昨天 调试程序 已经快要上线了 突然有个BUG 找了半天 才找到是因为这个警告 但是 解决这个警告又花了一天的时间 试了各种消除控制器的方法 都不可用 其中 并且 有这个bug  手机真机测试完全没问题  只有在iPad上 有这个警告 就会出问题 第一个解决办法  试了下 半成品  上下代码 dispatch_after(dispatch_time(DISPATCH_TIME_NOW,(int64_t)(0.51 * NSEC_PER_SEC)),dispatch_get_main_queue(…

当我想从一个VC跳转到另一个VC的时候,一般会用 - (void)presentViewController:(UIViewController *)viewControllerToPresent animated: (BOOL)flag completion:(void (^)(void))completion;当然也可以用导航push. 有时会遇到了此类警告:Warning: Attempt to present on whose view is not in the window hier…

昨天写豆瓣发广播Demo的时候,为了写Demo的简单,就使用了Storyboard,结果执行视图跳转时遇到了这个问题: Warning: Attempt to present <UINavigationController: 0x8d514e0> on <OAuthViewController: 0xa044a60> whose view is not in the window hierarchy! 其功能是OAuthViewController用于用户授权,在获取用户的授权后将…

系统:mac OS  10.12 (16A323) Xcod:8.3.3 错误:Warning: Attempt to present <UIAlertController: 0x7fd192806e20> on <ViewController: 0x7fd1928048d0> whose view is not in the window hierarchy! 原因:今天写UIalerCortoller 出现此错误,查找得资料这是个经典的 错误,在往后日子里面都会遇到类似问题,这…

Unsupported Configuration: “View Controller” is unreachable because it has no entry points, and no identifier for runtime access via -[UIStoryboard instantiateViewControllerWithIdentifier:]. 直译:不支持的设置:"View Controller"是不能被取到的,因为它没有程序入口指针,也没有标识符以…

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…

冬天已经过去了,阳光越来越暖洋洋的了.还记得上学的时候,老师总说"春天是播种的季节",而我还没在朋友圈许下什么愿望.一年了,不敢想象回首还能看到点什么,所以勇往直前.当被俗世所扰,你是否也丢失了自己,忘却了理想. 欲做精金美玉的人品,定从烈火中煅来:思立掀天揭地的事功,须向薄冰上履过. 这篇博客中,我们主要来叙述一下上述动画效果的实现方案.主要涉及 View Controller 转场动画的知识.我搭建了个人站点,那里有更多内容,请多多指教.点我哦!!! Presenting a Vi…

Resource Management in View Controllers View controllers are an essential part of managing your app’s resources. View controllers allow you to break your app up into multiple parts and instantiate only the parts that are needed. But more than that, a…

Creating Custom Content View Controllers 创建自定义内容视图控制器 Custom content view controllers are the heart of your app. You use them to present your app’s unique content. All apps need at least one custom content view controller. Complex apps divide the wor…

View Controller Basics 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 must there…