022-04-15 12:54:17 发布

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分类专栏： iOS 文章标签： ios截屏图片保存相册

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本文介绍了在iOS中实现屏幕截图的方法，包括获取UIView的截图并将其转换为UIImage，以及如何将UIImage保存到设备的相册中。文中提供了具体的代码实现。

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写入相册需要导入的头文件：

#import <AssetsLibrary/AssetsLibrary.h>

...

1. iOS7之后的截屏方法，返回view

UIView *view = [self.view snapshotViewAfterScreenUpdates:YES];

[self.view addSubview:view];

2. 返回UIImage的截屏方法

/**
* 截屏
*
* @param view 需要截屏的视图
*
* @return 截屏后的图片
*/
- (UIImage *)captureImageInView:(UIView *)view
{
    UIGraphicsBeginImageContextWithOptions(view.bounds.size, YES, 0);
    [view.layer renderInContext:UIGraphicsGetCurrentContext()];
    UIImage *viewImage = UIGraphicsGetImageFromCurrentImageContext();
    UIGraphicsEndImageContext();
    CGImageRef imageRef = viewImage.CGImage;
    CGRect rect = view.bounds; // 在view上的截图的区域
    CGImageRef imageRefRect =CGImageCreateWithImageInRect(imageRef, rect);
    UIImage *sendImage = [[UIImage alloc] initWithCGImage:imageRefRect];
    NSData *imageViewData = UIImagePNGRepresentation(sendImage);

    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
    NSString *documentsDirectory = [paths objectAtIndex:0];
    NSString *savedImagePath = [documentsDirectory stringByAppendingPathComponent:@"result.png"];
    NSLog(@"%@", savedImagePath);
    [imageViewData writeToFile:savedImagePath atomically:YES];
    CGImageRelease(imageRefRect);

    return viewImage;

}

3. 写入相册

// 写入相册
- (void)saveToLibratyWithImage:(UIImage *)image
{
    ALAssetsLibrary *library = [[ALAssetsLibrary alloc] init];
    [library writeImageToSavedPhotosAlbum:[image CGImage]
                              orientation:(ALAssetOrientation)[image imageOrientation]
                          completionBlock:^(NSURL *assetURL, NSError *error){

}];

}

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