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func test(name:String){} |
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func test(name:String) -> Bool{ return true} |
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func test(name:String) -> (Int,Bool){ var position = 1 var visible = false return (position,visible)} |
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func test(numbers:Int...) -> Int{ var count:Int = 0 for number in numbers{ count += number } return count} |
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var age = 22//无法编译func add(age:Int) { age +=1}//可以编译func add(var age:Int) { age +=1} |
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var age = 22func add(inout age:int){ age += 1}changeAge(&age)println(age) //23 |
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func additive(a:Int, b:Int) -> Int{ return a + b}//函数类型的参数func printAdditiveResult(addFun: (Int, Int) -> Int, a:Int, b:Int){ println("Result:\(addFun(a,b))")}printAdditiveResult(additive, a: 5 ,b: 7) |
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//定义个自增函数func increase(input:Int) -> Int{ return input + 1}//定义个自减函数func reduce(input:Int) -> Int{ return input - 1}//定义一个返回函数类型的函数func chooseFunction(backwards:Bool) -> (Int) -> Int{ return backwards ? reduce : increase}//测试let aFun = chooseFunction(3>2)println(aFun(3)) //2 |
原文：http://www.cnblogs.com/Free-Thinker/p/4838090.html