Swift教程之typealias取代OC的typedef

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標籤:swift   typedef   string   oc   

//MARK:-------swift中的typedef--------------//使用 關鍵字定義類型別名,類似typedeftypealias NSInteger = Intvar value : NSInteger = 45value = 12print(value);//MARK:-------String--------------let label = "The width is "let width = 94var widthLabel = label + String(width)  //Swift不支援隱式類型轉換,需要顯式類型轉換widthLabel += "!"print(widthLabel)//Swift使用\(item)的形式進行字串格式化let apples = 3let oranges = 5let appleSummary = "I have \(apples) apples."let fruitSummary = "I have \(apples + oranges) pieces of fruit."

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Swift教程之typealias取代OC的typedef

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