如題，當前在登陸界面，用戶登陸后幾乎不會再回到該界面，所以想釋放掉該界面的內存并跳轉到主界面。不太理解presentmodelview的過程，但是dissmiss后會回到以前的界面，好像以前的界面并沒有釋放內存。求人解答下該方法具體的過程以及怎么實現我要的效果。navigationviewcontroller好像不太行---代碼---NewJourneyViewController*addJourneyView=[[NewJourneyViewControlleralloc]init];UINavigationController*navAddViewController=[[UINavigationControlleralloc]initWithRootViewController:addJourneyView];[addJourneyViewrelease];[selfpresentViewController:navAddViewControlleranimated:YEScompletion:nil];[navAddViewControllerrelease];這里present了viewB，viewB里面只有個retian的uitextfield，在viewB的viewDIdLoad里面初始化，代碼如下。_nameJourney=[[UITextFieldalloc]initWithFrame:CGRectMake(25,64+25,270,30)];_nameJourney.placeholder=@"旅程標題";_nameJourney.clearButtonMode=UITextFieldViewModeWhileEditing;_nameJourney.borderStyle=UITextBorderStyleRoundedRect;_nameJourney.delegate=self;_nameJourney.returnKeyType=UIReturnKeyDone;[_nameJourneybecomeFirstResponder];[self.viewaddSubview:_nameJourney];