UISplitViewController做大屏幕分屏显示

为iPad或者iPhone大屏幕进行适配分屏显示，苹果提供了UISplitViewController这个容器。

关键参数介绍

• preferredDisplayMode

UISplitViewControllerDisplayModeAutomatic, 自动,默认样式
UISplitViewControllerDisplayModePrimaryHidden, 主视图隐藏 横竖屏主视图都会隐藏,可以通过手势来控制主视图的显隐
UISplitViewControllerDisplayModeAllVisible, 始终显示 横竖屏主视图都会显示,不可以通过手势来控制主视图的显隐
UISplitViewControllerDisplayModePrimaryOverlay, 主视图悬停 横竖屏主视图都会显示,可以通过手势来控制主视图的显隐

• preferredPrimaryColumnWidthFraction
  主视图的宽度比例:主视图的宽度比例 = 主视图宽度 / SplitViewController整体宽度
• maximumPrimaryColumnWidth
  主视图的宽度最大值
• minimumPrimaryColumnWidth
  主视图的宽度最小值

主视图的宽度比例不好控制，并且受最大值maximumPrimaryColumnWidth和最小值minimumPrimaryColumnWidth两个属性限制

简单实用

在AppDelegate中初始化代码

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {

    self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
    
    UISplitViewController *vc = [[UISplitViewController alloc] init];
    vc.preferredDisplayMode = UISplitViewControllerDisplayModeAllVisible;

    // 主控制
    UINavigationController *master = [[UINavigationController alloc] initWithRootViewController:[[MasterViewController alloc] init]];
    // 内容显示控制器
    UINavigationController *content = [[UINavigationController alloc] initWithRootViewController:[[ContentViewController alloc] init]];
    
    vc.viewControllers = @[master, content];
    
    self.window.rootViewController = vc;
    [self.window makeKeyAndVisible];

    return YES;
}

主控制器中

#import "MasterViewController.h"
#import "ContentViewController.h"

@interface MasterViewController ()<UITableViewDelegate, UITableViewDataSource>
@property (nonatomic, strong) UITableView *tableView;
@end

@implementation MasterViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    self.title = @"主控制器";
    [self.view addSubview:self.tableView];
}

- (void)viewDidLayoutSubviews {
    [super viewDidLayoutSubviews];
    self.tableView.frame = self.view.bounds;
}

#pragma mark - UITableView DataSource Methods
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {
    return 1;
}

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
    return 100;
}

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:@"UITableViewCell" forIndexPath:indexPath];
    cell.textLabel.text = [NSString stringWithFormat:@"%ld", indexPath.row + 1];
    return cell;
}

#pragma mark - UITableView Delegate Methods
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
    [tableView deselectRowAtIndexPath:indexPath animated:YES];
    
    // 小屏幕不支持分屏
    BOOL isLandscape = (UIApplication.sharedApplication.statusBarOrientation == UIInterfaceOrientationLandscapeLeft || UIApplication.sharedApplication.statusBarOrientation == UIInterfaceOrientationLandscapeRight);
    if (isLandscape && UIScreen.mainScreen.bounds.size.height > 375) {
        // 点击直接修改显示内容
        UINavigationController *nav = self.splitViewController.viewControllers.lastObject;
        if (nav.viewControllers.count > 0) {
            [nav.viewControllers.lastObject.navigationController popToRootViewControllerAnimated:YES];
        }
        ContentViewController *vc = nav.viewControllers.firstObject;
        vc.contentText = [NSString stringWithFormat:@"%ld", indexPath.row + 1];
    } else {
        // 点击进行push跳转
        ContentViewController *vc = [[ContentViewController alloc] init];
        vc.contentText = [NSString stringWithFormat:@"%ld", indexPath.row + 1];
        [self.navigationController pushViewController:vc animated:YES];
    }
}

- (UITableView *)tableView {
    if (!_tableView) {
        _tableView = [[UITableView alloc] initWithFrame:CGRectZero style:UITableViewStylePlain];
        _tableView.backgroundColor = [UIColor whiteColor];
        _tableView.tableFooterView = [[UIView alloc] init];
        _tableView.delegate = self;
        _tableView.dataSource = self;
        [_tableView registerClass:[UITableViewCell class] forCellReuseIdentifier:@"UITableViewCell"];
    }
    return _tableView;
}
@end

内容控制器中

#import <UIKit/UIKit.h>

NS_ASSUME_NONNULL_BEGIN

@interface ContentViewController : UIViewController
@property (nonatomic, copy) NSString *contentText;
@end

NS_ASSUME_NONNULL_END

#import "ContentViewController.h"
#import "OtherViewController.h"

@interface ContentViewController ()<UINavigationControllerDelegate>
@property (nonatomic, strong) UILabel *textLabel;
@end

@implementation ContentViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    
    self.navigationController.delegate = self;
    
    self.textLabel = [[UILabel alloc] init];
    self.textLabel.textColor = [UIColor whiteColor];
    self.textLabel.textAlignment = NSTextAlignmentCenter;
    self.textLabel.font = [UIFont systemFontOfSize:100 weight:UIFontWeightMedium];
    [self.view addSubview:self.textLabel];
    self.textLabel.text = self.contentText.length > 0 ? self.contentText : @"1";

    self.view.backgroundColor = [UIColor orangeColor];
}

#pragma mark - UINavigationControllerDelegate
- (void)navigationController:(UINavigationController *)navigationController
      willShowViewController:(UIViewController *)viewController
                    animated:(BOOL)animated {
    
    BOOL isLandscape = (UIApplication.sharedApplication.statusBarOrientation == UIInterfaceOrientationLandscapeLeft ||
                        UIApplication.sharedApplication.statusBarOrientation == UIInterfaceOrientationLandscapeRight);
    // 为了Demo显示好看，分屏时隐藏了内容控制器的导航栏
    if (isLandscape && UIScreen.mainScreen.bounds.size.height > 375) {
        BOOL isShowHomePage = [viewController isKindOfClass:[self class]];
        [self.navigationController setNavigationBarHidden:isShowHomePage animated:YES];
    } else {
        [self.navigationController setNavigationBarHidden:NO animated:YES];
    }
}

- (void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event {
    OtherViewController *vc = [[OtherViewController alloc] init];
    [self.navigationController pushViewController:vc animated:YES];
}

- (void)setContentText:(NSString *)contentText {
    _contentText = contentText;
    self.textLabel.text = contentText;
}

- (void)viewDidLayoutSubviews {
    [super viewDidLayoutSubviews];
    self.textLabel.frame = self.view.bounds;
}
@end

示例图

示例Demo下载

Demo