我正在尝试在导航项中添加自定义lefBarButton 但它什么也没显示 我尝试了这些答案
https://stackoverflow.com/questions/48564480/custom-leftbarbuttonitem-not-showed-in-ios-11
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我的视图控制器的搜索类型为show。
这是我的代码
let leftButton = UIButton(type: .roundedRect)
leftButton.addTarget(self, action: #selector(backClick), for: .touchUpInside)
leftButton.setTitle("", for: .normal)
leftButton.tintColor = UIColor.red
leftButton.imageView?.image = UIImage(named: "back-icon")
leftButton.frame = CGRect(x: 0, y: 0, width: 22, height: 15)
self.navigationItem.leftBarButtonItem = UIBarButtonItem.init(customView: leftButton)
我花了几个小时来修复它。 没有人有任何想法。
答案 0 :(得分:2)
问题出在这一行。
leftButton.imageView?.image = UIImage(named: "back-icon")
imageView是只读属性。
如果要设置图像,则应这样设置。
leftButton.setImage(UIImage("back-icon"), for: .normal) // Make sure your image is actually named "back-icon"