Uinavigationcontroller
The UINavigationController class implements a specialized iOS view controller that manages the navigation of hierarchical content.
Uitabbarcontroller
The UITabBarController class implements a specialized view controller that manages a radio-style selection interface
Others
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Uiviewcontroller or uinavigationcontroller which implement their user interface in their own viewdidload;you should create your view controllers in viewdidload of the uitabbarcontroller not in the viewdidappear from question MonoTouch: how to select initial view from TabBarController's multiple views |
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Embedding a uitabbarcontroller inside a uinavigationcontroller is not supported;apple has a careful hierarchy of container view controllers and a uitabbarcontroller must be the root of its view controller hierarchy from question Why is self.navigationController NULL when pushed from UITabBarController subviews |
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I am writing an app based on uitabbarcontroller which has more than 10 viewcontrollers with corresponding uinavigationcontroller from question Customizing the "More" list of UITabBarController tabs |
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As you have correctly done the uitabbarcontroller should not push a uiviewcontroller but a uinavigationcontroller;that uinavigationcontroller should have a rootviewcontroller from question Obj c, xcode making a view transition |