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…
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…
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…
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…
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…
在 iOS9 中现在找不到 XXX.dylib 了,比如libz.tbd 如果要用到 libz.dylib,可以用下面的办法,来自 Stack Overflow. Go to Build Phases >Link Binary with Librairies > + > Add other Once in the file selection window do “CMD”+Shift+G (Go to folder) and type /usr/lib/ From /usr/lib…