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…
View Controller的组合应用其实很常见了,比如说Tab bar controller和Navigation view controller的组合使用,像这种一般都是Navigation view controller作为Tab bar controller的一个child view controller,对应了一个Tab bar item. 然后今天在Review 另外一组的一个产品的代码时,发现他们将Tab bar controller作为了一个普通view controller的…
Using View Controllers in Your App Whether you are working with view controllers provided by iOS, or with custom controllers you’ve created to show your app’s content, you use a similar set of techniques to actually work with the view controllers. 不管…
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…
Parent-child relationshipsParent-child relationships are formed when using view controller containers. Examples of viewcontroller containers are UINavigationController, UITabBarController, and UISplitViewController. You can identify a view controller…
On the iPhone or iPod touch, a modal view controller takes over the entire screen. This is the defaultbehavior and the only possibility on these devices. On the iPad, you have two additional options: aform sheet style and a page sheet style. You can…
Attempting to load the view of a view controller while it is deallocating is not allowed and may result in undefined behavior (<UISearchController: 0x7f9c28c9d740>) 出现此类错误的时候很是头疼,因为这是 iOS9.0之类才会出现的错误,具体表现就是当 UISearchBar 出现的时候控制台就会输入此类的信息: 其实也很好解决,可以…
转载地址:http://blog.sina.com.cn/s/blog_6784e6ea01017jfy.html 最新更正:这个提示几乎不影响编译和运行,可以不用设置. 产生这个提示的操作:在xcode4.6中创建一个名字为appTest空工程,create一个ios-application-empty application,直接编译运行 错误提示:虽然编译通过,也能运行,但是底下有错误提示“application windows are expected to have a r…
最近在看Extension相关知识的时候,自己写了个小demo 发现[UIApplication sharedApplication]这个方法敲不出来了, 总是报错:'sharedApplication' is unavailable: not available on iOS (App Extension) - Use view controller based..... 在网上找了一些觉得办法,大多都是在说把cocoapods卸载了重装的 但很明显 我的问题不是由于这个原因导致的 然后我问…
今天在点击按钮push viewController 时,控制台报错: Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: 'Pushing the same view controller instance more than once is not supported 网上查了以下原因, 是说过快点击可能会产生多次push的情况,在MVC里是不支持这种事件的,所以,保险起见,在可能出现…
产生这个提示的操作:在xcode4.6中创建一个名字为appTest空工程,create一个ios-application-empty application,直接编译运行 错误提示:虽然编译通过,也能运行,但是底下有错误提示“application windows are expected to have a root view controller” 原因:在较新的xcod上都会出现这种错误.在iOS5之前的版本,应用加载时,需要一个root view controller,在iOS5以下的…