Define default TTTabItem in a TTTabBar

Hi all Does anyone know how to set the default TTTabItem in an TTTabBar? I was able to load the corresponding page as default, but I am no开发者_Go百科t able to check an item as default in the TTTabBar list.

Sofar, always the first TTTabItem is checked.

Thanks and best regards, Doonot

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NSInteger default = 0;
[self tabBar:_tabBar tabSelected:default];