点击按钮实现切换控制器的实现

 

效果实现如下所示:

 

 

实现代码如下:

 

#import "ViewController.h"

#import "ViewController1.h"

#import "ViewController2.h"

#import "ViewController3.h"

#define kScreenWidth [UIScreen mainScreen].bounds.size.width

#define kScreenHeight [UIScreen mainScreen].bounds.size.height

 

@interface ViewController ()

 

@property (nonatomic,strong) UIViewController *currentVc;

 

@end

 

@implementation ViewController

 

- (void)viewDidLoad {

    [super viewDidLoad];

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

    self.view.backgroundColor = [UIColor yellowColor];

    

    [self creatUI];

    [self addChildVC];

    

}

- (void)addChildVC{

    [self addChildViewController:[[ViewController1 alloc]init]];

    [self addChildViewController:[[ViewController2 alloc]init]];

    [self addChildViewController:[[ViewController3 alloc]init]];

 }

 

- (void)creatUI{

  

    CGFloat width = kScreenWidth / 3;

    

    for (NSInteger i =0 ; i < 3; i++) {

        

        UIButton * button = [UIButton buttonWithType:UIButtonTypeCustom];

        button.frame = CGRectMake(i * width,0,width,100);

        

        button.backgroundColor = [UIColor purpleColor];

        [button setTitle:[NSString stringWithFormat:@"按钮%ld",i + 1] forState:UIControlStateNormal];

        button.tag = i+ 1;

        

        //生成随机颜色

        button.backgroundColor = [UIColor colorWithRed:arc4random_uniform(255)/255.0 green:arc4random_uniform(255)/255.0 blue:arc4random_uniform(255)/255.0 alpha:1];

        [button addTarget:self action:@selector(pressBtn:) forControlEvents:UIControlEventTouchUpInside];

        [self.view addSubview:button];

        

    }

}

 

 

- (void)pressBtn:(UIButton *)button{

    

    /*移除当前控制器*/

    [self.currentVc.view removeFromSuperview];

    

    //NSInteger index = [button.superview.subviews indexOfObject:button];

    

    //根据tag值设置当前控制器

    self.currentVc = self.childViewControllers[button.tag - 1];

    

    //设置尺寸

    self.currentVc.view.frame = CGRectMake(0, 100, kScreenWidth, kScreenHeight);

    

    //添加到控制器上

    [self.view addSubview:self.currentVc.view];

    

}