uinavigationbar

问题 I cant change navigation bar frame in ios 11. Here is sample of my code for ios 10: if let navigationBar = self.navigationController?.navigationBar { let frame = CGRect(x: navigationBar.frame.origin.x, y: navigationBar.frame.origin.y, width: navigationBar.frame.width, height: navigationBar.frame.height + 100) navigationBar.frame = frame } ios 10 and ios 11 screenshots respectively 回答1: Changing the height of the UINavigationBar is no longer directly supported in iOS 11 (see here, here & here)

问题 I'm using prefersLargeTitles on my navigation bar, When it collapse, I want to align the title to the left of the navigation bar, What I did is I create a leftBarButtonItem with a custom view of label and set the title color to .clear , the problem is, that label is visible even if the large titles didn't collapsed yet. This is my code for adding navigation item as my title let label = UILabel() label.textColor = UIColor.black label.text = "my left title" self.navigationItem.leftBarButtonItem

问题 I am struggling to hide the navigationBar , which would properly be hidden if the root controller wasn't a SwiftUI UIHostingController . I tried the following: Setting navigationController.isNavigationBarHidden = true after creating it, at viewDidLoad and viewWillAppear . Adding both .navigationBarHidden(true) and .navigationBarBackButtonHidden(true) for the UIHostingController 's rootView . Could it be an Apple bug? I am using Xcode 11.6. All my attempts together: class LoginController:

问题 I am struggling to hide the navigationBar , which would properly be hidden if the root controller wasn't a SwiftUI UIHostingController . I tried the following: Setting navigationController.isNavigationBarHidden = true after creating it, at viewDidLoad and viewWillAppear . Adding both .navigationBarHidden(true) and .navigationBarBackButtonHidden(true) for the UIHostingController 's rootView . Could it be an Apple bug? I am using Xcode 11.6. All my attempts together: class LoginController:

问题 The structure of my project is as follows. Initially when the user is registering or trying to login the initial navigation controller should work and after successfully registering / loggin in the user should be taken to first tab of tab bar controller. But the issue that i am facing is that i am getting 2 navigation bars in the tab bar view. Can someone guide me how to implement this in the correct way. Thanks in advance 回答1: Make one of the two navigation controllers from tabbar to initial

问题 The structure of my project is as follows. Initially when the user is registering or trying to login the initial navigation controller should work and after successfully registering / loggin in the user should be taken to first tab of tab bar controller. But the issue that i am facing is that i am getting 2 navigation bars in the tab bar view. Can someone guide me how to implement this in the correct way. Thanks in advance 回答1: Make one of the two navigation controllers from tabbar to initial

问题 I'm wondering if I can change the background color of just the prompt of the UINavigationBar (e.g. to red, while the rest of the navigation bar stays black), so I can use the prompt property of the UINavigationItem to display status / error messages as a one-liner. 回答1: Nope. But you can set the prompt to an empty string, and place a red-colored label on top of it. 回答2: This is an old question, but since the introduction of appearance there is a much easier way to setting prompt color (and

问题 I have a UITableView that loads content into a UIWebView like this: //MainViewController.m - (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath { CGRect bounds = [ [ UIScreen mainScreen ] applicationFrame ]; UIScrollView *scrollView = [[UIScrollView alloc] initWithFrame:bounds]; UIWebView *htmlView = [ [ UIWebView alloc ] initWithFrame:[scrollView bounds]]; htmlView.frame = CGRectMake(10,10,280,360); NSURLRequest *requestObj = [NSURLRequest

问题 I have a UITableView that loads content into a UIWebView like this: //MainViewController.m - (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath { CGRect bounds = [ [ UIScreen mainScreen ] applicationFrame ]; UIScrollView *scrollView = [[UIScrollView alloc] initWithFrame:bounds]; UIWebView *htmlView = [ [ UIWebView alloc ] initWithFrame:[scrollView bounds]]; htmlView.frame = CGRectMake(10,10,280,360); NSURLRequest *requestObj = [NSURLRequest

问题 I have a UITableView that loads content into a UIWebView like this: //MainViewController.m - (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath { CGRect bounds = [ [ UIScreen mainScreen ] applicationFrame ]; UIScrollView *scrollView = [[UIScrollView alloc] initWithFrame:bounds]; UIWebView *htmlView = [ [ UIWebView alloc ] initWithFrame:[scrollView bounds]]; htmlView.frame = CGRectMake(10,10,280,360); NSURLRequest *requestObj = [NSURLRequest