iOS 11 - 无法更改导航栏高度 [英] iOS 11 - Unable to change Navigation Bar height
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问题描述
我正在开发一个应用程序，我刚刚升级到Xcode 9 / Swift 4，并且还将我的iPhone升级到了iOS 11.
当我安装iOS 11时，应用程序已经安装好，直到我从Xcode中。现在我陷入了默认的NavBar高度。
我用来更改高度的代码不再有效：
class CustomNavControllerVC：UINavigationController
{
let navBarHeight：CGFloat = 64.0
let navbarBackButtonColor = UIColor（红色：247/255，绿色：179 / 255，蓝色：20/255，alpha：1）
覆盖func viewDidLoad（）
{
super.viewDidLoad（）
print（ CustomNavControllerVC> viewDidLoad）
}
覆盖func viewDidLayoutSubviews（）
{
print（CustomNavControllerVC> viewDidLayoutSubviews）
super.viewDidLayoutSubviews（）
navigationBar.frame.size.height = navBarHeight
navigationBar.tintColor = navbarBackButtonColor
}
覆盖func didReceiveMemoryWarning（）
{
super.didReceiveMemoryWarning（）
//处理任何资源可以重新创建。
}
}
//在我的VC中
覆盖func viewDidLoad（）
{
customizeNavBar （）
}
func customizeNavBar（）
{
让navbarBackItem = UIBarButtonItem（）
navbarBackItem.title =Înapoi
navigationItem.backBarButtonItem = navbarBackItem
让navbarImageView = UIImageView（frame：CGRect（x：0，y：0，width：55，height：20））
navbarImageView.contentMode = .scaleToFill
让navbarLogo = UIImage（名称：NavBarLogo.png）
navbarImageView.image = navbarLogo
navigationItem.titleView = navbarImageView
}
到目前为止，我在这个问题上唯一能找到的是：
设置自定义NavigationBar类
添加TestView +设置SafeArea
ViewController.swift
import UIKit
class ViewController：UIViewController {
var navbar：UINavigationBar！
@IBOutlet weak var testView：UIView！
覆盖func viewDidLoad（）{
super.viewDidLoad（）
//更新NavigationBar的框架
self.navigationController？.navigationBar.sizeToFit（）
print（NavigationBar Frame：\（String（describe：self.navigationController！.navigationBar.frame）））
}
//隐藏状态栏
覆盖var prefersStatusBarHidden：Bool {
返回true
}
覆盖func viewDidAppear（_ animated：Bool）{
super.viewDidAppear（false）
//重要！
if #available（iOS 11.0，*）{
//默认NavigationBar高度为44.自定义NavigationBar高度为66.所以我们应该将additionalSafeAreaInsets设置为66-44 = 22
self.additionalSafeAreaInsets.top = 22
}
}
覆盖func didReceiveMemoryWarning（）{
super.didReceiveMemoryWarning（）
//处置可以重新创建的任何资源。
}
}
SecondViewController.swift
import UIKit
class SecondViewController：UIViewController {
override func viewDidLoad （）{
super.viewDidLoad（）
//加载视图后进行任何其他设置。
//创建BackButton
var backButton：UIBarButtonItem！
let backImage = imageFromText（Back，font：UIFont.systemFont（ofSize：16），maxWidth：1000，color：UIColor.white）
backButton = UIBarButtonItem（image：backImage，style：UIBarButtonItemStyle。 plain，target：self，action：#selector（SecondViewController.back（_ :)））
self.navigationItem.leftBarButtonItem = backButton
self.navigationItem.leftBarButtonItem？.setBackgroundVerticalPositionAdjustment（-10 ，for：UIBarMetrics.default）
}
覆盖var prefersStatusBarHidden：Bool {
返回true
}
@ objc func back（_ sender：UITabBarItem）{
self.navigationController？.popViewController（animated：true）
}
// Helper函数：获取字符串CGSize
func sizeOfAttributeString（_ str：NSAttributedString，maxWidth：CGFloat） - > CGSize {
let size = str.boundingRect（with：CGSize（width：maxWidth，height：1000），options：（NSStringDrawingOptions.usesLineFragmentOrigin），context：nil）.size
return size
}
//帮助函数：将字符串转换为UIImage
func imageFromText（_ text：NSString，font：UIFont，maxWidth：CGFloat，color：UIColor） - > UIImage
{
let paragraph = NSMutableParagraphStyle（）
paragraph.lineBreakMode = NSLineBreakMode.byWordWrapping
paragraph.alignment = .center //这可能也是一个输入参数，但是我猜测在大多数用例中我们想要居中对齐
let attributionString = NSAttributedString（string：text as String，attributes：[NSAttributedStringKey.font：font，NSAttributedStringKey.foregroundColor：color，NSAttributedStringKey.paragraphStyle：paragraph]）
let size = sizeOfAttributeString（attributedString，maxWidth：maxWidth）
UIGraphicsBeginImageContextWithOptions（size，false，0.0）
attributedString.draw（in：CGRect（x：0，y：0） ，width：size.width，height：size.height））
let image = UIGraphicsGetImageFromCurrentImageContext（）
UIGraphicsEndImageContext（）
返回图片！
}
覆盖func didReceiveMemoryWarning（）{
super.didReceiveMemoryWarning（）
//处置任何资源可以重新创建。
}
}
黄色是barbackgroundView。黑色不透明度是BarContentView。
我删除了BarContentView的backgroundColor。
就是这样。
I am working on an application and I just upgraded to Xcode 9 / Swift 4 and also upgraded my iPhone to iOS 11. The application was installed when I installed iOS 11 and all seemed OK until I run it from Xcode. Now I am stuck with the default NavBar height.
The code I was using to change the height is no longer working:
class CustomNavControllerVC: UINavigationController
{
let navBarHeight : CGFloat = 64.0
let navbarBackButtonColor = UIColor(red: 247/255, green: 179/255, blue: 20/255, alpha: 1)
override func viewDidLoad()
{
super.viewDidLoad()
print("CustomNavControllerVC > viewDidLoad")
}
override func viewDidLayoutSubviews()
{
print("CustomNavControllerVC > viewDidLayoutSubviews")
super.viewDidLayoutSubviews()
navigationBar.frame.size.height = navBarHeight
navigationBar.tintColor = navbarBackButtonColor
}
override func didReceiveMemoryWarning()
{
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
}
// In my VCs
override func viewDidLoad()
{
customizeNavBar()
}
func customizeNavBar()
{
let navbarBackItem = UIBarButtonItem()
navbarBackItem.title = "Înapoi"
navigationItem.backBarButtonItem = navbarBackItem
let navbarImageView = UIImageView(frame: CGRect(x: 0, y: 0, width: 55, height: 20))
navbarImageView.contentMode = .scaleToFill
let navbarLogo = UIImage(named: "NavBarLogo.png")
navbarImageView.image = navbarLogo
navigationItem.titleView = navbarImageView
}
So far the only thing I could find on this issue is this:
iOS 11 navigation bar height customizing
iOS11 customize navigation bar height
How to correctly set UINavigationBar height in iOS 11
But the info provided does not help, unfortunately.
Any ideas / suggestions?
解决方案
Updated 2017.10.6
I had the same problem. Below is my solution. I assume that height size is 66.
My solution is working fine iOS 10, 11.
Please choose my answer if it helps you.
Create NavgationBar.swift
import UIKit
class NavigationBar: UINavigationBar {
//set NavigationBar's height
var customHeight : CGFloat = 66
override func sizeThatFits(_ size: CGSize) -> CGSize {
return CGSize(width: UIScreen.main.bounds.width, height: customHeight)
}
override func layoutSubviews() {
super.layoutSubviews()
frame = CGRect(x: frame.origin.x, y: 0, width: frame.size.width, height: customHeight)
// title position (statusbar height / 2)
setTitleVerticalPositionAdjustment(-10, for: UIBarMetrics.default)
for subview in self.subviews {
var stringFromClass = NSStringFromClass(subview.classForCoder)
if stringFromClass.contains("BarBackground") {
subview.frame = CGRect(x: 0, y: 0, width: self.frame.width, height: customHeight)
subview.backgroundColor = .yellow
}
stringFromClass = NSStringFromClass(subview.classForCoder)
if stringFromClass.contains("BarContent") {
subview.frame = CGRect(x: subview.frame.origin.x, y: 20, width: subview.frame.width, height: customHeight - 20)
subview.backgroundColor = UIColor(red: 20/255, green: 20/255, blue: 20/255, alpha: 0.4)
}
}
}
}
Set Storyboard
Set Custom NavigationBar class
Add TestView + Set SafeArea
ViewController.swift
import UIKit
class ViewController: UIViewController {
var navbar : UINavigationBar!
@IBOutlet weak var testView: UIView!
override func viewDidLoad() {
super.viewDidLoad()
//update NavigationBar's frame
self.navigationController?.navigationBar.sizeToFit()
print("NavigationBar Frame : \(String(describing: self.navigationController!.navigationBar.frame))")
}
//Hide Statusbar
override var prefersStatusBarHidden: Bool {
return true
}
override func viewDidAppear(_ animated: Bool) {
super.viewDidAppear(false)
//Important!
if #available(iOS 11.0, *) {
//Default NavigationBar Height is 44. Custom NavigationBar Height is 66. So We should set additionalSafeAreaInsets to 66-44 = 22
self.additionalSafeAreaInsets.top = 22
}
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
}
SecondViewController.swift
import UIKit
class SecondViewController: UIViewController {
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view.
// Create BackButton
var backButton: UIBarButtonItem!
let backImage = imageFromText("Back", font: UIFont.systemFont(ofSize: 16), maxWidth: 1000, color:UIColor.white)
backButton = UIBarButtonItem(image: backImage, style: UIBarButtonItemStyle.plain, target: self, action: #selector(SecondViewController.back(_:)))
self.navigationItem.leftBarButtonItem = backButton
self.navigationItem.leftBarButtonItem?.setBackgroundVerticalPositionAdjustment(-10, for: UIBarMetrics.default)
}
override var prefersStatusBarHidden: Bool {
return true
}
@objc func back(_ sender: UITabBarItem){
self.navigationController?.popViewController(animated: true)
}
//Helper Function : Get String CGSize
func sizeOfAttributeString(_ str: NSAttributedString, maxWidth: CGFloat) -> CGSize {
let size = str.boundingRect(with: CGSize(width: maxWidth, height: 1000), options:(NSStringDrawingOptions.usesLineFragmentOrigin), context:nil).size
return size
}
//Helper Function : Convert String to UIImage
func imageFromText(_ text:NSString, font:UIFont, maxWidth:CGFloat, color:UIColor) -> UIImage
{
let paragraph = NSMutableParagraphStyle()
paragraph.lineBreakMode = NSLineBreakMode.byWordWrapping
paragraph.alignment = .center // potentially this can be an input param too, but i guess in most use cases we want center align
let attributedString = NSAttributedString(string: text as String, attributes: [NSAttributedStringKey.font: font, NSAttributedStringKey.foregroundColor: color, NSAttributedStringKey.paragraphStyle:paragraph])
let size = sizeOfAttributeString(attributedString, maxWidth: maxWidth)
UIGraphicsBeginImageContextWithOptions(size, false , 0.0)
attributedString.draw(in: CGRect(x: 0, y: 0, width: size.width, height: size.height))
let image = UIGraphicsGetImageFromCurrentImageContext()
UIGraphicsEndImageContext()
return image!
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
}
Yellow is barbackgroundView. Black opacity is BarContentView.
And I removed BarContentView's backgroundColor.
That's It.
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