UI2_视图切换ViewController

//
//  SubViewController.h
//  UI2_视图切换
//
//  Created by zhangxueming on 15/7/3.
//  Copyright (c) 2015年 zhangxueming. All rights reserved.
//

#import <UIKit/UIKit.h>

@interface SubViewController : UIViewController

@end

//
//  SubViewController.m
//  UI2_视图切换
//
//  Created by zhangxueming on 15/7/3.
//  Copyright (c) 2015年 zhangxueming. All rights reserved.
//

#import "SubViewController.h"

@interface SubViewController ()

@end

@implementation SubViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view.
    self.view.backgroundColor = [UIColor cyanColor];

    UIButton *btn = [UIButton buttonWithType:UIButtonTypeSystem];
    btn.frame = CGRectMake(20, 300, self.view.frame.size.width-40, 50);
    btn.backgroundColor = [UIColor whiteColor];
    [btn setTitle:@"视图切换" forState:UIControlStateNormal];
    [btn addTarget:self action:@selector(btnClicked) forControlEvents:UIControlEventTouchUpInside];
    [self.view addSubview:btn];
}

- (void)btnClicked
{
    NSLog(@"-----");
    if (self.view.superview) {
        [self.view removeFromSuperview];
    }
}

- (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

//
//  RootViewController.h
//  UI2_视图切换
//
//  Created by zhangxueming on 15/7/3.
//  Copyright (c) 2015年 zhangxueming. All rights reserved.
//

#import <UIKit/UIKit.h>

@interface RootViewController : UIViewController

@end

//
//  RootViewController.m
//  UI2_视图切换
//
//  Created by zhangxueming on 15/7/3.
//  Copyright (c) 2015年 zhangxueming. All rights reserved.
//

#import "RootViewController.h"
#import "SubViewController.h"

@interface RootViewController ()
{
    SubViewController *_svc;
}
@end

@implementation RootViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view.
    self.view.backgroundColor = [UIColor redColor];

    _svc = [[SubViewController alloc] init];

    UIButton *btn = [UIButton buttonWithType:UIButtonTypeSystem];
    btn.frame = CGRectMake(20, 200, self.view.frame.size.width-40, 50);
    [btn setTitle:@"视图切换" forState:UIControlStateNormal];
    btn.backgroundColor = [UIColor whiteColor];
    [btn addTarget:self action:@selector(btnClicked) forControlEvents:UIControlEventTouchUpInside];
    [self.view addSubview:btn];
}

- (void)btnClicked
{
    [self.view addSubview:_svc.view];
}

- (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

//
//  AppDelegate.m
//  UI2_视图切换
//
//  Created by zhangxueming on 15/7/3.
//  Copyright (c) 2015年 zhangxueming. All rights reserved.
//

#import "AppDelegate.h"
#import "RootViewController.h"

@interface AppDelegate ()

@end

@implementation AppDelegate

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
    // Override point for customization after application launch.
    RootViewController *rootViewController = [[RootViewController alloc] init];
    self.window.rootViewController = rootViewController;
    return YES;
}