模態視圖在ios開發中用處非常廣

ios開發中。在當前視圖上再彈出一個視圖（模態視圖）。實現一個簡單的多視圖應用，以下給大家寫個demo

一 。

//
//  AppDelegate.h
//  模態視圖
//

#import <UIKit/UIKit.h>

@interface AppDelegate : UIResponder <UIApplicationDelegate>

@property (strong, nonatomic) UIWindow *window;


@end

//
//  AppDelegate.m
//  模態視圖


#import "AppDelegate.h"

@interface AppDelegate ()

@end

@implementation AppDelegate


- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
    // Override point for customization after application launch.
    return YES;
}

- (void)applicationWillResignActive:(UIApplication *)application {
    // Sent when the application is about to move from active to inactive state. This can occur for certain types of temporary interruptions (such as an incoming phone call or SMS message) or when the user quits the application and it begins the transition to the background state.
    // Use this method to pause ongoing tasks, disable timers, and throttle down OpenGL ES frame rates. Games should use this method to pause the game.
}

- (void)applicationDidEnterBackground:(UIApplication *)application {
    // Use this method to release shared resources, save user data, invalidate timers, and store enough application state information to restore your application to its current state in case it is terminated later.
    // If your application supports background execution, this method is called instead of applicationWillTerminate: when the user quits.
}

- (void)applicationWillEnterForeground:(UIApplication *)application {
    // Called as part of the transition from the background to the inactive state; here you can undo many of the changes made on entering the background.
}

- (void)applicationDidBecomeActive:(UIApplication *)application {
    // Restart any tasks that were paused (or not yet started) while the application was inactive. If the application was previously in the background, optionally refresh the user interface.
}

- (void)applicationWillTerminate:(UIApplication *)application {
    // Called when the application is about to terminate. Save data if appropriate. See also applicationDidEnterBackground:.
}

@end

//
//  ViewController.h
//  模態視圖


#import <UIKit/UIKit.h>

@interface ViewController : UIViewController


@end

//
//  ViewController.m
//  模態視圖
//


#import "ViewController.h"
#import "ModalViewController.h"
@interface ViewController ()

@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    
    self.view.backgroundColor = [UIColor groupTableViewBackgroundColor];
    
    //加入彈出模態視圖按鈕
    UIButton *btn = [UIButton buttonWithType:UIButtonTypeRoundedRect];
    btn.frame = CGRectMake(120, 220, 80, 40);
    [btn setTitle:@"模態視圖" forState:UIControlStateNormal];
    [btn addTarget:self action:@selector(btnTouch) forControlEvents:UIControlEventTouchUpInside];
    
    [self.view addSubview:btn];
    // Do any additional setup after loading the view, typically from a nib.
}

-(void)btnTouch
{
    ModalViewController *modalView = [[ModalViewController alloc]init];
    modalView.modalPresentationStyle = UIModalTransitionStyleCoverVertical;
    [self presentViewController:modalView animated:YES completion:^{
      
    }];
    
}
- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

@end

//
//  ModalViewController.h
//  模態視圖


#import <UIKit/UIKit.h>

@interface ModalViewController : UIViewController

@end

//
//  ModalViewController.m
//  模態視圖
//
/

#import "ModalViewController.h"

@interface ModalViewController ()

@end

@implementation ModalViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    
    self.view.backgroundColor = [UIColor purpleColor];
    UIButton *btn = [UIButton buttonWithType:UIButtonTypeRoundedRect];
    btn.frame = CGRectMake(130, 50, 60, 20);
    
    [btn setTitle:@"返回" forState:UIControlStateNormal];
    
    [btn addTarget:self action:@selector(btnTouchBack) forControlEvents:UIControlEventTouchUpInside];
    
    [self.view addSubview:btn];
    
    // Do any additional setup after loading the view.
}


-(void)btnTouchBack
{
    [self dismissViewControllerAnimated:YES completion:^{
        
    }];
}
- (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

模態視圖-多視圖應用