将字符串转换（浮点值）在斯威夫特

Question

诠释你好，我有串“（与float值）”

let floatstring : String = "23.24" 
print(floatstring) 

我想浮动String转换为Int。 谢谢！

Answer 1

选项1

let intNum = Int(Float(floatstring)!) 

选项2

if floatstring.rangeOfString(".") != nil { 
    let i = Int(floatstring.componentsSeparatedByString(".").first!) 
    print(i) 
} 

Answer 2

它应该是这样的：

http://swiftlang.ng.bluemix.net/#/repl/57bd6566b36620d114f80313

let floatstring : String = "23.24" 
print(Int(Float(floatstring)!)) 

Answer 3

您可以将字符串强制转换为浮点型然后转换为Int型。

if let floatValue = Float(floatString) { 
    if let intValue = Int(floatValue) { 
     print(intValue) //that is your Int 
    } 
} 

如果它不打印任何东西，那么字符串不是'floatString'。 顺便说一句，你可以通过结合这些问题的答案简单地找到答案。

Stackoverflow: String to Int

Stackoverflow: Casting Float to Int

Answer 4

尝试这个

let floatValue = "23.24".floatValue // first convert string to float 
let intValue:Int? = Int(floatValue) // then convert float to int 
print(intValue!) 

Answer 5

1.对于雨燕2.0

let intValue=int(float(floatString)) 

2.对于旧版本的雨燕

let floatValue = (floatString.text as NSString).floatValue 
let intValue:Int? = Int(floatValue) 

3.对于目标-C

floatValue = [floatString floatValue]; 
int intValue:Int = (int) floatValue;