2019独角兽企业重金招聘Python工程师标准>>> 
#import "AppDelegate.h"
#import "FirstViewController.h"
#import "SecondViewController.h"
#import "ThirdViewController.h"
#import "ForthViewController.h"
@interface AppDelegate ()
@end
@implementation AppDelegate
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
// Override point for customization after application launch.
_window = [[UIWindow alloc]initWithFrame:[UIScreen mainScreen].bounds];
[_window setBackgroundColor:[UIColor whiteColor]];
#pragma mark -导航控制器原理
//=======================原理===================
//1.导航控制器:是一个容器视图控制器，专门用来管理其他的视图控制器
//导航控制器管理的视图控制器在导航控制器中的存储结构是栈结构;
//2.导航控制器永远显示栈顶的那个视图视图控制器,
//3.让一个导航控制器去管理其他视图控制器的方法:
//(1).将视图控制器作为导航控制器的根视图控制器,
//(2).使用导航控制器去push出来的视图控制器,也是属于导航控制器的视图控制器
#pragma mark -导航控制器的使用
//=====================使用=============
//创建一个视图控制器，用来作为导航控制器的根视图控制器
FirstViewController *first =[[FirstViewController alloc]init];
//如果一个视图控制器作为导航控制器的根视图控制器,那么这个视图控制器就是
//导航控制器栈结构的容器中的一员(而且还是第一个添加的)
//1.创建导航控制器对象
//每个导航控制器必须至少管理一个视图，所以创建方法如下
//UINavigationController : UIViewController
UINavigationController *navigationController = [[UINavigationController alloc]initWithRootViewController:first];
//3.添加视图控制器
//push一个视图控制器到导航控制器中
//导航控制器用来将视图控制器添加到栈中的方法
// SecondViewController *second = [[SecondViewController alloc]init];
//[navigationController pushViewController:second animated:YES];
// ThirdViewController *third
//4.pop一个视图控制器就会将这个视图从导航控制器中移除,前提是这个视图控制器
//已经在这个导航控制器中,导航控制器中的根视图控制器不可以移除
//一般这个pop方法只能写在你想要移除的视图控制器中去调用;
//2.显示在window上
_window.rootViewController = navigationController;
[_window makeKeyAndVisible];
return YES;
}
@end
ForthViewController.m:
#import "ForthViewController.h"
#import "UIView+FJView.h"
@interface ForthViewController ()
@end
@implementation ForthViewController
- (void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view.
self.view.backgroundColor = [UIColor cyanColor];
//添加一个按钮
UIButton *button = [[UIButton alloc]initWithFrame:
CGRectMake(100, 100, 30, 20)];
[button setBackgroundColor:[UIColor redColor]];
[ button addTarget:self action:@selector(onClicked:)
forControlEvents:UIControlEventTouchUpInside];
self.title = @"第四页";
[self.view addSubview:button];
}
#pragma mark - 按钮点击
- (void)onClicked:(UIButton *) btn{
//1.将当前这个导航控制器最上层的视图控制器pop掉
//回到上一层视图控制器
//[self.navigationController popViewControllerAnimated:YES];
//2.将当前导航控制器pop到根视图控制器
// [self.navigationController popToRootViewControllerAnimated:YES];
//拿到当前导航控制器管理的所有的视图控制器(导航控制器管理的视图控制器全是
//导航控制器的子视图控制器)
//子视图控制器数组中数组元素得顺序和视图的添加顺序一致;
NSArray *chirlViewControllers = self.navigationController.childViewControllers;
//添加转场动画;
[self.view addTransitionAnimationWithDuration:1 animationType:FJ_pageUnCurl direction:FJ_LEFT];
//使用转场动画和push方法的区别；一个放到导航控制器上一个只是纯展示;
//3.pop到指定的视图控制器;(指定的视图控制器必须已经在导航控制器的栈结构中的对象)
[self.navigationController popToViewController:chirlViewControllers[1] animated:YES];
}
@end
ThirdViewController.m
#import "ThirdViewController.h"
#import "ForthViewController.h"
@interface ThirdViewController ()
@end
@implementation ThirdViewController
- (void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view.
self.view.backgroundColor = [UIColor blueColor];
//添加一个按钮
UIButton *button = [[UIButton alloc]initWithFrame:
CGRectMake(100, 100, 30, 20)];
[button setBackgroundColor:[UIColor redColor]];
[ button addTarget:self action:@selector(onClicked:)
forControlEvents:UIControlEventTouchUpInside];
self.title = @"第三页";
[self.view addSubview:button];
}
#pragma mark - 按钮点击
- (void)onClicked:(UIButton *) btn{
ForthViewController *forth = [[ForthViewController alloc]init];
[self.navigationController pushViewController:forth animated:YES];
}
@end
SecondViewController.m
#import "SecondViewController.h"
#import "ThirdViewController.h"
@interface SecondViewController ()
@end
@implementation SecondViewController
#pragma mark - 生命周期
- (void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view.
UIButton *button = [[UIButton alloc]initWithFrame:
CGRectMake(100, 100, 40, 20)];
button.backgroundColor = [UIColor cyanColor];
[button addTarget:self action:@selector(onclicked)
forControlEvents:UIControlEventTouchDown];
[self.view addSubview:button];
self.title = @"第二页";
[self.view setBackgroundColor:[UIColor orangeColor]];
}
#pragma mark - 按钮点击
-(void) onclicked{
//pop回到上一个界面;
//pop方法属于导航控制器;
//pop当前这个视图控制器
// - (UIViewController *)popViewControllerAnimated:(BOOL)animated;
// [self.navigationController popViewControllerAnimated:YES];
ThirdViewController *third = [[ThirdViewController alloc]init];
[self.navigationController pushViewController:third animated:YES];
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
@end
FirstViewController.m
#import "FirstViewController.h"
#import "SecondViewController.h"
@interface FirstViewController ()
@end
@implementation FirstViewController
#pragma mark -生命周期
- (void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view.
self.view.backgroundColor = [UIColor lightGrayColor];
//添加一个按钮
UIButton *button = [[UIButton alloc]initWithFrame:
CGRectMake(100, 100, 30, 20)];
[button setBackgroundColor:[UIColor redColor]];
[ button addTarget:self action:@selector(onClicked:)
forControlEvents:UIControlEventTouchUpInside];
self.title = @"第一页";
[self.view addSubview:button];
}
#pragma mark - 按钮点击
- (void)onClicked:(UIButton *) btn{
//创建一个需要push的视图控制器对象
SecondViewController *second = [[SecondViewController alloc]init];
//只有这个视图控制器添加到导航控制器上，才可以拿到导航控制器
//使用当前这个导航控制器push一个新的视图控制器;
[self.navigationController pushViewController:second animated:YES];
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
/*
#pragma mark - Navigation
// In a storyboard-based application, you will often want to do a little preparation before navigation
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
// Get the new view controller using [segue destinationViewController].
// Pass the selected object to the new view controller.
}
*/
@end