UIScrollView won't scroll when re-entering view - iphone

Question

I have a UIView (inside a View Controller, of course), and inside this UIView, I have a UIScrollView. UIScrollView contains some images and buttons. One of the buttons uses the modal Action Segue and opens up a UIView with a MapView inside, and a "back" button at the bottom that takes you back to the previous UIView. But upon going "back" (from the MapView to the UIView), the UIScrollView does not scroll anymore like it did before going to the MapView and back. It's like it's locked in its top position. I feel like it has something to do with delegates? I dunno though, I'm not too clear on those yet. Anyway, any insight to my scrolling issue?? Thanks!!
Here's my .h file (where my scroll view is):
#import <UIKit/UIKit.h>
#import <QuartzCore/QuartzCore.h>
#interface ThirdViewController : UIViewController <UIScrollViewDelegate, UIScrollViewAccessibilityDelegate>
#property (strong, nonatomic) IBOutlet UIView *findUsView;
#property (weak, nonatomic) IBOutlet UIScrollView *findUsScrollView;
- (IBAction)callButton:(id)sender;
- (IBAction)getDirButton:(id)sender;
#end
Here's my .m file (where my scroll view is):
#import "ThirdViewController.h"
#implementation ThirdViewController
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil {
self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
if (self) {
// Custom initialization
}
return self;
}
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view.
self.view.backgroundColor = [UIColor colorWithPatternImage:[UIImage imageNamed:#"appBackgroundColor.png"]];
[self.view addSubview:self.findUsScrollView];
}
-(void)viewWillAppear:(BOOL)animated{
//this line creates the frame of the scrollview (dimensions)
[self.findUsScrollView setFrame:CGRectMake(0, 0, 0, 750)];
[super viewWillAppear:animated];
}
-(void)viewDidAppear:(BOOL)animated
{
//dimensions of content within scrollveiw. Scrolling enabaled.
[self.findUsScrollView setScrollEnabled:YES];
[self.findUsScrollView setContentSize:CGSizeMake(0, 751)];
[super viewWillAppear:animated];
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
- (IBAction)callButton:(id)sender {
[[UIApplication sharedApplication] openURL:[NSURL URLWithString:#"tel:[phone]"]];
}
- (IBAction)getDirButton:(id)sender {
}
#end
Here's the .h file for the Map View:
#import <UIKit/UIKit.h>
#import <MapKit/MapKit.h>
#interface MyMapViewController : UIViewController <MKMapViewDelegate, MKAnnotation>
#property (weak, nonatomic) IBOutlet MKMapView *mapView;
#property (weak, nonatomic) IBOutlet UINavigationBar *titleBarMap;
#property (weak, nonatomic) IBOutlet UIToolbar *bottomNavBarMap;
#property (weak, nonatomic) IBOutlet UIView *topTitlesOverlay;
- (IBAction)backButtonMap:(id)sender;
#end
Here's the .m file for the Map View:
#import "MyMapViewController.h"
#implementation BountMapViewController
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
if (self) {
// Custom initialization
}
return self;
}
- (IBAction)backButtonMap:(id)sender {
[self dismissViewControllerAnimated:YES completion: ^(void){
ThirdViewController *vc = (ThirdViewController *)[self presentingViewController];
[[vc findUsScrollView] becomeFirstResponder];
}];
}
#end

Answer 1

Try moving [self.findUsScrollView setFrame:CGRectMake(0, 172, 320, 680)]; and [self.findUsScrollView setContentSize:CGSizeMake(320, 680)]; to viewDidLoad as a first suggestion. You don't want those to be called everytime your view appears.
Second, your contentSize and frameSize are the same (320, 680). This means your UIScrollView does not need to scroll. Remember: for a UIScrollView to scroll it's content size must be bigger than it's frame size. That should be all, and of course: setScrollEnabled: YES;

Answer 2

Your override of viewDidAppear is calling [super viewWillAppear:] instead of [super viewDidAppear:]