UI3_视图切换

//

//  ViewController.m

//  UI3_视图切换

//

//  Created by zhangxueming on 15/7/3.

//  Copyright (c) 2015年 zhangxueming. All rights reserved.

//



#import "ViewController.h"

#import "SecondViewController.h"

#import "ThirdViewController.h"

#import "FourthViewController.h"



@interface ViewController ()



@end



@implementation ViewController



- (void)viewDidLoad {

    [super viewDidLoad];

    // Do any additional setup after loading the view, typically from a nib.

    self.view.backgroundColor = [UIColor redColor];

    

    SecondViewController *secondVC = [[SecondViewController alloc] init];

    ThirdViewController *thirdVC = [[ThirdViewController alloc] init];

    FourthViewController *fouthVC = [[FourthViewController alloc] init];

    

    [self addChildViewController:secondVC];

    [self addChildViewController:thirdVC];

    [self addChildViewController:fouthVC];

    

    NSLog(@"count = %li", self.childViewControllers.count);

    

    UIButton *btn1 = [UIButton buttonWithType:UIButtonTypeSystem];

    btn1.frame = CGRectMake(20, 100, self.view.frame.size.width-40, 50);

    btn1.backgroundColor = [UIColor whiteColor];

    [btn1 setTitle:@"按钮1" forState:UIControlStateNormal];

    [btn1 addTarget:self action:@selector(btnClicked:) forControlEvents:UIControlEventTouchUpInside];

    btn1.tag = 100;

    [self.view addSubview:btn1];

    

    UIButton *btn2 = [UIButton buttonWithType:UIButtonTypeSystem];

    btn2.frame = CGRectMake(20, 200, self.view.frame.size.width-40, 50);

    btn2.backgroundColor = [UIColor whiteColor];

    [btn2 setTitle:@"按钮2" forState:UIControlStateNormal];

    [btn2 addTarget:self action:@selector(btnClicked:) forControlEvents:UIControlEventTouchUpInside];

    btn2.tag = 101;

    [self.view addSubview:btn2];

    

    UIButton *btn3 = [UIButton buttonWithType:UIButtonTypeSystem];

    btn3.frame = CGRectMake(20, 300, self.view.frame.size.width-40, 50);

    btn3.backgroundColor = [UIColor whiteColor];

    [btn3 setTitle:@"按钮3" forState:UIControlStateNormal];

    [btn3 addTarget:self action:@selector(btnClicked:) forControlEvents:UIControlEventTouchUpInside];

    btn3.tag = 102;

    [self.view addSubview:btn3];

}





- (void)btnClicked:(UIButton *)btn

{

    //self.childViewControllers

    if (btn.tag==100) {

        [self.view addSubview:((UIViewController *)[self.childViewControllers objectAtIndex:0]).view];

    }

    else if(btn.tag ==101)

    {

        [self.view addSubview:((UIViewController *)[self.childViewControllers objectAtIndex:1]).view];

    }

    else if(btn.tag ==102)

    {

        [self.view addSubview:((UIViewController *)[self.childViewControllers objectAtIndex:2]).view];

    }

}

- (void)didReceiveMemoryWarning {

    [super didReceiveMemoryWarning];

    // Dispose of any resources that can be recreated.

}



@end

 

//

//  FourthViewController.m

//  UI3_视图切换

//

//  Created by zhangxueming on 15/7/3.

//  Copyright (c) 2015年 zhangxueming. All rights reserved.

//



#import "FourthViewController.h"



@interface FourthViewController ()



@end



@implementation FourthViewController



- (void)viewDidLoad {

    [super viewDidLoad];

    // Do any additional setup after loading the view.

    self.view.backgroundColor = [UIColor yellowColor];

    UIButton *btn = [UIButton buttonWithType:UIButtonTypeSystem];

    btn.frame = CGRectMake(20, 100, self.view.frame.size.width-40, 50);

    btn.backgroundColor = [UIColor whiteColor];

    [btn setTitle:@"按钮" forState:UIControlStateNormal];

    [btn addTarget:self action:@selector(btnClicked) forControlEvents:UIControlEventTouchUpInside];

    [self.view addSubview:btn];

}



- (void)btnClicked

{

    if (self.view.superview) {

        //移除子视图

        [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

 

//

//  ThirdViewController.m

//  UI3_视图切换

//

//  Created by zhangxueming on 15/7/3.

//  Copyright (c) 2015年 zhangxueming. All rights reserved.

//



#import "ThirdViewController.h"



@interface ThirdViewController ()



@end



@implementation ThirdViewController



- (void)viewDidLoad {

    [super viewDidLoad];

    // Do any additional setup after loading the view.

    self.view.backgroundColor = [UIColor greenColor];



    UIButton *btn = [UIButton buttonWithType:UIButtonTypeSystem];

    btn.frame = CGRectMake(20, 100, self.view.frame.size.width-40, 50);

    btn.backgroundColor = [UIColor whiteColor];

    [btn setTitle:@"按钮" forState:UIControlStateNormal];

    [btn addTarget:self action:@selector(btnClicked) forControlEvents:UIControlEventTouchUpInside];

    [self.view addSubview:btn];

}



- (void)btnClicked

{

    if (self.view.superview) {

        //移除子视图

        [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

 

//

//  SecondViewController.m

//  UI3_视图切换

//

//  Created by zhangxueming on 15/7/3.

//  Copyright (c) 2015年 zhangxueming. All rights reserved.

//



#import "SecondViewController.h"



@interface SecondViewController ()



@end



@implementation SecondViewController



- (void)viewDidLoad {

    [super viewDidLoad];

    // Do any additional setup after loading the view.

    self.view.backgroundColor = [UIColor blueColor];



    UIButton *btn = [UIButton buttonWithType:UIButtonTypeSystem];

    btn.frame = CGRectMake(20, 100, self.view.frame.size.width-40, 50);

    btn.backgroundColor = [UIColor whiteColor];

    [btn setTitle:@"按钮" forState:UIControlStateNormal];

    [btn addTarget:self action:@selector(btnClicked) forControlEvents:UIControlEventTouchUpInside];

    [self.view addSubview:btn];



}



- (void)btnClicked

{

    if (self.view.superview) {

        //移除子视图

        [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