【UINavigationController】
导航控制器
步骤
1，初始化
2，push 进入新视图
3，pop 返回
返回到指定视图
//通过导航控制器找到所有的界面
NSArray *controllers =self.navigationController.viewControllers;
//返回到固定界面 （前提是要返回到的视图控制器对象存在）
[self.navigationController popToViewController:[controllers objectAtIndex:1] animated:YES];
【self.navigationController.navigationBar】
//[UINavigationBar appearance]这种方式也能找到navigationBar导航条。
【导航条的设置是针对整个导航的，会影响当前导航中的所有页面】
//导航条的隐藏状态
//self.navigationController.navigationBarHidden = YES;
@property(nonatomic,getter=isNavigationBarHidden) BOOL navigationBarHidden;
- (void)setNavigationBarHidden:(BOOL)hidden animated:(BOOL)animated;
//导航条的背景色
@property(nonatomic,retain) UIColor *barTintColor;
//内容渲染颜色
@property(nonatomic,retain) UIColor *tintColor;
//是否半透明(这个设置对起始坐标点{0,0}的影响权限最高)
@property(nonatomic,assign,getter=isTranslucent) BOOL translucent;
//背景图
- (void)setBackgroundImage:(UIImage *)backgroundImage forBarMetrics:(UIBarMetrics)barMetrics;
【UIBarButtonItem】
//导航条专用按钮
//四种创建方式
- (id)initWithTitle:(NSString *)title style:(UIBarButtonItemStyle)style target:(id)target action:(SEL)action;
- (id)initWithImage:(UIImage *)image style:(UIBarButtonItemStyle)style target:(id)target action:(SEL)action;
- (id)initWithBarButtonSystemItem:(UIBarButtonSystemItem)systemItem target:(id)target action:(SEL)action;
- (id)initWithCustomView:(UIView *)customView;
//UIBarButtonSystemItemFlexibleSpace，是自带的一种空的item，可以当作占位符用
【self.navigationItem】
//给导航条设置专用按钮和titleView
//title
@property(nonatomic,copy) NSString *title;
//中间的view
@property(nonatomic,retain) UIView *titleView;
//隐藏自带的返回按钮
@property(nonatomic,assign) BOOL hidesBackButton;
- (void)setHidesBackButton:(BOOL)hidesBackButton animated:(BOOL)animated;
//左边和右边的专用按钮
@property(nonatomic,retain) UIBarButtonItem *leftBarButtonItem;
@property(nonatomic,retain) UIBarButtonItem *rightBarButtonItem;
- (void)setLeftBarButtonItem:(UIBarButtonItem *)item animated:(BOOL)animated;
- (void)setRightBarButtonItem:(UIBarButtonItem *)item animated:(BOOL)animated;
//左边和右边的专用按钮组（数组中存放的是UIBarButtonItem）
@property(nonatomic,copy) NSArray *leftBarButtonItems;
@property(nonatomic,copy) NSArray *rightBarButtonItems;
- (void)setLeftBarButtonItems:(NSArray *)items animated:(BOOL)animated;
- (void)setRightBarButtonItems:(NSArray *)items animated:(BOOL)animated;
【self.navigationController.toolbar】工具条
//每个导航控制器都自带有一个工具栏，是一个UIToolBar的对象,显示在最底部，尺寸（320*44）,工具栏默认处于隐藏状态
//注意：自带的这个工具条一般情况下都不用。如果要用的话我们会自己创建一个新的UIToolBar
//工具条隐藏状态
//self.navigationController.toolbarHidden = NO;
@property(nonatomic,getter=isToolbarHidden) BOOL toolbarHidden;
- (void)setToolbarHidden:(BOOL)hidden animated:(BOOL)animated;
//背景色
@property(nonatomic,retain) UIColor *barTintColor;
//内容渲染颜色
@property(nonatomic,retain) UIColor *tintColor;
//是否半透明
@property(nonatomic,assign,getter=isTranslucent) BOOL translucent;
【上面的属性和navigationBar的使用方式一样】
//设置背景图片
- (void)setBackgroundImage:(UIImage *)backgroundImage forToolbarPosition:(UIBarPosition)topOrBottom barMetrics:(UIBarMetrics)barMetrics;
//UIBarPosition中的枚举值只支持iOS7
//UIToolbarPositionBottom(在iOS7和7以前的操作系统都适用)
//UIToolbarPositionBottom 理解（每个UIView都可以指定TopBar 和BottomBar）,导航控制器中工具栏是作为导航控制器view的BottomBar被自动创建出来的
给toolBar设置专用button(数组中也是UIBarButtonItem)
//让viewController直接设置
//self.toolbarItems = array;
@property (nonatomic, retain) NSArray *toolbarItems;
- (void)setToolbarItems:(NSArray *)toolbarItems animated:(BOOL)animated;
#import "AppDelegate.h"
#import "FirstViewController.h"
@implementation AppDelegate
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
// Override point for customization after application launch.
//创建一个页面
FirstViewController *fvc = [[FirstViewController alloc] init];
//使用一个页面创建一个导航控制器
UINavigationController *nc = [[UINavigationController alloc] initWithRootViewController:fvc];
//将导航控制器和window关联
self.window.rootViewController = nc;
self.window.backgroundColor = [UIColor whiteColor];
[self.window makeKeyAndVisible];
return YES;
}
#import "FirstViewController.h"
#import "SecondViewController.h"
@interface FirstViewController ()
@end
@implementation FirstViewController
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
if (self) {
// Custom initialization
}
return self;
}
- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{
SecondViewController *svc = [[SecondViewController alloc] init];
//通过页面找到nc，让nc推出一个新的页面
[self.navigationController pushViewController:svc animated:YES];
}
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view.
self.view.backgroundColor = [UIColor redColor];
[self setNavigationBar];
}
- (void)setNavigationBar
{
//设置导航条的隐藏状态（导航条是属于导航控制器的）
self.navigationController.navigationBarHidden = NO;
//通过页面找到nc，通过nc找到导航条
//对导航条的设置是针对整个nc的
//self.navigationController.navigationBar
//设置背景色
self.navigationController.navigationBar.barTintColor = [UIColor brownColor];
//设置导航条内容（比如说自带的返回按钮）的渲染色
self.navigationController.navigationBar.tintColor = [UIColor purpleColor];
//设置半透明状态，如果写成NO，那么坐标{0,0}的位置是导航条的左下角
//如果写成YES，坐标{0,0}的位置在左上角
//在iOS7以前状态栏的高度是20，导航条高度是44，分开计算的
//从iOS7开始，合并计算高度为64
self.navigationController.navigationBar.translucent = NO;
//设置背景图片，如果图片的大小是320*44（640*88）就会显示成iOS7之前风格
//如果图片的大小不是320*44（640*88），就会用新风格并且平铺
//在主流的设计中，图片的大小需要和导航条匹配（320*64）
[self.navigationController.navigationBar setBackgroundImage:[UIImage imageNamed:@"aa"] forBarMetrics:UIBarMetricsDefault];
//设置整个导航中，导航条上title的文字属性，属性是通过字典来设置的
//字典里放的就是文字属性的键值对
self.navigationController.navigationBar.titleTextAttributes = [NSDictionary dictionaryWithObjectsAndKeys:[UIFont systemFontOfSize:10], NSFontAttributeName, [UIColor greenColor], NSForegroundColorAttributeName, nil];
}
#import "SecondViewController.h"
#import "ThirdViewController.h"
@interface SecondViewController ()
@end
@implementation SecondViewController
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
if (self) {
// Custom initialization
}
return self;
}
- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{
ThirdViewController *tvc = [[ThirdViewController alloc] init];
[self.navigationController pushViewController:tvc animated:YES];
}
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view.
self.view.backgroundColor = [UIColor orangeColor];
UIButton *btn = [UIButton buttonWithType:UIButtonTypeSystem];
btn.frame = CGRectMake(60, 70, 100, 40);
btn.backgroundColor = [UIColor grayColor];
[btn setTitle:@"返回" forState:UIControlStateNormal];
[btn addTarget:self action:@selector(backClick) forControlEvents:UIControlEventTouchUpInside];
[self.view addSubview:btn];
[self setNavigationItem];
}
- (void)setNavigationItem
{
//设置显示在导航条上的title，针对于当前页面的
//下一个页面自带的返回按钮上的文字就是当前页的title
self.navigationItem.title = @"oyeah~";
//设置当前页面显示在导航条上的元素
//self.navigationItem
UILabel *tView = [[UILabel alloc] initWithFrame:CGRectMake(0, 0, 60, 30)];
tView.backgroundColor = [UIColor magentaColor];
tView.text = @"gogo";
tView.textAlignment = NSTextAlignmentCenter;
//设置当前页面在导航条中间显示的view
self.navigationItem.titleView = tView;
//隐藏自带的返回按钮
self.navigationItem.hidesBackButton = YES;
/**********下面是专用按钮的四种创建方法*************/
//1，使用文字创建一个专用按钮
UIBarButtonItem *abbi = [[UIBarButtonItem alloc] initWithTitle:@"ab" style:UIBarButtonItemStyleDone target:self action:@selector(click)];
//设置当前页面中显示在导航条左边的专用按钮
self.navigationItem.leftBarButtonItem = abbi;
//设置专用按钮上的文字属性（这个设置只对abbi生效）
[abbi setTitleTextAttributes:[NSDictionary dictionaryWithObjectsAndKeys:[UIFont systemFontOfSize:30], NSFontAttributeName, [UIColor blackColor], NSForegroundColorAttributeName, nil] forState:UIControlStateNormal];
//2，使用图片创建专用按钮(只取图片的形状，不取颜色)
UIBarButtonItem *bbbi = [[UIBarButtonItem alloc] initWithImage:[UIImage imageNamed:@"logo_title"] style:UIBarButtonItemStyleDone target:self action:@selector(click)];
//设置当前页面中显示在导航条右边的专用按钮
// self.navigationItem.rightBarButtonItem = bbbi;
//3，使用系统自带的图标创建专用按钮
UIBarButtonItem *cbbi = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemTrash target:self action:@selector(click)];
// self.navigationItem.rightBarButtonItem = cbbi;
//有一个btn
UIButton *btn = [UIButton buttonWithType:UIButtonTypeContactAdd];
[btn addTarget:self action:@selector(click) forControlEvents:UIControlEventTouchUpInside];
//4，使用自定义的view来创建专用按钮（一般都是用btn）
UIBarButtonItem *dbbi = [[UIBarButtonItem alloc] initWithCustomView:btn];
// self.navigationItem.rightBarButtonItem = dbbi;
//设置右边的一组专用按钮
self.navigationItem.rightBarButtonItems = [NSArray arrayWithObjects:bbbi, cbbi, dbbi, nil];
}
- (void)click
{
NSLog(@"%s",__func__);
}
- (void)backClick
{
//通过页面找到nc，让nc返回到上一面（效果和原理都跟nc自带的返回按钮一样）
[self.navigationController popViewControllerAnimated:YES];
}
#import "ThirdViewController.h"
#import "ForthViewController.h"
@interface ThirdViewController ()
@end
@implementation ThirdViewController
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
if (self) {
// Custom initialization
}
return self;
}
- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{
ForthViewController *fvc = [[ForthViewController alloc] init];
[self.navigationController pushViewController:fvc animated:YES];
}
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view.
self.view.backgroundColor = [UIColor yellowColor];
UIButton *btn = [UIButton buttonWithType:UIButtonTypeSystem];
btn.frame = CGRectMake(60, 70, 100, 40);
btn.backgroundColor = [UIColor grayColor];
[btn setTitle:@"返回" forState:UIControlStateNormal];
[btn addTarget:self action:@selector(backClick) forControlEvents:UIControlEventTouchUpInside];
[self.view addSubview:btn];
}
- (void)backClick
{
//返回到根（沿途所有页面全部销毁）
[self.navigationController popToRootViewControllerAnimated:YES];
}
- (void)viewWillAppear:(BOOL)animated
{
NSLog(@"%s",__func__);
}
- (void)viewDidAppear:(BOOL)animated
{
NSLog(@"%s",__func__);
}
- (void)viewWillDisappear:(BOOL)animated
{
NSLog(@"%s",__func__);
}
- (void)viewDidDisappear:(BOOL)animated
{
NSLog(@"%s",__func__);
}
#import "ForthViewController.h"
@interface ForthViewController ()
@end
@implementation ForthViewController
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
if (self) {
// Custom initialization
NSLog(@"%s",__func__);
}
return self;
}
- (void)viewWillAppear:(BOOL)animated
{
NSLog(@"%s",__func__);
}
- (void)viewDidAppear:(BOOL)animated
{
NSLog(@"%s",__func__);
}
- (void)viewWillDisappear:(BOOL)animated
{
NSLog(@"%s",__func__);
}
- (void)viewDidDisappear:(BOOL)animated
{
NSLog(@"%s",__func__);
}
- (void)dealloc
{
NSLog(@"%s",__func__);
}
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view.
NSLog(@"%s",__func__);
self.view.backgroundColor = [UIColor greenColor];
UIButton *btn = [UIButton buttonWithType:UIButtonTypeSystem];
btn.frame = CGRectMake(60, 70, 100, 40);
btn.backgroundColor = [UIColor grayColor];
[btn setTitle:@"返回" forState:UIControlStateNormal];
[btn addTarget:self action:@selector(backClick) forControlEvents:UIControlEventTouchUpInside];
[self.view addSubview:btn];
}
- (void)backClick
{
//找到当前导航控制器里所有的页面
NSArray *viewControllerArr = self.navigationController.viewControllers;
//找到固定的页面，用父类指针指向
UIViewController *orVC = [viewControllerArr objectAtIndex:1];
//让nc回到固定页面（必须是在nc中已经存在的，同时沿途所有页面销毁）
[self.navigationController popToViewController:orVC animated:YES];
}