用Swift从字符串中删除字符

All,

所有人,

I have a function :

我有一个函数:

 func IphoneName() -> String
    {
        let device = UIDevice.currentDevice().name
        return device
    }

Which returns the name of the iphone (simple). I need to remove the "'s Iphone" from the end. I have been reading about changing it to NSString and use ranges, but I am a bit lost!! Can you help ?

返回iphone的名称(简单)。我需要把“s Iphone”从末尾删除。我一直在阅读关于将它改为NSString并使用range的文章，但是我有点迷失了!你能帮助吗?

3 个解决方案

#1

What about this:

这个:

extension String {

    func removeCharsFromEnd(count:Int) -> String{
        let stringLength = countElements(self)

        let substringIndex = (stringLength < count) ? 0 : stringLength - count

        return self.substringToIndex(advance(self.startIndex, substringIndex))
    }

    func length() -> Int {
        return countElements(self)
    }
}

Test:

测试:

var deviceName:String = "Mike's Iphone"

let newName = deviceName.removeCharsFromEnd("'s Iphone".length()) // Mike

But if you want replace method use stringByReplacingOccurrencesOfString as @Kirsteins posted:

但是如果您想要替换方法，请使用stringByReplacingOccurrencesOfString作为@Kirsteins张贴的:

let newName2 = deviceName.stringByReplacingOccurrencesOfString(
     "'s Iphone", 
     withString: "", 
     options: .allZeros, // or just nil
     range: nil)

#2

You don't have to work with ranges in this case. You can use:

在这种情况下，你不必使用范围。您可以使用:

var device = UIDevice.currentDevice().name
device = device.stringByReplacingOccurrencesOfString("s Iphone", withString: "", options: .allZeros, range: nil)

#3

In Swift3:

在Swift3:

var device = UIDevice.currentDevice().name
device = device.replacingOccurrencesOfString("s Iphone", withString: "")

#1