CGRect

最新推荐文章于 2018-06-05 12:05:10 发布

weixin_34321753

最新推荐文章于 2018-06-05 12:05:10 发布

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原文链接：http://www.cnblogs.com/puppyb2m/p/4574022.html

本文介绍了如何使用CGRectInset函数来创建比现有矩形更大或更小的新矩形，并通过具体的Swift代码示例展示了如何实现这一点。对于需要精确控制视图尺寸的应用场景尤其有用。

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// 1 CGRectInset

If you need to create a rectangle that is either larger or smaller than an existing rectangle, centered on the same point, try CGRectInset:

CGRect rect5 = CGRectMake(100, 100, 100, 100);
// Use positive values for a smaller rectangle
CGRect rect6 = CGRectInset(rect, 25, 25);
 
NSLog(@"%rect5: %@", NSStringFromCGRect(rect5));
NSLog(@"%rect6: %@", NSStringFromCGRect(rect6));
 
...
 
CGRect rect7 = CGRectMake(100, 100, 100, 100);
// Use negative values for a larger rectangle
CGRect rect8 = CGRectInset(rect, -25, -25);
 
NSLog(@"rect7: %@", NSStringFromCGRect(rect7));
NSLog(@"rect8: %@", NSStringFromCGRect(rect8));

转载于:https://www.cnblogs.com/puppyb2m/p/4574022.html