我想将自定义图像设置为UIBarButtonItem,但它仅在周围显示一个矩形框,并且不显示实际图像。
func setupBrowserToolbar() { let browser = UIToolbar(frame: CGRect(x: 0, y: 20, width: self.view.frame.width, height: 30)) //配置返回组件 let path = NSBundle.mainBundle().pathForResource("back", ofType: "png") let urlstr = NSURL(fileURLWithPath: path!) let data = NSData(contentsOfURL: urlstr) let btnback = UIBarButtonItem(image: UIImage(data: data!), style: UIBarButtonItemStyle.Plain, target: self, action: Selector("backClicked:")) //分割按钮1 let btngrap1 = UIBarButtonItem(barButtonSystemItem: UIBarButtonSystemItem.FlexibleSpace, target: nil, action: nil) //前进按钮 let btnforward = UIBarButtonItem(image: UIImage(named: "forward.png"), style: UIBarButtonItemStyle.Plain, target: self, action: Selector("forwardClicked:")) //分割按钮2 let btngrap2 = UIBarButtonItem(barButtonSystemItem: UIBarButtonSystemItem.FlexibleSpace, target: nil, action: nil) //重新加载 let btnreload = UIBarButtonItem(image: UIImage(named: "reload.png"), style: UIBarButtonItemStyle.Plain, target: self, action: Selector("reloadClicked:")) //分割按钮3 let btngrap3 = UIBarButtonItem(barButtonSystemItem: UIBarButtonSystemItem.FlexibleSpace, target: nil, action: nil) //停止加载 let btnstop = UIBarButtonItem(image: UIImage(named:"stop.png"), style: UIBarButtonItemStyle.Plain, target: self, action: Selector("stopClicked:")) progress = UIProgressView((frame: CGRect(x: 0, y: 48, width: self.view.frame.width-50, height: 2))) progress.progress = 0 browser.setItems([btnback, btngrap1, btnforward, btngrap2, btnreload, btngrap3, btnstop], animated: true) ptimer = NSTimer(timeInterval: 0.2, target: self, selector: Selector("loadProgress"), userInfo: nil, repeats: true) self.view.addSubview(browser) }
我的应用程序屏幕截图
上面的方法是工具栏配置,但是我不知道这是什么错误。
那是因为UIBarButtonItem图像的默认呈现模式始终将图像绘制为模板图像,而忽略其颜色信息(UIImageRenderingModeAlwaysTemplate)。只需使用UIImage的方法imageWithRenderingMode始终创建原始图像即可。
UIImage(named: "yourImageName")!.withRenderingMode(.alwaysOriginal)