Question

我的UIBarButtonItem定义如下：

let cardNavButton: UIBarButtonItem = UIBarButtonItem(image: UIImage(named: "card")!, style: UIBarButtonItemStyle.Bordered, target: self, action: self.headerCardButtonSelector)
self.navigationItem.rightBarButtonItem = cardNavButton
cardNavButton.tintColor = UIColor.whiteColor()

当用户点击按钮时，其颜色会发生变化。如何定义用户点按按钮时显示的颜色？

此按钮中显示的图像有多种颜色，但只显示一种颜色。我怎么能改变它？

Answer 1

您可以使用自定义UIButton创建UIBarButtonItem，并为状态设置正确的颜色。

            let customButton: UIButton = UIButton()
            //customize yout custom button
            let cardNavButton: UIBarButtonItem = UIBarButtonItem(customView: customButton)
            self.navigationItem.rightBarButtonItem = cardNavButton

Answer 2

假设“s”是正确的十六进制值字符串，例如绿色“00ff00”，点击按钮时使用此代码：

/Users/guy/.rvm/gems/ruby-2.3.0/gems/writeexcel-1.0.5/lib/writeexcel/chart.rb
:79:in 'factory': undefined method 'new' for nil:NilClass (NoMethodError)
        from /Users/guy/.rvm/gems/ruby-2.3.0/gems/writeexcel-1.0.5/lib/writee
xcel/workbook.rb:334:in 'add_chart'
        from excelGraph.rb:18:in '<main>'

点击按钮时更改UIBarButtonItem tintColor？

2 个答案: