引入代理类头文件和要跳转到的界面头文件
-(void)aaa
{
//可以插入动画
lyxviewcontrollor * view = [lyxviewcontrollor new];
lyxdelegate * dingdong = [uiapplacation sharedapplacation].delegate;
dingdong.window.rootviewcontrollor = view;
}
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