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
斯威夫特4 //隐藏导航栏阴影线
navigationController?.navigationBar.shadowImage = UIImage()
其他回答
两条线的解决方案对我来说很有效。尝试在ViewDidLoad方法中添加这个:
navigationController?.navigationBar.setValue(true, forKey: "hidesShadow")
self.extendedLayoutIncludesOpaqueBars = true
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
}
}
pxpgraphics的解决方案为Swift 2.0更新
extension UINavigationBar {
func hideBottomHairline()
{
hairlineImageViewInNavigationBar(self)?.hidden = true
}
func showBottomHairline()
{
hairlineImageViewInNavigationBar(self)?.hidden = false
}
private func hairlineImageViewInNavigationBar(view: UIView) -> UIImageView?
{
if let imageView = view as? UIImageView where imageView.bounds.height <= 1
{
return imageView
}
for subview: UIView in view.subviews
{
if let imageView = hairlineImageViewInNavigationBar(subview)
{
return imageView
}
}
return nil
}
}
extension UIToolbar
{
func hideHairline()
{
let navigationBarImageView = hairlineImageViewInToolbar(self)?.hidden = true
}
func showHairline()
{
let navigationBarImageView = hairlineImageViewInToolbar(self)?.hidden = false
}
private func hairlineImageViewInToolbar(view: UIView) -> UIImageView?
{
if let imageView = view as? UIImageView where imageView.bounds.height <= 1
{
return imageView
}
for subview: UIView in view.subviews
{
if let imageView = hairlineImageViewInToolbar(subview)
{
return imageView
}
}
return nil
}
}
我刚刚为这个创建了一个扩展…关于格式的问题很抱歉(这是我的第一个答案)。
用法:
override func viewDidLoad() {
super.viewDidLoad()
self.navigationController?.hideShadow = true
}
扩展:
UINavigationController.swift
// Created by Ricardo López Rey on 16/7/15.
import Foundation
struct UINavigationControllerExtension {
static var hideShadowKey : String = "HideShadow"
static let backColor = UIColor(red: 247/255, green: 247/255, blue: 248/255, alpha: 1.0)
}
extension UINavigationController {
var hideShadow : Bool {
get {
if let ret = objc_getAssociatedObject(self, &UINavigationControllerExtension.hideShadowKey) as? Bool {
return ret
} else {
return false
}
}
set {
objc_setAssociatedObject(self,&UINavigationControllerExtension.hideShadowKey,newValue, objc_AssociationPolicy(OBJC_ASSOCIATION_RETAIN_NONATOMIC))
if newValue {
self.navigationBar.setBackgroundImage(solidImage(UINavigationControllerExtension.backColor), forBarMetrics: UIBarMetrics.Default)
self.navigationBar.shadowImage = solidImage(UIColor.clearColor())
} else {
self.navigationBar.setBackgroundImage(nil, forBarMetrics: UIBarMetrics.Default)
}
}
}
private func solidImage(color: UIColor, size: CGSize = CGSize(width: 1,height: 1)) -> UIImage {
var rect = CGRectMake(0, 0, size.width, size.height)
UIGraphicsBeginImageContextWithOptions(size, false, 0)
color.setFill()
UIRectFill(rect)
var image: UIImage = UIGraphicsGetImageFromCurrentImageContext()
UIGraphicsEndImageContext()
return image
}
}
在子视图中找到发际线的一个很好的简短Swift函数是:
func findHairLineInImageViewUnder(view view: UIView) -> UIImageView? {
if let hairLineView = view as? UIImageView where hairLineView.bounds.size.height <= 1.0 {
return hairLineView
}
if let hairLineView = view.subviews.flatMap({self.findHairLineInImageViewUnder(view: $0)}).first {
return hairLineView
}
return nil
}