swift隐藏显示导航栏的底线
//
// UIBarExtension.swift
// sinaDemo
//
// Created by admin on 17/4/21.
// Copyright © 2017年 super. All rights reserved.
// 为了隐藏导航栏的底线
import Foundation
import UIKit
extension UINavigationBar {
// 隐藏线
func hideBottomHairline() {
let navigationBarImageView = hairlineImageViewInNavigationBar(view: self)
navigationBarImageView!.isHidden = true
}
// 显示线
func showBottomHairline() {
let navigationBarImageView = hairlineImageViewInNavigationBar(view: self)
navigationBarImageView!.isHidden = false
}
private func hairlineImageViewInNavigationBar(view: UIView) -> UIImageView? {
if view.isKind(of: UIImageView.self) && view.bounds.height <= 1.0{
return (view as! UIImageView)
}
let subviews = (view.subviews as [UIView])
for subview: UIView in subviews {
if let imageView: UIImageView = hairlineImageViewInNavigationBar(view: subview) {
return imageView
}
}
return nil
}
}
extension UIToolbar {
func hideHairline() {
let navigationBarImageView = hairlineImageViewInToolbar(view: self)
navigationBarImageView!.isHidden = true
}
func showHairline() {
let navigationBarImageView = hairlineImageViewInToolbar(view: self)
navigationBarImageView!.isHidden = false
}
private func hairlineImageViewInToolbar(view: UIView) -> UIImageView? {
if view.isKind(of: UIImageView.self) && view.bounds.height <= 1.0{
return (view as! UIImageView)
}
let subviews = (view.subviews as [UIView])
for subview: UIView in subviews {
if let imageView: UIImageView = hairlineImageViewInToolbar(view: subview) {
return imageView
}
}
return nil
}
}
// 隐藏调用
// 为了控制导航栏的状态颜色 和 底线
override func viewWillAppear(_ animated: Bool) {
super.viewWillAppear(true)
UIApplication.shared.statusBarStyle = .lightContent
let navigationBar = self.navigationController?.navigationBar
navigationBar?.hideBottomHairline()
}
// 显示调用
override func viewWillDisappear(_ animated: Bool) {
let navigationBar = self.navigationController?.navigationBar
navigationBar?.showBottomHairline()
}
