我有一个应用程序,有时需要它的导航栏融入内容。
有人知道怎么去掉或者改变这个烦人的小条的颜色吗?
在下图中,我说的是根视图控制器下面1px的高度线
我有一个应用程序,有时需要它的导航栏融入内容。
有人知道怎么去掉或者改变这个烦人的小条的颜色吗?
在下图中,我说的是根视图控制器下面1px的高度线
当前回答
在AppDelegate中,这已经全局地改变了导航栏的格式:
func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool {
UINavigationBar.appearance().setBackgroundImage(UIImage(), forBarPosition: UIBarPosition.Any, barMetrics: UIBarMetrics.Default)
UINavigationBar.appearance().shadowImage = UIImage()
UINavigationBar.appearance().tintColor = UIColor.whiteColor()
UINavigationBar.appearance().barTintColor = UIColor.redColor()
UINavigationBar.appearance().translucent = false
UINavigationBar.appearance().clipsToBounds = false
UINavigationBar.appearance().backgroundColor = UIColor.redColor()
UINavigationBar.appearance().titleTextAttributes = [NSFontAttributeName : (UIFont(name: "FONT NAME", size: 18))!, NSForegroundColorAttributeName: UIColor.whiteColor()] }
还没有在特定的VC上实现任何不同的东西,但这将帮助90%的人
其他回答
如果你只是想使用纯色导航条,并且已经在你的故事板中设置了它,在你的AppDelegate类中使用下面的代码通过外观代理删除1像素的边界:
[[UINavigationBar appearance] setBackgroundImage:[[UIImage alloc] init]
forBarPosition:UIBarPositionAny
barMetrics:UIBarMetricsDefault];
[[UINavigationBar appearance] setShadowImage:[[UIImage alloc] init]];
你应该在UISearchBar的底部添加一个视图
let rect = searchController.searchBar.frame;
let lineView : UIView = UIView.init(frame: CGRect.init(x: 0, y: rect.size.height-1, width: rect.size.width, height: 1))
lineView.backgroundColor = UIColor.init(hexString: "8CC73E")
searchController.searchBar.addSubview(lineView)
想把Serhii回答的Swift版本加进去。我用下面的代码创建了一个uibareextension .swift:
import Foundation
import UIKit
extension UINavigationBar {
func hideBottomHairline() {
self.hairlineImageView?.isHidden = true
}
func showBottomHairline() {
self.hairlineImageView?.isHidden = false
}
}
extension UIToolbar {
func hideBottomHairline() {
self.hairlineImageView?.isHidden = true
}
func showBottomHairline() {
self.hairlineImageView?.isHidden = false
}
}
extension UIView {
fileprivate var hairlineImageView: UIImageView? {
return hairlineImageView(in: self)
}
fileprivate func hairlineImageView(in view: UIView) -> UIImageView? {
if let imageView = view as? UIImageView, imageView.bounds.height <= 1.0 {
return imageView
}
for subview in view.subviews {
if let imageView = self.hairlineImageView(in: subview) { return imageView }
}
return nil
}
}
这里有一个非常重要的注意事项——改变UIViewController的navigationItem的外观比直接改变navigationBar要灵活得多。
为什么这么问?
For the simple reason that the navigationItem is tied to a single UIViewController and represents the state of the navigationBar for that particular UIViewController. This is big, as you don't have to handle the navigation bar changes between different view controllers within viewWillAppear (or something similar), as you would if you mutated the navigationBar; which is, remember, shared between all view controllers of a given navigation stack (UINavigationController), and changing it in one place changes it for all view controllers up to the stack.
你只要为一个特定的视图控制器设置正确的UINavigationBarAppearance, UIKit就会正确地更新导航栏样式,这取决于当前哪个视图控制器是导航堆栈上的顶视图控制器。
navigationItem.standardAppearance` = `UINavigationBarAppearance()
从iOS 13开始,就有一个系统API来设置或删除阴影
UIKit使用shadowImage和shadowColor属性来确定阴影的 外观。当shadowImage为nil时,该工具条显示默认的着色阴影 根据shadowColor属性中的值。如果shadowColor为nil或 包含clearColor颜色,条显示没有阴影。
let appearance = UINavigationBarAppearance()
appearance.shadowImage = nil
appearance.shadowColor = nil
navigationController.navigationBar.standardAppearance = appearance
https://developer.apple.com/documentation/uikit/uibarappearance/3198009-shadowimage