In the C language which，To convert type does not seem to how difficult，The learning Swift when there is confusion。
Which of them seem to remember spoken tutorial，But remember，This has found，On record：
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假定三个变量： var i:Int = 5 var f:Float = 3.3 var d:Double = 4.455 |
To convert to Double Int or Float ，It is as follows
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d = Double(i) f = Float(i) |
To convert Int，It is as follows：
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i = Int(d) i = Int(f) |
To convert to String，It is as follows：
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var string:String string = "\(i)" string = "\(d)" string = "\(f)" |
Int To String Switch, etc.，It is as follows
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var s:String = “2.555” var t:String = “3” //t可以直接使用 //t.toInt直接转换为Int型 //而s 用这个方法的话输出会是nil var s1 = s as NSString //有这一句之后，就可以用下方的方法转换为int、float、double s1.integerValue s1.doubleValue s1.floatValue |
There is an extension method can retain double digits，You want to keep the number of bits can be manipulated
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extension Double { func format(f:String) ->String { return NSString(format:"%\(f)f",self) } } |
d.format(“.2”)Two digits after the decimal point is reserved.，In this case the output will become "4.46"
Original article written by Gerber drop-off：R0uter's Blog » Swift Int Float Double String type convert
Reproduced Please keep the source and description link：https://www.logcg.com/archives/1014.html
