iOS 跳转到控制器的方法

//vcArr为控制器的数组

    NSMutableArray * vcArr = [[NSMutableArrayalloc]initWithObjects:@"AllOrderViewController",@"WaitPaymentViewController",@"WaitShippingViewController",@"WaitReceivingViewController",@"InvalidViewController",nil];

//跳转到第4个控制器

NSString * className =vcArr[3];

    Class class = NSClassFromString(className);

    if (class) {

        UIViewController *vc = [classnew];

        vc.view.frame =CGRectMake(0,0, MWidth,MHeight);

        

        [self.viewaddSubview:vc.view];

    }else{

        NSLog(@"没有找到该类");

    }