06 2016 档案

摘要:let singleTap = UITapGestureRecognizer(target: self, action: #selector(DemoController7.stopWattingCircle)) singleTap.numberOfTapsRequired = 1 singleTa 阅读全文
posted @ 2016-06-07 08:56 ExpressFF 阅读(2183) 评论(0) 推荐(0)
摘要:1.解包包装类型,只需要尾部加! 2.初始化赋值必须保证变量是包装类型 var str : String? = nil 阅读全文
posted @ 2016-06-01 18:56 ExpressFF 阅读(221) 评论(0) 推荐(0)

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