iphone - 为 UIImageView 截屏

Question

我想截取我 View 中特定部分的屏幕截图(具体来说是 ImageView )，是否有机会....

Answer 1

看来您需要执行 renderInContext。

// Size of the result rendered image
CGSize targetImageSize = CGSizeMake(100, 100);
// Check for retina image rendering option
if (NULL != UIGraphicsBeginImageContextWithOptions) UIGraphicsBeginImageContextWithOptions(targetImageSize, NO, 0);
else UIGraphicsBeginImageContext(targetImageSize);

CGContextRef context = UIGraphicsGetCurrentContext();
// The view to be rendered
[[yourImageView layer] renderInContext:context];
// Get the rendered image
UIImage *original_image = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();