xcode CGRect 到 UIImage
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时间：2020-09-14 22:02:58 来源:igfitidea点击:
CGRect to UIImage
提问by cyclingIsBetter
I have this code:
我有这个代码：
CGRect visibleRect;
visibleRect.origin = mainViewController.scrollView.contentOffset;
visibleRect.size = mainViewController.scrollView.bounds.size;
I want to store the content inside visibleRectin a UIImage. Is that possible?
我想将内容存储visibleRect在UIImage. 那可能吗？
采纳答案by MusiGenesis
This code may work:
此代码可能有效：
UIGraphicsBeginImageContext(visibleRect.size);
CGContextTranslateCTM(UIGraphicsGetCurrentContext(), visibleRect.origin.x,
visibleRect.origin.y);
[mainViewController.scrollView.layer
renderInContext:UIGraphicsGetCurrentContext()];
UIImage *viewImage = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
回答by Joseph Stein
You can't store a UIImage in the CGRect. You'd do something like the following
您不能在 CGRect 中存储 UIImage。你会做类似以下的事情
CGRect visibleRect;
visibleRect.origin = mainViewController.scrollView.contentOffset;
visibleRect.size = mainViewController.scrollView.bounds.size;
UIImageView* img = [[UIImageView alloc] init];
[img setFrame:visibleRect];
[img setImage:[UIImage imageNamed:@"Your-img"]];
[[self view] addSubview:img];
[img release];
