如何在iOS中从first_view_controller访问second_view_controller的滚动视图

Question

例如，，

-(void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender{

track *transferViewController = [segue destinationViewController];
if([txt1.text isEqualToString:@"scroll"]) {
 transferViewController.trackData = @"Scrolling Part >"; //secondviewcontroller's LABEL
    [transferViewController.scrviw1 setScrollEnabled:YES];
    [transferViewController.scrviw1 setContentSize:(CGSizeMake(280, 800))];
}
else{
   transferViewController.trackData = @"Scroll view Not enabled >"; 
}
}

现在，如果v运行代码，则在满足条件的情况下，在下一个控制器中显示“滚动部分”标签，但是滚动视图不显示。如何访问此滚动条？

Answer 1

您可以执行以下操作-

-(void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
{
  transferViewController = [segue destinationViewController];   //Make global declaration of track.
  if([txt1.text isEqualToString:@"scroll"]) {
  {
    transferViewController.scrollFlag = YES;   //Create a Bool property as scrollFlag
    //OR
    [transferViewController setScrollWithFlag:@"YES"];   //A method to set scroll of scrollView.

     //Also do what u want to do.
  }
  else
  {
   //Do as u did.
  }
}

同样，创建该Bool属性（scrollFlag）或在轨道控制器中实现该setScrollWithFlag方法。 您将能够设置滚动视图的滚动。

请让我知道。

Answer 2

尝试这个：

-(void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender{

track *transferViewController = [segue destinationViewController];
if([txt1.text isEqualToString:@"scroll"]) {
 transferViewController.trackData = @"Scrolling Part >"; //secondviewcontroller's LABEL
 [transferViewController view]; // to make sure view is loaded
 dispatch_async(dispatch_get_main_queue(), ^{
                [transferViewController.scrviw1 setScrollEnabled:YES];
                [transferViewController.scrviw1 setContentSize:(CGSizeMake(280, 800))];
            });

}
else{
   transferViewController.trackData = @"Scroll view Not enabled >"; 
}
}