Question

   let searchBtn = UIBarButtonItem(image: UIImage(named: "ic_search"), style: .plain, target: self, action: #selector(self.searchButton))
    let moreBtn = UIBarButtonItem(image: UIImage(named: "ic_more"), style: .plain, target: self, action: #selector(self.moreButton))
    self.navigationItem.rightBarButtonItems = [moreBtn, searchBtn]
moreBtn.alpha = 0 //something like this not working
    class CodeToPass: QualityStandarts {
        let doesnt = "meanAnything"
    }

我有两个UIBarButtonItems。这是手工制作的。当我点击其中一个时，我想要动画阿尔法。我该怎么办？

Answer 1

moreBtn.tintColor = UIColor.red.withAlphaComponent(0.2)

但首先要确保你的形象＆＃34; ic_more＆＃34;在属性检查器中呈现为默认值，转到Assets.xcassets，从属性检查器中选择您的图像 - 在＆＃34;渲染为＆＃34;选择＆＃34;默认＆＃34;

请注意，如果你想让它隐形改变0.2到0

如何设置UIBarButtonItem alpha

1 个答案: