第一步  AppDelegate中引用导航器，并设置根视图，同时隐藏导航栏- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {    self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];    // Override point for customization after application launch.    self.window.backgroundColor = [UIColor whiteColor];    [self.window makeKeyAndVisible];        ViewController1 *viewCtrl1 = [[ViewController1 alloc] init];    UINavigationController *navi = [[UINavigationController alloc] initWithRootViewController:viewCtrl1];    navi.navigationBarHidden = YES;    self.window.rootViewController = navi;        return YES;}第二步   设置一个方法Function，并让他继承UIViewController  然后在.m文件中实现这些方法，并在.h中声明//封装按钮- (UIButton *)gzybutton:(NSString *)image andFrame:(CGRect)frame0 andAction:(SEL)action0{    UIButton *btn = [UIButton buttonWithType:UIButtonTypeCustom];    UIImage *image1 = [UIImage imageNamed:image];    [btn setImage:image1 forState:UIControlStateNormal];    [btn addTarget:self action:action0 forControlEvents:UIControlEventTouchUpInside];    btn.frame = frame0;    [self.view addSubview:btn];    return btn;}//封装视图- (UIImageView *)gzyView :(NSString *)image0 andFram :(CGRect)fram{    UIImageView *imageView = [[UIImageView alloc] initWithFrame:fram];    UIImage *image = [UIImage imageNamed:image0];    [imageView setImage:image];    [self.view addSubview:imageView];    return imageView;}//封装所有日文按钮- (UIButton *) japanNextFram :(CGRect)fram andAction :(SEL)action{    UIButton *btn3 = [UIButton buttonWithType:UIButtonTypeCustom];    btn3.frame = fram;    //    btn3.backgroundColor = [UIColor clearColor];    btn3.backgroundColor = [UIColor clearColor];    [btn3 addTarget:self action:action forControlEvents:UIControlEventTouchUpInside];    [self.view addSubview:btn3];    return btn3;}//广告按钮的封装- (UIButton *) creatAdBtn :(NSString *)title andFram :(CGRect)fram andAct :(SEL)act{    UIButton *btn = [UIButton buttonWithType:UIButtonTypeCustom];    [btn setTitle:title forState:UIControlStateNormal];    [btn setTitleColor:[UIColor purpleColor] forState:UIControlStateNormal];    btn.frame = fram;    btn.backgroundColor = [UIColor grayColor];    [btn addTarget:self action:act forControlEvents:UIControlEventTouchUpInside];    [self.view addSubview:btn];    return btn;}

后面新建UIViewController的子类的时候直接继承function即可#import "Function.h"@interface ViewController1 : Function@end.m文件中的代码就变得很简单了 - (void) creatView{    [self gzyView:@"main_Bg" andFram:CGRectMake(0, 0, 320, 580)];}- (void) creatBtn{    [self gzybutton:@"main_study" andFrame:CGRectMake(10, 400, 93, 163)  andAction:@selector(nextStep)];}新建一个push跳转到下个类的对象- (void) nextStep{    ViewController2 *viewCtrl2 = [[ViewController2 alloc] init];    [self.navigationController pushViewController:viewCtrl2 animated:YES];}这是pop返回上个类的对象- (void) back{    [self.navigationController popViewControllerAnimated:YES];}这个按钮方法代表跳转到模态视图- (void) jumpAd :(UIButton *)sender{    AdViewController *adViewCtrl = [[AdViewController alloc] init];    UINavigationController *navi = [[UINavigationController alloc] initWithRootViewController:adViewCtrl];    navi.navigationBarHidden = NO;//    [self presentModalViewController:navi animated:YES];    [self presentViewController:navi animated:YES completion:nil];    }