stringByReplacingOccurrencesOfString 删除整个字符串

Question

我正在尝试将字符串写入文本框，但如果第一个字符是 * 或字符串 == "" 我不想写入该字符串，但我想删除所有空格这样做

for command in InitialCommandsArr {
    let nulledCommand = command.stringByReplacingOccurrencesOfString(" ", withString: "")

    if nulledCommand != "" && 
       command.stringByReplacingOccurrencesOfString(" ", withString: "").characters.first != "*"
    {
        OutputCommand.text = "\(OutputCommand.text),{id:\"MinecartCommandBlock\",Command:\(command)}}"
    }
}

当我这样做时，虽然它用 "" 帮助替换了整个字符串？

Answer 1

刚试过这个：

    var labelText = "";
    let initialCommandsArr = ["foo","bar","*baz","   "]

    for command in initialCommandsArr {
        let nulledCommand = command.stringByReplacingOccurrencesOfString(" ", withString: "")
        if(nulledCommand.characters.count > 0 && nulledCommand.characters.first != "*"){

            labelText += ",{id:\"MinecartCommandBlock\",Command: \(command) }}"
        }
    }

    print(labelText)

打印出：

,{id:"MinecartCommandBlock",Command: foo }},{id:"MinecartCommandBlock",Command: bar }}

那就是你想要的？？

stringByReplacingOccurrencesOfString 删除整个字符串

stringByReplacingOccurrencesOfString removes whole string

nsstring

swift