Xcode中的链接器错误？ [英] Linker error in Xcode?

问题描述

当我尝试在模拟器上运行我的应用程序时，我遇到了一个奇怪的错误。该错误在以下代码/文件中。 （我不确定它叫什么）：

 架构i386的未定义符号：
_main，引用自：
隐式条目/主要可执行文件的启动
 ld：未找到体系结构的符号i386 
 clang：错误：链接器命令失败，退出代码1 （使用-v查看调用）
  

上面的错误有两部分以红色突出显示; _ main，引用自：和链接器命令失败，退出代码1（使用-v查看调用）。

我以前从未遇到过此错误。因此，我无法解决它。这是我的代码，以防万一有必要：

  class ViewController：UIViewController {
 
 override func viewDidLoad （）{
 super.viewDidLoad（）
 
} 
 
覆盖func didReceiveMemoryWarning（）{
 super.didReceiveMemoryWarning（）
 
} 
 
 @IBOutlet weak var strWordValue：UILabel！ 
 @IBOutlet weak var strInputField：UITextField！ 
 
 
 func textFieldShouldReturn（textField：UITextField） - > Bool {
 textField.resignFirstResponder（）
 
 let word = textField.text 
 let score = scoreForWord（word）
 
 return true 
 } 
 
 var TextField：UITextField！ 
 
 private let alphabet = [a，b，c，d，e，f，g，h，i j，k，l，m，n，o，p，q，r，s，t，u ，w，x，y，z] 
 
 func valueOfLetter（letter：Character） - > int 
 {
 let letterString = String（letter）.uppercaseString 
 let index = find（alphabet，letterString）
 
 return index！= nil？指数！ + 1：0 
} 
 
 func scoreForWord（word：String） - > Int 
 {
 let characters = Array（word）
 return characters.reduce（0）{sum，sum in sum + self.valueOfLetter（letter）} 
 
 
} 
 
 func textField（textField：UITextField，shouldChangeCharactersInRange range：NSRange，replacementString string：String） - > Bool 
 {
让currentWord = textField.text为NSString 
 let newWord = currentWord.stringByReplacingCharactersInRange（range，withString：string）
 
 let score = scoreForWord（newWord） 
 
返回true 
} 
} 
  

请包括对这个错误的意义的解释。

解决方案

几个月前我已经发生了这个错误消息。您的库不支持模拟器。你需要运行在实际的设备上而不是模拟器。

I am getting a weird error when I attempt to run my app on the simulator. The error is within the following code/file. (I am unsure of what it is called):

Undefined symbols for architecture i386:
"_main", referenced from:
implicit entry/start for main executable
ld: symbol(s) not found for architecture i386
clang: error: linker command failed with exit code 1 (use -v to see invocation)   

There are two parts of the error above that are highlighted in red; "_main", referenced from: and linker command failed with exit code 1 (use -v to see invocation).

I have never encountered this error before. Therefore, I am unable to fix it. Here is my code in case it is necessary:

class ViewController: UIViewController {

override func viewDidLoad() {
    super.viewDidLoad()

}

override func didReceiveMemoryWarning() {
    super.didReceiveMemoryWarning()

}

@IBOutlet weak var strWordValue: UILabel!
@IBOutlet weak var strInputField: UITextField!


func textFieldShouldReturn(textField: UITextField) -> Bool{
    textField.resignFirstResponder()

    let word = textField.text
    let score = scoreForWord(word)

    return true
}

var TextField: UITextField!

        private let alphabet = ["a", "b", "c", "d", "e", "f", "g", "h", "i", "j", "k", "l", "m", "n", "o", "p", "q", "r", "s", "t", "u", "v", "w", "x", "y", "z"]

func valueOfLetter(letter: Character) -> Int
{
let letterString = String(letter).uppercaseString
let index = find(alphabet, letterString)

return index != nil ? index! + 1 : 0
}

func scoreForWord(word: String) -> Int
{
    let characters = Array(word)
    return characters.reduce(0) { sum, letter in sum + self.valueOfLetter(letter) }


}

  func textField(textField: UITextField, shouldChangeCharactersInRange range: NSRange, replacementString string: String) -> Bool
  {
let currentWord = textField.text as NSString
let newWord = currentWord.stringByReplacingCharactersInRange(range, withString: string)

let score = scoreForWord(newWord)

return true
}
}

Please include an explanation of what this error(s) mean.

解决方案

This error message already happen to me a few of months ago. Your library not supported for simulator. You need to run on actual device instead of simulator.

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