解决类似网易新闻客户端收到新闻推送后,弹出一个UIAlert,然后跳转到新闻详情页面这种需求 1.提供一个UIView的分类方法,这个方法通过响应者链条获取view所在的控制器 - (UIViewController *)parentController { UIResponder *responder = [self nextResponder]; while (responder) { if ([responder isKindOfClass:[UIViewController class]…

用一个分类,具体: .h #import <UIKit/UIKit.h> @interface UIView (CurrentController) /** 获取当前View的控制器对象 */ -(UIViewController *)getCurrentViewController; @end .m #import "UIView+CurrentController.h" @implementation UIView (CurrentController) /** 获取当…

UIWindow *window = [[[UIApplication sharedApplication] windows] lastObject];    UIView * keyview=[[window subviews] lastObject];    UIView * view=[[UIView alloc] initWithFrame:keyBoardFrame];    view.backgroundColor=[UIColor redColor];    [keyview ad…

id next = [self nextResponder] ; while (next != nil) { next = [next nextResponder]; if ([next isKindOfClass:[XX_ViewController class]]) { // return; } }…

- (UIViewController*)getViewController{ for (UIView* next = [self superview]; next; next = next.superview) { UIResponder* nextResponder = [next nextResponder]; if ([nextResponder isKindOfClass:[UIViewController class]]) { return (UIViewController*)ne…

*************HMAppDelegate.m中 @implementation HMAppDelegate - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions { self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];…

iOS Programming View Controllers  视图控制器  1.1  A view controller is an instance of a subclass of UIViewController. 一个view controller 是一个UIViewController的子类. A view controller manages a view hierarchy. 一个view controller 管理一个视图树. It is responsible for c…

1.view里实现控制器的modal 拿到主窗口的根控制器,用根控制器进行modal需要的modal的控制器 场景:点击自定义view里的按钮实现控制器的modal UIViewController *root = [UIApplication sharedApplication].keyWindow.rootViewController; [root presentViewController:<#(nonnull UIViewController *)#> animated:YES com…

View Controller Basics   视图控制器基础 Apps running on iOS–based devices have a limited amount of screen space for displaying content and therefore must be creative in how they present information to the user. Apps that have lots of information to display…

(1)导航控制器初始化的时候一般都有一个根视图控制器,导航控制器相当于一个栈,里面装的是视图控制器,最先进去的在最以下,最后进去的在最上面.在最上面的那个视图控制器的视图就是这个导航控制器对外展示的界面,也就是用户看到的界面. (2)我们须要把导航控制器载入到APP中,须要把这个导航控制器设置为window的根视图控制器(都是控制器类,能够赋值),这样就相当于载入到了window里. (3)我们要在栈中新增或者删除一个视图控制器,就须要得到导航控制器,一般在栈中得全部视图控制器都有一个self.…