UINavigationController for iOS (3) ToolBar

IOSLearningUINavigationControllerDetails and usage(II)Page switching andSegmentedControllerNext, let's talk about the Navigation Toolbar.

 

1. Display Toolbar

Add the code in the-(void) viewDidLoad method of RootViewController. m so that Toobar is displayed.

 

    [self.navigationController  setToolbarHidden:NO animated:YES];

 

2. Add UIBarButtonItem on the ToolBar

Create several uibarbuttonitems and add them to the Toolbar as arrays.

 

UIBarButtonItem *one = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemAdd target:nil action:nil];    UIBarButtonItem *two = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemBookmarks target:nil action:nil];    UIBarButtonItem *three = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemAction target:nil action:nil];    UIBarButtonItem *four = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemEdit target:nil action:nil];    UIBarButtonItem *flexItem = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemFlexibleSpace target:nil action:nil];    [self setToolbarItems:[NSArray arrayWithObjects:flexItem, one, flexItem, two, flexItem, three, flexItem, four, flexItem, nil]];

Effect:

 

 

Note: using [self. navigationController. toolbar setItems :( NSArray *) animated: <# (BOOL) #>] This method to add an item does not work. Now, when I add a Toolbar dynamically, this will take effect.

 

3. dynamically add Toolbar

We add a dynamic Toolbar in SecondView.

Add in SecondViewController. h

 

#import <UIKit/UIKit.h>@interface SecondViewController : UIViewController{    UIToolbar *toolBar;}@end

Add in SecondViewController. m

 

 

- (void)viewDidLoad{    [super viewDidLoad];    [self.navigationController  setToolbarHidden:YES animated:YES];    UIBarButtonItem *addButton = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemSearch target:self action:@selector(gotoThridView:)];    toolBar = [[UIToolbar alloc] initWithFrame:CGRectMake(0.0, self.view.frame.size.height - toolBar.frame.size.height - 44.0, self.view.frame.size.width, 44.0)];    [toolBar setBarStyle:UIBarStyleDefault];    toolBar.autoresizingMask = UIViewAutoresizingFlexibleTopMargin;    [toolBar setItems:[NSArray arrayWithObject:addButton]];    [self.view addSubview:toolBar];         // Do any additional setup after loading the view from its nib.}

First, hide the Toobar displayed during RootView.

 

[Self. navigationController setToolbarHidden: YESanimated: YES]; then, the new Toolbar is added to the SecondView and an Item is set for Toobar.

[ToolBarsetItems: [NSArrayarrayWithObject: addButton];

BarButtonItem uses UIBarButtonSystemItemSearch. The effect is as follows:

4. Create a New ThridView and jump from SecondView

Commad + N create a ThridViewController,

This addButton jumps to ThridView

 

-(void)gotoThridView:(id)sender{    ThridViewController *thridView = [[ThridViewController alloc] init];    [self.navigationController pushViewController:thridView animated:YES];    thridView.title = @"Thrid View";}

Jump Second to Third:

 

 

At this point, the UINavigationController has been practicing almost.

Previous two articles:

IOSLearningUINavigationControllerExplanation and use (1) AddUIBarButtonItem

IOSLearningUINavigationControllerDetails and usage(II)Page switching andSegmentedController

 

 

Example code: https://github.com/schelling/YcDemo

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