我一直在寻找这种解决方案已有一段时间,但是没有任何解决方案。例如一个解决方案是
self.navigationItem.setRightBarButtonItem(UIBarButtonItem(barButtonSystemItem: .Stop, target: self, action: nil), animated: true)
此代码将添加带有“停止”图像的按钮。就像这样,还有其他解决方案,例如“搜索,刷新”等。但是 ,如果我想以编程方式在想要的图像上添加按钮,该怎么办?
自定义按钮图片,未设置按钮框:
您可以使用init(image: UIImage?, style: UIBarButtonItemStyle, target: Any?, action: Selector?)指定的图像和其他属性来初始化新项目。
init(image: UIImage?, style: UIBarButtonItemStyle, target: Any?, action: Selector?)
let button1 = UIBarButtonItem(image: UIImage(named: "imagename"), style: .plain, target: self, action: Selector("action")) // action:#selector(Class.MethodName) for swift 3 self.navigationItem.rightBarButtonItem = button1
检查此Apple文档。参考
对于Swift 3.0
Swift 3.0
let btn1 = UIButton(type: .custom) btn1.setImage(UIImage(named: "imagename"), for: .normal) btn1.frame = CGRect(x: 0, y: 0, width: 30, height: 30) btn1.addTarget(self, action: #selector(Class.Methodname), for: .touchUpInside) let item1 = UIBarButtonItem(customView: btn1) let btn2 = UIButton(type: .custom) btn2.setImage(UIImage(named: "imagename"), for: .normal) btn2.frame = CGRect(x: 0, y: 0, width: 30, height: 30) btn2.addTarget(self, action: #selector(Class.MethodName), for: .touchUpInside) let item2 = UIBarButtonItem(customView: btn2) self.navigationItem.setRightBarButtonItems([item1,item2], animated: true)
FORSwift 2.0及以上
Swift 2.0
let btnName = UIButton() btnName.setImage(UIImage(named: "imagename"), forState: .Normal) btnName.frame = CGRectMake(0, 0, 30, 30) btnName.addTarget(self, action: Selector("action"), forControlEvents: .TouchUpInside) //.... Set Right/Left Bar Button item let rightBarButton = UIBarButtonItem() rightBarButton.customView = btnName self.navigationItem.rightBarButtonItem = rightBarButton
或者干脆使用的init(customView :)喜欢 let rightBarButton = UIBarButtonItem(customView: btnName) self.navigationItem.rightBarButtonItem = rightBarButton
或者干脆使用的init(customView :)喜欢
let rightBarButton = UIBarButtonItem(customView: btnName) self.navigationItem.rightBarButtonItem = rightBarButton
对于系统UIBarButtonItem
let camera = UIBarButtonItem(barButtonSystemItem: .Camera, target: self, action: Selector("btnOpenCamera")) self.navigationItem.rightBarButtonItem = camera
如果要设置多于1个项目,请使用rightBarButtonItems或用于左侧leftBarButtonItems
rightBarButtonItems
leftBarButtonItems
let btn1 = UIButton() btn1.setImage(UIImage(named: "img1"), forState: .Normal) btn1.frame = CGRectMake(0, 0, 30, 30) btn1.addTarget(self, action: Selector("action1:"), forControlEvents: .TouchUpInside) let item1 = UIBarButtonItem() item1.customView = btn1 let btn2 = UIButton() btn2.setImage(UIImage(named: "img2"), forState: .Normal) btn2.frame = CGRectMake(0, 0, 30, 30) btn2.addTarget(self, action: Selector("action2:"), forControlEvents: .TouchUpInside) let item2 = UIBarButtonItem() item2.customView = btn2 self.navigationItem.rightBarButtonItems = [item1,item2]
使用setLeftBarButtonItem或setRightBarButtonItem
setLeftBarButtonItem
setRightBarButtonItem
let btn1 = UIButton() btn1.setImage(UIImage(named: "img1"), forState: .Normal) btn1.frame = CGRectMake(0, 0, 30, 30) btn1.addTarget(self, action: Selector("action1:"), forControlEvents: .TouchUpInside) self.navigationItem.setLeftBarButtonItem(UIBarButtonItem(customView: btn1), animated: true);
对于> = 2.2的快速动作#selector(Class.MethodName),例如btnName.addTarget(self, action: #selector(Class.MethodName), forControlEvents: .TouchUpInside)
#selector(Class.MethodName)
btnName.addTarget(self, action: #selector(Class.MethodName), forControlEvents: .TouchUpInside)