- This该项目目前的样子
这是我使用的代码
func styleNavBar() { let navigationBarAppearace = UINavigationBar.appearance() navigationBarAppearace.tintColor = UIColor(red:1.0, green:1.0, blue:1.0, alpha:1.0) navigationBarAppearace.titleTextAttributes = [NSForegroundColorAttributeName:UIColor(red:1.00, green:1.00, blue:1.00, alpha:1.0)] navigationBarAppearace.translucent = true navigationBarAppearace.backgroundColor = UIColor(red: 0.0, green: 0.0, blue: 0.0, alpha: 0.3) navigationBarAppearace.setBackgroundImage(UIImage(), forBarMetrics: .Default)}
我尝试删除以下代码,但它看起来像 this .
navigationBarAppearace.setBackgroundImage(UIImage(), forBarMetrics: .Default)
我的问题是,如何让导航栏
填满顶部?并且外观仍然相同
最佳答案
首先,为 UIImage
创建一个扩展,它创建具有指定大小的纯色图像。
将此扩展保留在类标签处的任何 ViewController 中
extension UIImage {
class func imageWithColor(color: UIColor, size: CGSize) -> UIImage {
let rect = CGRect(x: 0, y: 0, width: size.width, height: size.height)
UIGraphicsBeginImageContextWithOptions(size, false, 0)
color.setFill()
UIRectFill(rect)
let image: UIImage = UIGraphicsGetImageFromCurrentImageContext()!
UIGraphicsEndImageContext()
return image
}
}
然后使用以下方法自定义您的导航栏
func styleNavBar() {
let navigationBarAppearace = UINavigationBar.appearance()
navigationBarAppearace.tintColor = UIColor(red:1.0, green:1.0, blue:1.0, alpha:1.0)
navigationBarAppearace.titleTextAttributes = [NSForegroundColorAttributeName:UIColor(red:1.00, green:1.00, blue:1.00, alpha:1.0)]
navigationBarAppearace.isTranslucent = true
let colorImage = UIImage.imageWithColor(color: UIColor(red: 0.0, green: 0.0, blue: 0.0, alpha: 0.3), size: CGSize(width: UIScreen.main.bounds.width, height: 64))
navigationBarAppearace.setBackgroundImage(colorImage, for: .default)
}
希望这能解决您的问题。
关于ios - 透明导航栏 swift iOS,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/38935607/