這一篇記錄的是iOS開發中第三方庫WMPageController控件的使用方法，主要是用來分頁顯示內容的，可以通過手勢滑動來切換頁面，也可以通過點擊標題部分來切換頁面，如下圖所示：

使用方法:

新建工程DemoTest1，然後通過cocoapods引入WMPageController到項目中，Podfile文件的內容如下：

platform :ios,'7.0'

target 'DemoTest1' do

 pod 'WMPageController', '~> 1.6.4'

end

方法一：

（1）創建幾個ViewController繼承自UIViewController測試用：

（2）打開AppDelegate.m文件，在其中加入下面一個方法：

#import "WMPageController.h"

#import "OneViewController.h"
#import "ViewController.h"
#import "TwoViewController.h"

@interface AppDelegate ()

@property(nonatomic,strong) WMPageController *createPages;

@end

@implementation AppDelegate

- (WMPageController *)createPages {


  //WMPageController中包含的頁面數組
  NSArray *controllers = [NSArray arrayWithObjects:[ViewController class], [OneViewController class],[TwoViewController class], nil];
  //WMPageController控件的標題數組
  NSArray *titles = [NSArray arrayWithObjects:@"體育新聞", @"娛樂新聞",@"直播新聞", nil];
  //用上面兩個數組初始化WMPageController對象
  WMPageController *pageController = [[WMPageController alloc] initWithViewControllerClasses:controllers andTheirTitles:titles];
  pageController.menuViewStyle = WMMenuViewStyleLine;
  pageController.titleColorSelected = [UIColor whiteColor];
  pageController.titleColorNormal = [UIColor colorWithRed:168.0/255.0 green:20.0/255.0 blue:4/255.0 alpha:1];
  pageController.progressColor = [UIColor colorWithRed:168.0/255.0 green:20.0/255.0 blue:4/255.0 alpha:1];
  //  pageController.itemsWidths = @[@(70),@(100),@(70)]; // 這裡可以設置不同的寬度

  //設置WMPageController每個標題的寬度
  pageController.menuItemWidth = 375/3;
  //設置WMPageController標題欄的高度
  pageController.menuHeight = 35;
  //設置WMPageController選中的標題的顏色
  pageController.titleColorSelected = [UIColor colorWithRed:200 green:0 blue:0 alpha:1];
  return pageController;
}


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


 self.window = [[UIWindow alloc] initWithFrame:[UIScreen mainScreen].bounds];


  WMPageController *page = [self createPages];

  UINavigationController *na = [[UINavigationController alloc] initWithRootViewController:page];

  self.window.rootViewController = na;

  [self.window makeKeyAndVisible];

  return YES;
}

方法二：

（1）創建個ViewController繼承自WMPageController

（2）編輯ViewController.m文件，代碼如下：

初始化設置：

#import "TwoViewController.h"
#import "OneViewController.h"
#import "TableViewController.h"

#import "ThreeViewController.h"

@interface ThreeViewController () 

@property (nonatomic, strong) NSArray *titleData;
@end

@implementation ThreeViewController

#pragma mark 標題數組
- (NSArray *)titleData {
  if (!_titleData) {
    _titleData = @[@"單曲", @"詳情", @"歌詞",@"歌詞"];
  }
  return _titleData;
}
#pragma mark 初始化代碼
- (instancetype)init {
  if (self = [super init]) {


    self.titleSizeNormal = 15;
    self.titleSizeSelected = 15;
    self.menuViewStyle = WMMenuViewStyleLine;
    self.menuItemWidth = [UIScreen mainScreen].bounds.size.width / self.titleData.count;
    self.menuHeight = 50;
  }
  return self;
}

WMPageController --Datasource & Delegate

#pragma mark - Datasource & Delegate

#pragma mark 返回子頁面的個數
- (NSInteger)numbersOfChildControllersInPageController:(WMPageController *)pageController {
  return self.titleData.count;
}

#pragma mark 返回某個index對應的頁面
- (UIViewController *)pageController:(WMPageController *)pageController viewControllerAtIndex:(NSInteger)index {


  switch (index) {
      case 0:{

        TwoViewController  *vcClass = [[TwoViewController alloc] init];
        vcClass.title = @"1";

        return vcClass;
      }

        break;
      case 1:{

        OneViewController *vcClass = [OneViewController new];
        vcClass.title = @"2";
        return vcClass;

      }
        break;
      case 2:{

        TableViewController *vcClass = [TableViewController new];
        vcClass.title = @"3";
        return vcClass;

      }
        break;

      default:{

        OneViewController *vcClass = [OneViewController new];
        vcClass.title = @"4";
        return vcClass;

      }

        break;
    }


}

#pragma mark 返回index對應的標題
- (NSString *)pageController:(WMPageController *)pageController titleAtIndex:(NSInteger)index {

  return self.titleData[index];
}

相關設置：

/**
 * Values and keys can set properties when initialize child controlelr (it's KVC)
 * values keys 屬性可以用於初始化控制器的時候為控制器傳值(利用 KVC 來設置)
  使用時請確保 key 與控制器的屬性名字一致！！(例如：控制器有需要設置的屬性 type，那麼 keys 所放的就是字符串 @"type")
 */
@property (nonatomic, strong) NSMutableArray<id> *values;
@property (nonatomic, strong) NSMutableArray<NSString *> *keys;

/**
 * 各個控制器的 class, 例如:[UITableViewController class]
 * Each controller's class, example:[UITableViewController class]
 */
@property (nonatomic, copy) NSArray<Class> *viewControllerClasses;

/**
 * 各個控制器標題
 * Titles of view controllers in page controller.
 */
@property (nonatomic, copy) NSArray<NSString *> *titles;
@property (nonatomic, strong, readonly) UIViewController *currentViewController;

/**
 * 設置選中幾號 item
 * To select item at index
 */
@property (nonatomic, assign) int selectIndex;

/**
 * 點擊相鄰的 MenuItem 是否觸發翻頁動畫 (當當前選中與點擊Item相差大於1是不觸發)
 * Whether to animate when press the MenuItem, if distant between the selected and the pressed is larger than 1,never animate.
 */
@property (nonatomic, assign) BOOL pageAnimatable;

/**
 * 選中時的標題尺寸
 * The title size when selected (animatable)
 */
@property (nonatomic, assign) CGFloat titleSizeSelected;

/**
 * 非選中時的標題尺寸
 * The normal title size (animatable)
 */
@property (nonatomic, assign) CGFloat titleSizeNormal;

/**
 * 標題選中時的顏色, 顏色是可動畫的.
 * The title color when selected, the color is animatable.
 */
@property (nonatomic, strong) UIColor *titleColorSelected;

/**
 * 標題非選擇時的顏色, 顏色是可動畫的.
 * The title's normal color, the color is animatable.
 */
@property (nonatomic, strong) UIColor *titleColorNormal;

/**
 * 標題的字體名字
 * The name of title's font
 */
@property (nonatomic, copy) NSString *titleFontName;

/**
 * 導航欄高度
 * The menu view's height
 */
@property (nonatomic, assign) CGFloat menuHeight;

// 當所有item的寬度加起來小於屏幕寬時，PageController會自動幫助排版，添加每個item之間的間隙以填充整個寬度
// When the sum of all the item's width is smaller than the screen's width, pageController will add gap to each item automatically, in order to fill the width.

/**
 * 每個 MenuItem 的寬度
 * The item width,when all are same,use this property
 */
@property (nonatomic, assign) CGFloat menuItemWidth;

/**
 * 各個 MenuItem 的寬度，可不等，數組內為 NSNumber.
 * Each item's width, when they are not all the same, use this property, Put `NSNumber` in this array.
 */
@property (nonatomic, copy) NSArray<NSNumber *> *itemsWidths;

/**
 * 導航欄背景色
 * The background color of menu view
 */
@property (nonatomic, strong) UIColor *menuBGColor;

/**
 * Menu view 的樣式，默認為無下劃線
 * Menu view's style, now has two different styles, 'Line','default'
 */
@property (nonatomic, assign) WMMenuViewStyle menuViewStyle;

@property (nonatomic, assign) WMMenuViewLayoutMode menuViewLayoutMode;

/**
 * 進度條的顏色，默認和選中顏色一致(如果 style 為 Default，則該屬性無用)
 * The progress's color,the default color is same with `titleColorSelected`.If you want to have a different color, set this property.
 */
@property (nonatomic, strong) UIColor *progressColor;

/**
 * 定制進度條在各個 item 下的寬度
 */
@property (nonatomic, strong) NSArray *progressViewWidths;

/// 定制進度條，若每個進度條長度相同，可設置該屬性
@property (nonatomic, assign) CGFloat progressWidth;

/// 調皮效果，用於實現騰訊視頻新效果，請設置一個較小的 progressWidth
@property (nonatomic, assign) BOOL progressViewIsNaughty;

/**
 * 是否發送在創建控制器或者視圖完全展現在用戶眼前時通知觀察者，默認為不開啟，如需利用通知請開啟
 * Whether notify observer when finish init or fully displayed to user, the default is NO.
 * See `WMPageConst.h` for more information.
 */
@property (nonatomic, assign) BOOL postNotification;

/**
 * 是否記錄 Controller 的位置，並在下次回來的時候回到相應位置，默認為 NO (若當前緩存中存在不會觸發)
 * Whether to remember controller's positon if it's a kind of scrollView controller,like UITableViewController,The default value is NO.
 * 比如 `UITabelViewController`, 當然你也可以在自己的控制器中自行設置, 如果將 Controller.view 替換為 scrollView 或者在Controller.view 上添加了一個和自身 bounds 一樣的 scrollView 也是OK的
 */
@property (nonatomic, assign) BOOL rememberLocation __deprecated_msg("Because of the cache policy,this property can abondon now.");

/** 緩存的機制，默認為無限制 (如果收到內存警告, 會自動切換) */
@property (nonatomic, assign) WMPageControllerCachePolicy cachePolicy;

/** 預加載機制，在停止滑動的時候預加載 n 頁 */
@property (nonatomic, assign) WMPageControllerPreloadPolicy preloadPolicy;

/** Whether ContentView bounces */
@property (nonatomic, assign) BOOL bounces;

/**
 * 是否作為 NavigationBar 的 titleView 展示，默認 NO
 * Whether to show on navigation bar, the default value is `NO`
 */
@property (assign, nonatomic) BOOL showOnNavigationBar;

/**
 * 用代碼設置 contentView 的 contentOffset 之前，請設置 startDragging = YES
 * Set startDragging = YES before set contentView.contentOffset = xxx;
 */
@property (nonatomic, assign) BOOL startDragging;

/** 下劃線進度條的高度 */
@property (nonatomic, assign) CGFloat progressHeight;

/** WMPageController View' frame */
@property (nonatomic, assign) CGRect viewFrame;

/**
 * Menu view items' margin / make sure it's count is equal to (controllers' count + 1),default is 0
  頂部菜單欄各個 item 的間隙，因為包括頭尾兩端，所以確保它的數量等於控制器數量 + 1, 默認間隙為 0
 */
@property (nonatomic, copy) NSArray<NSNumber *> *itemsMargins;

/**
 * set itemMargin if all margins are the same, default is 0
  如果各個間隙都想同，設置該屬性，默認為 0
 */
@property (nonatomic, assign) CGFloat itemMargin;

/** 頂部 menuView 和 scrollView 之間的間隙 */
@property (nonatomic, assign) CGFloat menuViewBottomSpace;

/** progressView 到 menuView 底部的距離 */
@property (nonatomic, assign) CGFloat progressViewBottomSpace;

/** progressView's cornerRadius */
@property (nonatomic, assign) CGFloat progressViewCornerRadius;
/** 頂部導航欄 */
@property (nonatomic, weak) WMMenuView *menuView;

/** 內部容器 */
@property (nonatomic, weak) WMScrollView *scrollView;

/** MenuView 內部視圖與左右的間距 */
@property (nonatomic, assign) CGFloat menuViewContentMargin;

/**
 * 左滑時同時啟用其他手勢，比如系統左滑、sidemenu左滑。默認 NO
  (會引起一個小問題，第一個和最後一個控制器會變得可以斜滑, 還未解決)
 */
@property (assign, nonatomic) BOOL otherGestureRecognizerSimultaneously;
/**
 * 構造方法，請使用該方法創建控制器. 或者實現數據源方法. /
 * Init method，recommend to use this instead of `-init`. Or you can implement datasource by yourself.
 *
 * @param classes 子控制器的 class，確保數量與 titles 的數量相等
 * @param titles 各個子控制器的標題，用 NSString 描述
 *
 * @return instancetype
 */
- (instancetype)initWithViewControllerClasses:(NSArray<Class> *)classes andTheirTitles:(NSArray<NSString *> *)titles;

/**
 * A method in order to reload MenuView and child view controllers. If you had set `itemsMargins` or `itemsWidths` `values` and `keys` before, make sure you have update them also before you call this method. And most important, PAY ATTENTION TO THE COUNT OF THOSE ARRAY.
  該方法用於重置刷新父控制器，該刷新包括頂部 MenuView 和 childViewControllers.如果之前設置過 `itemsMargins` 和 `itemsWidths` `values` 以及 `keys` 屬性，請確保在調用 reload 之前也同時更新了這些屬性。並且，最最最重要的，注意數組的個數以防止溢出。
 */
- (void)reloadData;

/**
 * Update designated item's title
  更新指定序號的控制器的標題
 *
 * @param title 新的標題
 * @param index 目標序號
 */
- (void)updateTitle:(NSString *)title atIndex:(NSInteger)index;

/**
 * Update designated item's title and width
  更新指定序號的控制器的標題以及他的寬度
 *
 * @param title 新的標題
 * @param index 目標序號
 * @param width 對應item的新寬度
 */
- (void)updateTitle:(NSString *)title andWidth:(CGFloat)width atIndex:(NSInteger)index;

/** 當 app 即將進入後台接收到的通知 */
- (void)willResignActive:(NSNotification *)notification;
/** 當 app 即將回到前台接收到的通知 */
- (void)willEnterForeground:(NSNotification *)notification;

源碼demo：源碼下載

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