CGRect

// 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:

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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));

posted on 2015-06-13 20:05  puppyb2m  阅读(121)  评论(0)  编辑  收藏  举报

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