Question

@IBAction func logEmButn(sender: AnyObject) {
    let clonCountrLableItem = clonCountLable.text!
    let baclCounterLableItem = baclCountLable.text!
    let ironCountLableItem = ironCountLable.text!
    let gymCountLableItem = gymCountLable.text!
    let asp2CountLableItem = asp2CountLable.text!
    let fiveHtpLableItem = fiveHtpLable.text!


    let selectedLables = [clonCountLable, baclCountLable, ironCountLable, gymCountLable, asp2CountLable, fiveHtpLable]

    for selectedLable in selectedLables {
        if selectedLable != "0 s" {

            println("You took \(selectedLable[selectedLable.startIndex])")

今天早些时候在一个类似的＆＃34;项目，现在它给出了错误

＆＃39; NSObject的＆＃39;没有名为＆＃39; startIndex＆＃39;
的成员

所以，我试过了：

println("You took \(selectedLable[selectedLable.description]) \(keyOfselectedLables)")

给出了类似的错误，但以......命名＆＃39;下标＆＃39;

结尾

也尝试过：

            let lable = "rick"
            for index in indices(lable) {
                print("\(lable[index])")

            }

在运行时给出错误：无法转换类型＆＃39; UILable＆＃39; （0x199943e30）到＆＃39; NSString＆＃39; （0x198fb2768）。

Answer 1

参见下面的代码，selectedLables是UILabel的数组

let selectedLables = [clonCountLable, baclCountLable, ironCountLable, gymCountLable, asp2CountLable, fiveHtpLable]

但是在if语句中，您将类型为UILabel的selectedLable与字符串常量等同。

for selectedLable in selectedLables {
    if selectedLable != "0 s"

由于selectedLable不是字符串类型，因此它没有startIndex属性或索引。

所以我认为数组应该是

let selectedLables = [baclCounterLableItem, ironCountLableItem, gymCountLableItem, asp2CountLableItem, fiveHtpLableItem]

Answer 2

Nitheesh George钉了它。（我在这里看到的最后一个答案。）很抱歉，如果我搞砸了这里的流程，那就完全没了。

NSObject没有名为startIndex的成员

2 个答案: