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NSLog(@"%@",NSStringFromCGRect(switch.frame));
或者
CFShow(NSStringFromCGRect(switch.frame));
NSLog的格式如下所示:
NSStringFromCGPoint NSStringFromCGAffineTransform NSStringFromUIEdgeInsets
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原文地址:http://www.cnblogs.com/KiVen2015/p/5568529.html