以编程方式添加导航栏iOS [英] Adding Navigation Bar programmatically iOS
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问题描述
我正在尝试使用导航栏(后退按钮,标题等)和标签栏(底部的工具栏)制作应用程序。我正在使用子视图,所以我不必担心状态栏,导航栏,标签栏高度等。但我认为这给我带来麻烦,因为我似乎无法弄清楚如何设置导航和标签栏。
I am trying to make an App with a Navigation Bar (Back button, title, etc) and a Tab Bar (Toolbar on the bottom). I am using subviews so I don't have to worry about the status bar, navigation bar, tab bar heights, etc. But I think it's causing me trouble because I can't seem to figure out how to setup the Nav and Tab Bars.
这就是我所拥有的。我做错了什么?
Here is what I have. What am I doing wrong?
AppDelegate.h
AppDelegate.h
(default for single view app)
AppDelegate.m
AppDelegate.m
(default for single view app)
ViewController.h
ViewController.h
#import <UIKit/UIKit.h>
@interface ViewController : UIViewController
@property (strong, nonatomic) UIView *contentSubview;
@end
ViewController.m
ViewController.m
#import "ViewController.h"
@interface ViewController ()
@end
@implementation ViewController
- (void)loadView{}
- (void)viewDidLoad
{
[super viewDidLoad];
UIView *view = [[UIView alloc] init];
view.backgroundColor = [UIColor greenColor];
self.contentSubview = [[UIView alloc] init];
self.contentSubview.backgroundColor = [UIColor orangeColor];
[view addSubview:self.contentSubview];
self.view = view;
}
- (void)viewWillLayoutSubviews
{
[super viewWillLayoutSubviews];
self.contentSubview.frame = CGRectMake(
0,
self.topLayoutGuide.length,
CGRectGetWidth(self.view.frame),
CGRectGetHeight(self.view.frame)-self.topLayoutGuide.length-self.bottomLayoutGuide.length
);
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
@end
推荐答案
-(void)ViewDidLoad
{
UINavigationBar* navbar = [[UINavigationBar alloc] initWithFrame:CGRectMake(0, 0, self.view.frame.size.width, 50)];
UINavigationItem* navItem = [[UINavigationItem alloc] initWithTitle:@"karthik"];
// [navbar setBarTintColor:[UIColor lightGrayColor]];
UIBarButtonItem* cancelBtn = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemCancel target:self action:@selector(onTapCancel:)];
navItem.leftBarButtonItem = cancelBtn;
UIBarButtonItem* doneBtn = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemDone target:self action:@selector(onTapDone:)];
navItem.rightBarButtonItem = doneBtn;
[navbar setItems:@[navItem]];
[self.view addSubview:navbar];
}
-(void)onTapDone:(UIBarButtonItem*)item{
}
-(void)onTapCancel:(UIBarButtonItem*)item{
}
Swift3
let navigationBar = UINavigationBar(frame: CGRect(x: 0, y: 0, width: view.frame.size.width, height:44)) // Offset by 20 pixels vertically to take the status bar into account
navigationBar.backgroundColor = UIColor.white
// Create a navigation item with a title
let navigationItem = UINavigationItem()
navigationItem.title = "Title"
// Create left and right button for navigation item
let leftButton = UIBarButtonItem(title: "Save", style: .plain, target: self, action: #selector(ViewController.btn_clicked(_:)))
let rightButton = UIBarButtonItem(title: "Right", style: .plain, target: self, action: nil)
// Create two buttons for the navigation item
navigationItem.leftBarButtonItem = leftButton
navigationItem.rightBarButtonItem = rightButton
// Assign the navigation item to the navigation bar
navigationBar.items = [navigationItem]
// Make the navigation bar a subview of the current view controller
self.view.addSubview(navigationBar)
func btn_clicked(_ sender: UIBarButtonItem) {
// Do something
}
Swift
// Create the navigation bar
let navigationBar = UINavigationBar(frame: CGRectMake(0, 0, self.view.frame.size.width, 44)) // Offset by 20 pixels vertically to take the status bar into account
navigationBar.backgroundColor = UIColor.whiteColor()
navigationBar.delegate = self;
// Create a navigation item with a title
let navigationItem = UINavigationItem()
navigationItem.title = "Title"
// Create left and right button for navigation item
let leftButton = UIBarButtonItem(title: "Save", style: UIBarButtonItemStyle.Plain, target: self, action: "btn_clicked:")
let rightButton = UIBarButtonItem(title: "Right", style: UIBarButtonItemStyle.Plain, target: self, action: nil)
// Create two buttons for the navigation item
navigationItem.leftBarButtonItem = leftButton
navigationItem.rightBarButtonItem = rightButton
// Assign the navigation item to the navigation bar
navigationBar.items = [navigationItem]
// Make the navigation bar a subview of the current view controller
self.view.addSubview(navigationBar)
func btn_clicked(sender: UIBarButtonItem) {
// Do something
}
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