以编程方式在Swift中添加UIBarButtonItem动作
问题描述:
我试图通过编程方式将一个动作连接到Swift中的UIBarButtonItem,没有任何Storyboard。由于我使用不具有构造函数与库中的图标创建的UIBarButtonItem外部库(Font_Awesome_Swift
)以编程方式在Swift中添加UIBarButtonItem动作
var b = UIBarButtonItem(title: "Continue", style: .Plain, target: self, action: "sayHello")
:
我不能做这种方式。所以我这样做:
let rightButtonItem = UIBarButtonItem()
rightButtonItem.FAIcon = FAType.FACamera
然后,我想能够附加一个动作到这个UIBarButtonItem。我发现在另一个答案,这个解决方案:
UIApplication.sharedApplication().sendAction(barButtonItem.action, to: barButtonItem.target, from: self, forEvent: nil)
但我真的不明白如何使用它。我应该在哪里指出选择者的名字?
谢谢!
答
好吧,只是发表了这个问题之后,我发现了一个简单的方法来解决我的问题。随着“默认”的UIBarButtonItem构造函数和下面的代码:
let rightButtonItem = UIBarButtonItem(title: "Camera", style: .Plain, target: self, action: "launchCamera")
rightButtonItem.FAIcon = FAType.Camera
答
例如我写这篇文章的代码为的UIBarButtonItem:
navigationItem.rightBarButtonItem = UIBarButtonItem(barButtonSystemItem: .action , target: self, action: #selector(shareTapped))
和选择器代码是:
func shareTapped() {
// for share in Social media or Save in local
// let vc = UIActivityViewController(activityItems: [imageView.image!], applicationActivities: [])
// vc.popoverPresentationController?.barButtonItem = navigationItem.rightBarButtonItem
// present(vc, animated: true)
// this line its for share photo in facebook or twitter
if let vc = SLComposeViewController(forServiceType: SLServiceTypeTwitter) {
vc.setInitialText("Look at this great picture!")
vc.add(imageView.image!)
vc.add(URL(string: "http://www.photolib.noaa.gov/nssl"))
present(vc, animated: true)
}
}
和i的使用图像我的应用程序,因为这个我使用图像view.image
答
Swift使添加一个行动,UIBarButtonItem容易为我们。
let rightBarButton = UIBarButtonItem()
// add an action
rightBarButton.action = #selector(yourAction)
还有一个选项可以将操作设置为UIBarButtonItem,rightButtonItem.actiion =“sayHello”// //选择器名称 – HardikDG