UIFont is not convertible 错误

Question

我刚刚将我的 swift 2.3 代码转换为 3.0，但是当我尝试更改字体类型时，UILabel 视图突然显示错误。这是错误。它显示 (name: String, size: CGFloat)-> UIFont is not convertible to (name: String, size: CGFloat)-> UIFont? 为什么我不能更改字体类型？我已经清理并构建了项目，但显示相同的错误。这是 UILabel

        let placeholder = UILabel()
        placeholder.bounds = self.tableView.bounds
        placeholder.textAlignment = .Center
        placeholder.textColor = UIColor(red: 230.0/255.0, green: 230.0/255.0, blue: 230.0/255.0, alpha: 1.0)
        placeholder.font = UIFont(name: "Avenir-Light", size: 15.0)
        placeholder.text = "No Events"
        self.tableView.backgroundView = placeholder

这里是错误

Answer 1

placeholder.font = UIFont(name: "Avenir-Light", size: 15.0)

你应该尝试这样写：

placeholder.font = UIFont.init(name: "Avenir-Light", size: 15)

有关详细信息，请参阅 this

UIFont is not convertible 错误

UIFont is not convertible error

uifont

ios

swift

swift3