UIViewControllerPageTool

Easy to get top viewcontroller ,previous viewcontroller and page level.(方便获取最上层页面，前一个页面以及页面层级)

Usage

@interface UIViewController (PageViewLevel)

@property(nonatomic,readonly)NSInteger pvl_pageViewLevel;

@end


@interface UIViewController (PreviousController)

/**
 不支持UITabbarController切换记录前一个
 扩展实现可通过 objc_setAssociatedObject(self, @selector(pc_previousController), sourcePageController, OBJC_ASSOCIATION_RETAIN_NONATOMIC) 设置
 优先使用以设置的值
 
 */
@property(nonatomic,readonly)UIViewController *pc_previousController;

@end


@interface UIViewController (TopViewController)

+ (UIViewController *)topViewController;

@end

Installation

via CocoaPods

Install CocoaPods if you do not have it:-

$ [sudo] gem install cocoapods
$ pod setup

Create Podfile:-

$ edit Podfile
platform :ios, '6.0'
pod 'UIViewControllerPageTool',  '~> 1.0.0'
$ pod install

Use the Xcode workspace instead of the project from now on.