(有码)UI导航控制器目标动作机制传值

注意:工程中没有使用系统默认的ViewController.m

目标动作传值

//AppDelegate.m文件

#import "AppDelegate.h"

#import "OneViewController.h"

@interface AppDelegate ()

@end

@implementation AppDelegate

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {

    self.window = [[UIWindow alloc]initWithFrame:[UIScreen mainScreen].bounds];

    [self.window makeKeyAndVisible];

    OneViewController *oneViewController = [[OneViewController alloc]init];

    //设置oneViewController为导航控制器的根视图

    UINavigationController *nvc = [[UINavigationController alloc]initWithRootViewController:oneViewController];

    self.window.rootViewController = nvc;

    return YES;

}

//OneViewController.m文件

#import "OneViewController.h"

#import "TwoViewController.h"

@interface OneViewController ()

@end

@implementation OneViewController

- (void)viewDidLoad {

    [super viewDidLoad];

    self.view.backgroundColor = [UIColor whiteColor];

}

//创建第二个导航控制器页面 实现目标动作方法

- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event{

    TwoViewController *twoViewController = [[TwoViewController alloc]init];

    [self.navigationController pushViewController:twoViewController animated:YES];

    [twoViewController addTarget:self action:@selector(titleNameBack:)];

}

//传值

- (void)titleNameBack:(NSString *)string{

    self.navigationItem.title = string;

}

//SecondController.m

- (void)viewDidLoad {

    [super viewDidLoad];

    self.view.backgroundColor = [UIColor whiteColor];

    //创建返回按钮

    self.navigationItem.leftBarButtonItem = [[UIBarButtonItem alloc]initWithTitle:@"返回" style:UIBarButtonItemStyleDone target:self action:@selector(btnClick)];

}

//调用目标动作机制

- (void)btnClick{

    [self.target performSelector:self.action withObject:@"第二个页面"];

    [self.navigationController popViewControllerAnimated:YES];

}

//保存全局变量

- (void)addTarget:(id)target action:(SEL)action{

    _target = target;

    _action = action;

}