ios截屏并保存到相册

CALayer 截图 相册： ios

- (IBAction)btnClick:(UIButton *)sender {
    UIGraphicsBeginImageContextWithOptions(self.view.frame.size, NO, 0);
    CGContextRef ctx = UIGraphicsGetCurrentContext();
    // 将要保存的view绘制到上下文中
    [self.view.layer renderInContext:ctx];
    UIImage *img = UIGraphicsGetImageFromCurrentImageContext();
    UIGraphicsEndImageContext();
    // 将图片保存到相册
    UIImageWriteToSavedPhotosAlbum(img, self, @selector(image:didFinishSavingWithError:contextInfo:), nil);
}
// 图片保存到相册掉用，固定写法
- (void)image:(UIImage *)image didFinishSavingWithError:(NSError *)error contextInfo:(void *)contextInfo{
    if (error) {
        NSLog(@"保存失败");
    }else{
        NSLog(@"保存成功");
    }
}