我试图以编程方式在Swift中将动作连接到我的UIBarButtonItem,而不使用任何故事板。
我不能这样做:
var b = UIBarButtonItem(title: "Continue", style: .Plain, target: self, action: "sayHello")
因为我使用的外部库(Font_Awesome_Swift
)没有构造函数来创建带有库中图标的UIBarButtonItem。所以我这样做:
let rightButtonItem = UIBarButtonItem()
rightButtonItem.FAIcon = FAType.FACamera
然后,我希望能够将动作附加到此UIBarButtonItem。我在另一个答案中找到了这个解决方案:
UIApplication.sharedApplication().sendAction(barButtonItem.action, to: barButtonItem.target, from: self, forEvent: nil)
但我真的不懂如何使用它。我应该在哪里指出选择器的名称?
谢谢!
答案 0 :(得分:1)
好的,在发布此问题之后,我找到了解决问题的简单方法......使用“默认”UIBarButtonItem构造函数和以下代码:
let rightButtonItem = UIBarButtonItem(title: "Camera", style: .Plain, target: self, action: "launchCamera")
rightButtonItem.FAIcon = FAType.Camera
答案 1 :(得分:1)
Swift为我们添加了一个对UIBarButtonItem很容易的动作。
let rightBarButton = UIBarButtonItem()
// add an action
rightBarButton.action = #selector(yourAction)
答案 2 :(得分:0)
例如我为UIBarButtonItem写了这段代码:
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)
}
}
我在我的应用程序中使用图像,因此我使用图像view.image