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Swift 中出现这个问题：从第二个参数起，自动加上lable
func sayHello(name:String? ,greeting:String)->String
{
let result = greeting + "," + (name ?? "Guest") + "!"
return result
}
var nickname:String?
nickname = "yc"
//“Goodmorning前面应该增加greeting：”
print( sayHello("yc","Goodmoring") )
［Swift中错误］missing argument label 'greeting:' in call
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原文地址：http://www.cnblogs.com/superorangecc/p/5193929.html
