iOS容器视图控制器的使用

 

在iOS的的布局中，很多时候需要自定义状态栏，或者在一个页面上需要把button点击切换不同的视图，这时候该怎么办呢？很明显，这个就需要用到容器视图控制器，这种写法在iOS开发中经常碰到！下面贴上代码，不多！

#import "ViewController.h"
#import "FirstViewController.h"
#import "SecondViewController.h"

@interface ViewController ()
@property (nonatomic,strong)UIButton         *button;
@property (nonatomic,strong)NSArray          *viewControllers;
@property (nonatomic,strong)UIView           *contentView;
@property (nonatomic,strong)UIViewController *currentController;

@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    self.view.backgroundColor = [UIColor whiteColor];
    NSArray *arrayTitle = @[@"button1",@"button2"];
    //循环创建两个button
    for (int i = 0; i<2; i++) {
        _button= [UIButton buttonWithType:UIButtonTypeCustom];
        _button.frame = CGRectMake(60 + i *100, 100, 100, 40);
        _button.layer.borderWidth = 1.0;
        _button.layer.borderColor = [UIColor grayColor].CGColor;
        _button.backgroundColor = [UIColor clearColor];
        [_button setTitle:arrayTitle[i] forState:UIControlStateNormal];
        [_button setTitleColor:[UIColor blackColor] forState:UIControlStateNormal];
        _button.tag = 100 + i;
        [_button addTarget:self action:@selector(buttonPressed:) forControlEvents:UIControlEventTouchUpInside];
        [self.view addSubview:_button];
    }
    FirstViewController *first = [[FirstViewController alloc]init];
    SecondViewController *second = [[SecondViewController alloc]init];
    _viewControllers = @[first,second];
    
    //初始化容器视图
    _contentView = [[UIView alloc]initWithFrame:CGRectMake(0, 200, CGRectGetMaxX(self.view.bounds), CGRectGetMaxY(self.view.bounds) - 200)];
    [self.view addSubview:_contentView];
    [self setCurrentControllerWithIndex:0];//默认选择第0个controller
}


//切换控制器
- (void)setCurrentControllerWithIndex:(NSInteger)index
{
    //表现形式，可视化的把一个controller的试图内容如到容器controller的视图中
    UIViewController *controller = [_viewControllers objectAtIndex:index];
    if (_currentController == controller) {
        return;
    }
    //把controller关联到容器controller中
    [_contentView addSubview:controller.view];
    [self addChildViewController:controller];
    //通知系统，关联完毕
    [controller didMoveToParentViewController:self];//关联controller
    
    //移除上一个页面
    if (_currentController) {
        //和添加viewController-- 对应
        [_currentController.view removeFromSuperview];
        [_currentController removeFromParentViewController];
        [_currentController willMoveToParentViewController:self];
    }
    _currentController = controller;
}

- (void)buttonPressed:(UIButton *)sender{
    NSUInteger index = sender.tag - 100;
    [self setCurrentControllerWithIndex:index];

}

 

还有一种是视图加载，很简单，如下，顺便贴上简单的右切换动画代码：

WJServiceFunctionDetailViewController *function = [[WJServiceFunctionDetailViewController alloc]init];
    [self.view addSubview:function.view];
    [self addChildViewController:function];
    [self.view bringSubviewToFront:function.view];
    
    [function.view setCenter:CGPointMake(function.view.center.x + CGRectGetMaxX(self.view.bounds), function.view.center.y)];
    [UIView animateWithDuration:0.3 delay:0 options:UIViewAnimationOptionCurveEaseOut animations:^{
        [function.view setCenter:CGPointMake(function.view.center.x - CGRectGetMaxX(self.view.bounds), function.view.center.y)];
    } completion:^(BOOL finished) {
        [self addChildViewController:function];
    }];

返回向左的动画

//返回
- (void)comeBack{
    [UIView animateWithDuration:0.3 delay:0 options:UIViewAnimationOptionCurveEaseOut animations:^{
        [self.view setCenter:CGPointMake(self.view.center.x + CGRectGetMaxX(self.view.bounds), self.view.center.y)];
    } completion:^(BOOL finished) {
        //移除父视图
        [self removeFromParentViewController];
        [self.view removeFromSuperview];
    }];
}