Ios 如何在swift 3中以编程方式设置barButtonItem的操作?
这是我以前用过的Ios 如何在swift 3中以编程方式设置barButtonItem的操作?,ios,swift,selector,swift3,uibarbuttonitem,Ios,Swift,Selector,Swift3,Uibarbuttonitem,这是我以前用过的 var barButtonItem = UIBarButtonItem(image: backImgs, style: UIBarButtonItemStyle.plain, target: self, action: Selector("menuButtonTapped:")) 但是Swift 3的语法有一些变化。例如: navigationItem.rightBarButtonItem = UIBarButtonItem(title: "Add", style: .pla
var barButtonItem = UIBarButtonItem(image: backImgs, style: UIBarButtonItemStyle.plain, target: self, action: Selector("menuButtonTapped:"))
但是Swift 3的语法有一些变化。例如:
navigationItem.rightBarButtonItem = UIBarButtonItem(title: "Add", style: .plain, target: self, action: #selector(addTapped))
从Swift 3开始,您只需更改
选择器
语法,您需要在函数调用中指定方法的第一个参数名,因此请按如下方式更改选择器
#selector(menuButtonTapped(sender:))
func menuButtonTapped(sender: UIBarButtonItem) {
}
你的方法应该是这样的
#selector(menuButtonTapped(sender:))
func menuButtonTapped(sender: UIBarButtonItem) {
}
iOS 10.1的Swift 3上有一行代码:
navigationController?.navigationBar.topItem?.rightBarButtonItem = UIBarButtonItem(title: "Add", style: .plain, target: self, action: nil)
总结Swift 3中为按钮添加操作的常用方法
navigationItem.rightBarButtonItem = UIBarButtonItem(title: "Add", style: .plain, target: self, action: #selector(addTapped))
navigationItem.rightBarButtonItem = UIBarButtonItem(image: UIImage(named:"add"), style: .plain, target: self, action: #selector(addTapped))
navigationItem.rightBarButtonItem = UIBarButtonItem(barButtonSystemItem: .add, target: self, action: #selector(addTapped))
制作一个uibarbuttonite:
let rightButton: UIBarButtonItem = UIBarButtonItem(title: "Done", style: UIBarButtonItemStyle.done, target: self, action: #selector(LocationViewController.doneButtonClicked(_:)))
添加到NavigationItem:
self.navigationItem.rightBarButtonItem = rightButton
相关功能:
func doneButtonClicked(_ button:UIBarButtonItem!){
print("Done clicked")
}
如果有人正在使用
customView
:
barButtonItem.customView?.addGestureRecognizer(UITapGestureRecognizer(target: self, action: #selector(onBarButtonItemClicked)))
为barbutton项创建扩展
extension UINavigationItem {
func addSettingButtonOnRight(){
let button = UIButton(type: .Custom)
button.setTitle("setting", forState: .Normal)
button.titleLabel?.font = UIFont.systemFontOfSize(15.0)
button.layer.cornerRadius = 5
button.backgroundColor = UIColor.grayColor()
button.frame = CGRect(x: 0, y: 0, width: 100, height: 25)
button.addTarget(self, action: #selector(gotSettingPage), forControlEvents: UIControlEvents.TouchUpInside)
let barButton = UIBarButtonItem(customView: button)
self.rightBarButtonItem = barButton
}
func gotSettingPage(){
}
}
并从viewDidLoad()调用它
在Swift 3中,你可以像这样添加uibarbuttonite
let addButton = UIBarButtonItem(image:UIImage(named:"your_icon_name"), style:.plain, target:self, action:#selector(YourControllerName.buttonAction(_:)))
addButton.tintColor = UIColor.white
self.navigationItem.rightBarButtonItem = addButton
func buttonAction(_ sender: UIBarButtonItem) {
}
像这样处理按钮动作
let addButton = UIBarButtonItem(image:UIImage(named:"your_icon_name"), style:.plain, target:self, action:#selector(YourControllerName.buttonAction(_:)))
addButton.tintColor = UIColor.white
self.navigationItem.rightBarButtonItem = addButton
func buttonAction(_ sender: UIBarButtonItem) {
}
希望有帮助。对于Swift 4加载项
viewDidLoad
:
navigationItem.rightBarButtonItem = UIBarButtonItem(
barButtonSystemItem: UIBarButtonSystemItem.add,
target: self,
action: #selector(addTransaction)
)
如果有人正在寻找在现有按钮(Swift 5)上设置操作的方法: 斯威夫特5
//For righter button item
let rightBtn = UIBarButtonItem(image: UIImage(named: "rightmenu"), style: .plain, target: self, action: #selector(onClickMethod))//Change your function name and image name here
self.navigationItem.rightBarButtonItem = rightBtn
//self.navigationItem.rightBarButtonItem = [rightBtn, anotherBtn] //If you want to add more buttons add like this
//For left bar button item
let leftBtn = UIBarButtonItem(image: UIImage(named: "rightmenu"), style: .plain, target: self, action: #selector(onClickMethod)) //Change your function name and image name here
self.navigationItem.leftItemsSupplementBackButton = true
self.navigationItem.leftBarButtonItem = leftBtn
//self.navigationItem.leftBarButtonItems = [leftBtn, anotherBtn] //If you want to add more buttons add like this
//This is your function name
@objc func onClickMethod() {
print("Left bar button item")
}
在swift 3中,我必须指定第一个参数,但我不需要这样做。。无论如何thanks@Bhanupriya是的,您可以,但为此,您需要使用带有选择器的
\code>\selector(menubuttonapped(:)
,并且还需要将\uu
作为第一个参数添加到方法中,如func menubuttonapped(u.发送方:uibarbuttoneim){
您必须以其他方式使用的选项中的任何一个都不起作用。@Bhanupriya您是否得到了我在上述注释中告诉您的有关选择器的信息?不,我不需要。我需要的是:var barButtonItem=UIBarButtonItem(图像:backImgs,样式:。plain,目标:self,操作:#选择器(menubuttonapped))@Bhanupriya那么,为什么您以前尝试使用选择器(“menuButtonTapped:”)
此处:
表示方法包含一个参数,这就是我以这种方式给出答案的原因。谢谢!这节省了我的时间。我会单击向上箭头,但它位于69,所以我们暂时不谈。@JackDerbis如果在使用自定义视图时需要将手势识别器添加到条形按钮项中,这将起作用。
初始值设定项。据我所知,只有此方法签名有效(将手势添加到视图本身/添加到工具栏按钮/任何其他操作都不适用于我)。太好了。它也适用于Swift 4和更低版本。