在变量上获取布尔类型错误

Question

我正在尝试创建一个字符串变量 if 语句，但我得到 '()' is not convertible to 'BooleanType' 这是代码

import UIKit

class ViewController: UIViewController {

    @IBOutlet weak var button: UIBarButtonItem!
    @IBOutlet weak var textView: UITextField!
    var git =  StringLiteralType()
    var num = Int()
    func go() {
        if git = "4" {
          button.enabled = true
        }
    }
    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view, typically from a nib.
        git = self.textView.text!
        button.enabled = false

    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }

}

Answer 1

混淆赋值运算符=与等于运算符==.

您需要等于运算符

if git == "4"

在变量上获取布尔类型错误

Getting boolean type errors on variables

optional

swift