个人中心
gpt4 book ai didi

ios - 打开相机时截取屏幕截图 -iOS

转载 作者：塔克拉玛干 更新时间：2023-11-02 08:20:41 24 4
gpt4 key购买 nike

<分区>

我正在开发一个 AR 应用程序，我在我的项目中使用了苹果的 AVCam 示例代码。我正在尝试使用我在此处找到的以下方法截取屏幕截图，但它们对我不起作用。有什么建议么？谢谢。

    - (UIImage *) screenshot {
        UIWindow *window = [UIApplication sharedApplication].keyWindow;

        if ([[UIScreen mainScreen] respondsToSelector:@selector(scale)])
            UIGraphicsBeginImageContextWithOptions(window.bounds.size, NO, [UIScreen mainScreen].scale);
        else
            UIGraphicsBeginImageContext(window.bounds.size);
        [self.view.layer renderInContext:UIGraphicsGetCurrentContext()];
        UIImage *image = UIGraphicsGetImageFromCurrentImageContext();
        UIGraphicsEndImageContext();
        NSData * data = UIImageJPEGRepresentation(image, 1.0);

        return [UIImage imageWithData:data];
    }

    - (UI

Image*)screenshot2
{
    // On iOS prior to 4, fall back to use UIGraphicsBeginImageContext
    CGSize imageSize = [[UIScreen mainScreen] bounds].size;
    if (NULL != UIGraphicsBeginImageContextWithOptions)
        UIGraphicsBeginImageContextWithOptions(imageSize, NO, 0);
    else
        UIGraphicsBeginImageContext(imageSize);

    CGContextRef context = UIGraphicsGetCurrentContext();

    // Iterate over every window from back to front
    for (UIWindow *window in [[UIApplication sharedApplication] windows])
    {
        if (![window respondsToSelector:@selector(screen)] || [window screen] == [UIScreen mainScreen])
        {
            // -renderInContext: renders in the coordinate space of the layer,
            // so we must first apply the layer's geometry to the graphics context
            CGContextSaveGState(context);
            // Center the context around the window's anchor point
            CGContextTranslateCTM(context, [window center].x, [window center].y);
            // Apply the window's transform about the anchor point
            CGContextConcatCTM(context, [window transform]);
            // Offset by the portion of the bounds left of and above the anchor point
            CGContextTranslateCTM(context,
                                  -[window bounds].size.width * [[window layer] anchorPoint].x,
                                  -[window bounds].size.height * [[window layer] anchorPoint].y);

            // Render the layer hierarchy to the current context
            [[window layer] renderInContext:context];

            // Restore the context
            CGContextRestoreGState(context);
        }
    }

    // Retrieve the screenshot image
    UIImage *image = UIGraphicsGetImageFromCurrentImageContext();

    UIGraphicsEndImageContext();

    return image;
}

24 4 0
文章推荐： iphone - (iPhone) 来自 iPod 的实时 FFT
文章推荐： java - SLF4J:避免完全限定的类名
文章推荐： java - 如何执行随机算法
文章推荐： java - 在 KeyStore.load() 中使用日语密码会导致 java.io.IOException : Keystore was tampered with, 或密码不正确
塔克拉玛干
个人简介

我是一名优秀的程序员,十分优秀！

滴滴打车优惠券免费领取
滴滴打车优惠券
Copyright 2021 - 2024 cfsdn All Rights Reserved 蜀ICP备2022000587号
广告合作:1813099741@qq.com 6ren.com