浅谈 iOS设计之多视图—模态视图的基本操作

设计的基本思路为:首先先创建一个工程  之后在工程上创建三个类(  FirstViewController  SecondViewController ThirdViewController)

首先在 AppDelegate中创建根是视图  代码如下

  AppDelegate.h

#import <UIKit/UIKit.h>
#import "FirstViewController.h"
@interface AppDelegate : UIResponder <UIApplicationDelegate>

@property (strong, nonatomic) UIWindow *window;

 

@end

 AppDelegate.m

#import "AppDelegate.h"

@interface AppDelegate ()

@end

@implementation AppDelegate


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

    

 

 FirstViewController *firstVc=[[FirstViewController alloc]init];

    //创建根视图

    self.window.rootViewController=firstVc;
    self.window.backgroundColor=[UIColor grayColor];
   
   
    return YES;

}

 

下面好就是在工程上创建的三个类进行操作

 

FirstViewController.h

 

#import <UIKit/UIKit.h>

 

#import "SecondViewController.h"

@interface FirstViewController : UIViewController

//声明按钮属性

@property(strong,nonatomic)UIButton *Button;

 

@end

 

对第一个类的操作

  FirstViewController.m

#import "FirstViewController.h"

@interface FirstViewController ()

@end

@implementation FirstViewController

- (void)viewDidLoad {

    [super viewDidLoad];

    //设置主视图的背景色

    self.view.backgroundColor=[UIColor greenColor];

//创建按钮

    self.Button=[[UIButton alloc]initWithFrame:CGRectMake(100, 200, 50, 50)];
    self.Button.backgroundColor=[UIColor redColor];
    [self.Button setTitle:@"Next" forState:UIControlStateNormal];
    //调用方法实现进入下一页面
    [self.Button addTarget:self action:@selector(nextPage) forControlEvents:UIControlEventTouchUpInside];
    [self.view addSubview:self.Button];

}

 

//进入下一页的方法时间
-(void)nextPage
{
    SecondViewController *secondVc=[[SecondViewController alloc]init];
    [self presentViewController:secondVc animated:YES completion:^{
   
       NSLog(@"欢迎进入本页面");
    }];
 
}

 

- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];

 }

/*
#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

对第二个类的操作

 SecondViewController.h

 

#import <UIKit/UIKit.h>
#import "ThirdViewController.h"
@interface SecondViewController : UIViewController
@property(strong,nonatomic)UIButton *Button;

@end

 

SecondViewController.m

#import "SecondViewController.h"

@interface SecondViewController ()

@end

@implementation SecondViewController

- (void)viewDidLoad {
    [super viewDidLoad];
  
    self.view.backgroundColor=[UIColor yellowColor];
    //返回按钮
    self.Button=[[UIButton alloc]initWithFrame:CGRectMake(100, 200, 50, 50)];
    [self.Button setTitle:@"Back" forState:UIControlStateNormal];
    [self.Button setTitleColor:[UIColor redColor] forState:UIControlStateNormal];
    //调用方法实现返回上一页
    [self.Button addTarget:self action:@selector(textFrontPage) forControlEvents:UIControlEventTouchUpInside];
    [self.view addSubview:self.Button];
   
    //进入下一页的按钮
    self.Button=[[UIButton alloc]initWithFrame:CGRectMake(200, 200, 50, 50)];
    [self.Button setTitle:@"Next" forState:UIControlStateNormal];
    [self.Button setTitleColor:[UIColor redColor] forState:UIControlStateNormal];
    //调用方法实现进入下一页
    [self.Button addTarget:self action:@selector(nextPage) forControlEvents:UIControlEventTouchUpInside];
    [self.view addSubview:self.Button];




}

//返回上一页的方法
-(void)textFrontPage
{
    [self dismissViewControllerAnimated:YES completion:^{
   
      NSLog(@"front page show");
    }];

}

-(void)nextPage
{
    ThirdViewController *thirdVC=[[ThirdViewController alloc]init];
    [self presentViewController:thirdVC animated:YES completion:^{
     NSLog(@"欢迎进入本页");
   
    }];

}
- (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

对第三个类的操作

 ThirdViewController.h

 

#import <UIKit/UIKit.h>
#import "FirstViewController.h"
@interface ThirdViewController : UIViewController
@property(strong,nonatomic)UIButton *Button;

@end

 ThirdViewController.m

 

#import "ThirdViewController.h"

@interface ThirdViewController ()

@end

@implementation ThirdViewController

- (void)viewDidLoad {
    [super viewDidLoad];
  
    self.view.backgroundColor=[UIColor blueColor];
    //返回按钮
    self.Button=[[UIButton alloc]initWithFrame:CGRectMake(100, 200, 50, 50)];
    [self.Button setTitle:@"Back" forState:UIControlStateNormal];
    [self.Button setTitleColor:[UIColor redColor] forState:UIControlStateNormal];
    //调用方法实现返回上一页
    [self.Button addTarget:self action:@selector(textFrontPage) forControlEvents:UIControlEventTouchUpInside];
    [self.view addSubview:self.Button];
   
    //进入首页按钮
    self.Button=[[UIButton alloc]initWithFrame:CGRectMake(200, 200, 50, 50)];
    [self.Button setTitle:@"Next" forState:UIControlStateNormal]; ;
    [self.Button setTitleColor:[UIColor redColor ] forState:UIControlStateNormal];
    //调用方法实现进入首页
    [self.Button addTarget:self action:@selector(nextPage) forControlEvents:UIControlEventTouchUpInside];
    [self.view addSubview:self.Button];
   
   
   
   
}

//返回方法
-(void)textFrontPage
{
    [self dismissViewControllerAnimated:YES completion:^{
      NSLog(@"Front page show");
     
    }];

}
//进入下一页的方法
-(void)nextPage
{
    FirstViewController *firstVc=[[FirstViewController alloc]init];
    [self presentViewController:firstVc animated:YES completion:^{
   
    NSLog(@"欢迎进入本页");
     
    }];
}
- (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

 

 

结果效果图

点击视图上的“Back”和“Next”按钮就会返回上一页和进入下一页