ios如何捕获屏幕的特定部分 [英] ios how to capture a particular portion of screen

问题描述

我想拍摄iPhone屏幕的特定部分。我使用 UIGraphicsBeginImageContextWithOptions ，但无法用此捕获部分屏幕。
请帮助我。

I want to capture a particular portion of iPhone screen. I used UIGraphicsBeginImageContextWithOptions, but couldn't capture a portion of screen with this. Please help me.

推荐答案

您可以使用 UIGraphicsGetImageFromCurrentContext 。从内存中写下面的代码，因此可能出错。请自行更正。

You can take screen shot using UIGraphicsGetImageFromCurrentContext. Wrote below code from memory, so errors possible. Please correct it yourself.

- (UIImage*)captureView:(UIView *)yourView {
    CGRect rect = [[UIScreen mainScreen] bounds];
    UIGraphicsBeginImageContext(rect.size);
    CGContextRef context = UIGraphicsGetCurrentContext();
    [yourView.layer renderInContext:context];
    UIImage *image = UIGraphicsGetImageFromCurrentImageContext();
    UIGraphicsEndImageContext();
    return image;
}

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