Resizing UITableView When Displaying AdWhirl Ads Across Multiple Views - iphone

I am trying to integrate AdWhirl into my iPhone app using an AppDelegate singleton so I can use the same AdWhirl instance across multiple views, but cannot figure out how to resize the tables in those views. The code I am using is:
in ...AppDelegate.h:
#import "AdWhirlView.h"
#import "AdWhirlDelegateProtocol.h"
#interface ...AppDelegate : NSObject <UIApplicationDelegate, AdWhirlDelegate>
AdWhirlView *awView;
...
#property (nonatomic, retain) AdWhirlView *awView;
in ...AppDelegate.m didFinishLaunchingWithOptions:
awView = [AdWhirlView requestAdWhirlViewWithDelegate:self];
also in ...AppDelegate.m I add the required delegate methods
(NSString *)adWhirlApplicationKey...
(UIViewController *)viewControllerForPresentingModalView...
This code allows me to display the same Ad across multiple views but I cannot figure out how to resize a UITableView to change its height to be shorter if an Ad is displaying, so that the UITableView either displays full height if there is no Ad, or is resized if there is an Ad at the bottom of the screen. I have the UITableView as a subview of a UIViewController called myMainView.
I tried changing the autosize properties in the Nib file for the UITableView to have a variable spacer at the bottom, and am adding the AdWhirl instance into the view with this code:
...AppDelegate * myDelegate = (...AppDelegate *)[[UIApplication sharedApplication] delegate];
[myDelegate.awView setFrame:CGRectMake(0, 480-20-44-50, 320, 50)];
[self.myMainView addSubview: myDelegate.awView];
This displays the Ad at the correct location at the bottom of the screen but the UITableView is not resizing. How should I be doing this?

I think you have to create a UIView with an embedded UITableView. I've tried to do something similar and this was the only way I could get it to work. A top-level UITableView is auto-resized to take up the entire screen.
Just expanding on that, you probably want to declare something in your header like so:
#interface ExampleClass:UIViewController {
UITableView *tableView;
}
#property (nonatomic,retain) IBOutlet UITableView *tableView;
Then in your actual implementation, you can resize that declared tablview whenever you need to by doing:
CGRect tableFrame = tableView.frame;
//Decrease the height of table by height of ad banner
tableFrame.size.height = tableView.frame.size.height - adBannerView.frame.size.height;
tableView.frame = tableFrame;

Related

iOS7 UIStatusBar blur not correct

I am using a UIToolbar for the controls at the top of the screen (There is no navigation controller) The toolbar has the look I want, however the status bar is entirely clear. I cannot seem to mimic the blur that the UIToolbar has in it's transparency. Has anyone come across a solution to this that does not involve using a navigation controller?
In Order to achieve this you need to implement methods in the UIBarPositioningDelegate protocol:
https://developer.apple.com/library/ios/documentation/uikit/reference/UIBarPositioningDelegate_Protocol/Reference/Reference.html#//apple_ref/occ/intf/UIBarPositioningDelegate
Here is the code:
#interface ViewController : UIViewController <UIToolbarDelegate>
#property (nonatomic, weak) IBOutlet UIToolbar * toolbar;
#end
#implementation ViewController
- (void)viewDidLoad
{
[super viewDidLoad];
//we become the delegate
self.toolbar.delegate = self;
}
-(UIBarPosition)positionForBar:(id<UIBarPositioning>)bar{
//this tells our bar to extend its background to the top.
return UIBarPositionTopAttached;
}
#end

iOS iPad App: Delegates not called for ViewController with two UIScrollViews and a UIPageControl (delegate functions for paging NOT CALLED)

For my iPad App, I have a main ViewController which contains two UIScrollviews and a UIPageControl.
The Problem is that the delegates for the paging are not getting called.
Here is the layout:
Selecting a button in the lower thumbScrollView needs to update the image in the mainScrollView (this works) Swiping the thumbScrollView or picking a dot on the pageControl needs to "page" the thumbScrollView to show the next previous set of buttons. The swiping does not work because the delegate functions are just not getting called.
I declare the scrollviews and pagecontrol as follows in my VC
#property (strong, nonatomic) IBOutlet UIScrollView *mainScrollView;
#property (strong, nonatomic) IBOutlet UIScrollView *thumbScrollView;
#property (strong, nonatomic) IBOutlet UIPageControl *pageControl;
The ViewController implements UIScrollViewDelegate
#interface MyViewController : UIViewController<UIScrollViewDelegate>
And I implement the following UIScrollViewDelegate delegate functions in my VC's .m file.
- (void)scrollViewDidScroll:(UIScrollView *)sender;
- (void)scrollViewWillBeginDragging:(UIScrollView *)scrollView;
- (void)scrollViewDidEndDecelerating:(UIScrollView *)scrollView;
The view appears but when I swipe across the buttons I do not see the delegate functions above getting called.
I have not found a solution to this in StackOverflow although I have factored in advise from other related posts for other aspects of this (ex. the logic to distinguish which scrollview has initiated the action etc)
ADDING DETAILED CODE HERE (as requested by #HeWas)
This is the header file for the Main View Controller that controls the two scrollviews and pagecontrol (RELEVANT EXCERPTS - TELL ME IF YOU NEED MORE)
// ImageBrowseViewController.h
// (NOTE - In Interface Builder I have added a tag attribute of 0 to mainScrollView
// and 1 to thumbScrollView, to enable me to distinguish which scrollView the delegate
// needs to respond to)
#define TAG_MAIN_SCROLLVIEW 0
#define TAG_THUMB_SCROLLVIEW 1
#interface ImageBrowseViewController : UIViewController<UIScrollViewDelegate>
{
UIButton* currentlySelectedButton;
UIScrollView *mainScrollView;
UIScrollView *thumbScrollView;
UIPageControl* pageControl;
BOOL pageControlBeingUsed;
}
#property (strong, nonatomic) IBOutlet UIScrollView *mainScrollView;
// … connected as outlet in IB to mainScrollView
#property (strong, nonatomic) IBOutlet UIScrollView * thumbScrollView;
// … connected as outlet in IB to thumbScrollView
#property (strong, nonatomic) IBOutlet UIPageControl *pageControl;
// … connected as outlet in IB to pageControl
…
-(IBAction)changePage; //Touch up Inside IBAction connected to pageControl
…
#end
This is the implementation file for the Main View Controller that controls the two scrollviews and pagecontrol (RELEVANT EXCERPTS - TELL ME IF YOU NEED MORE)
//
// ImageBrowseViewController.m
//
…
#synthesize mainScrollView;
#synthesize thumbScrollView;
#synthesize pageControl;
// UIScrollViewDelegate
- (void)scrollViewDidScroll:(UIScrollView *)sender {
if ( [sender tag] == TAG_THUMB_SCROLLVIEW ) {
// This is the thumbScrollview
// Update the page when more than 50% of the previous/next page is visible
CGFloat pageWidth = self.thumbScrollView.frame.size.width;
int page =
floor((self.thumbScrollView.contentOffset.x - pageWidth / 2) / pageWidth)
+ 1;
self.pageControl.currentPage = page;
}
}
- (void)scrollViewWillBeginDragging:(UIScrollView *)scrollView {
pageControlBeingUsed = NO;
}
- (void)scrollViewDidEndDecelerating:(UIScrollView *)scrollView {
pageControlBeingUsed = NO;
}
- (IBAction)changePage {
// Update the scroll view to the appropriate page
CGRect frame;
//frame.origin.x = self.scrollView.frame.size.width * self.pageControl.currentPage;
frame.origin.x = self.thumbScrollView.frame.size.width * self.pageControl.currentPage;
frame.origin.y = 0;
frame.size = self.thumbScrollView.frame.size;
[self.thumbScrollView scrollRectToVisible:frame animated:YES];
// Keep track of when scrolls happen in response to the page control
// value changing. If we don't do this, a noticeable "flashing" occurs
// as the the scroll delegate will temporarily switch back the page
// number.
pageControlBeingUsed = YES;
}
You code all looks 100% (aside from this typo: #synthesize floorplanThumbScrollView;, but that isn't your problem).
I am sure that the answer is that you have not correctly wired your scrollview DELEGATES in IB.
This is the clue:
"Yes I have set all three in Interface Builder. So mainScrollView, thumbScrollView, and pageControl are wired in IB to the above declarations in the VC's .h file."
You need 2 connections between your ViewController and your scrollViews.
(1) ctrl-drag FROM viewController TO scrollView, connect to IBOutlet property.
This is what you have done.
(2) ctrl-drag FROM scrollView TO viewController, connect to delegate.
I do not think you have done this.
Explanation of step 2
UIScrollView has a built-in property called 'delegate'. The scrollView uses this property to send messages to it's delegate. You set this delegate in interface builder (step 2) or you can do it in code. For example in your viewController you could do this:
[myScrollView setDelegate:self];
which would set the viewController as the delegate for myScrollView. If you do it by linking in Interface Builder you don't need this code (and IB doesn't create any).
Either way what this actually does is set scrollView's delegate iVar to a pointer to the viewController. The great thing about using delegates like this is that the delegator (UIScrollView) doesn't have to know anything about the delegatee (in this case your UIViewController). This allows us to reuse UIScrollView so long as we observe it's delegate protocol.
Whenever the scrollView needs to notify it's delegate, internally it sends a message like this..
[self.delegate scrollViewDidScroll:self];
(you don't see that, it's in the scrollView's implementation).
The object that you have set as the delegate to scrollView needs to implement all of the required methods that the scrollView's delegate protocol declares, and can choose to implement any of the optional delegate methods. Here is the protocol
To work out which methods are required, read the UIScrollView class reference, which tells you this:
The UIScrollView class can have a delegate that must adopt the UIScrollViewDelegate protocol. For zooming and panning to work, the delegate must implement both viewForZoomingInScrollView: and scrollViewDidEndZooming:withView:atScale:; in addition, the maximum (maximumZoomScale) and minimum (minimumZoomScale) zoom scale must be different.
Everything else in the protocol is optional.
This delegate pattern is one you can easily implement yourself for your own object reuse, and is one of the most common ways of passing messages between decoupled objects in objective-C.

How to create UI elements programmatically

I'd like to be able to create new UI elements (a UIProgressView bar) in a separate UIViewController every time a user taps on a button.
How would I go about doing this?
To create a UIProgressView programmatically, it is simply a matter of using alloc and init, setting a frame, and adding a subview, like so:
//.h
#import <UIKit/UIKit.h>
#interface ExampleViewController : UIViewController {
//create the ivar
UIProgressView *_progressView;
}
/*I like to back up my iVars with properties. If you aren't using ARC, use retain instead of strong*/
#property (nonatomic, strong) UIProgressView *progressView;
#end
//.m
#implementation
#synthesize progressView = _progressView;
-(void)viewDidLoad {
/* it isn't necessary to create the progressView here, after all you could call this code from any method you wanted to and it would still work*/
//allocate and initialize the progressView with the bar style
self.progressView = [[UIProgressView alloc]initWithProgressViewStyle:UIProgressViewStyleBar];
//add the progressView to our main view.
[self.view addSubview: self.progressView];
//if you ever want to remove it, call [self.progressView removeFromSuperView];
}
Read this guide https://developer.apple.com/library/ios/#DOCUMENTATION/WindowsViews/Conceptual/ViewPG_iPhoneOS/CreatingViews/CreatingViews.html
Most of the UI elements create like this:
UIView *view = [[UIView alloc] initWithFrame:CGRect];
// set the property of the view here
// ...
// finally add your view
[ViewController.view addSubView:view];

UIView Buttons loaded with XIB do not work

I've loaded a UIView (FirstView.m) with a separate XIB (SecondView.xib), but the buttons in that XIB crash the app. The code for the buttons (IBOutlet & IBAction) are in SecondView.m.
Do I need to point the code from SecondView.m to FirstView.m? I tried using #import and #class... but was unsuccessful.
The code I'm using is completely valid... I'm pretty sure the issue has something to do with the XIB being loaded into the UIView... and then possibly losing its connection to the implementation file. Thoughts?
Thanks in advance!
FirstView.h
#import <UIKit/UIKit.h>
#interface FirstView : UIViewController {
IBOutlet UIView *SecondViewPopUP;
IBOutlet UIButton *openBTN;
}
#property (nonatomic, retain) UIView *SecondViewPopUP;
#property (nonatomic, retain) IBOutlet UIButton *openBTN;
-(IBAction)showPopUp:(id)sender;
FirstView.m
#synthesize SecondViewPopUP;
#synthesize openBTN
- (void)viewDidLoad {
SecondViewPopUP.alpha = 0;
// Add IncidentsViewController to view
SecondView *SecondV=[[SecondView alloc] init];
SecondV.view.frame = CGRectMake(0, 0, 262, 269);
SecondV.view.clipsToBounds = YES;
[SecondViewPopUP addSubview:SecondV.view];
SecondViewPopUP.frame = CGRectMake(0, 76, 262, 269);
[SecondV release];
}
-(IBAction)showPopUp:(id)sender {
NSLog(#"Stats Button was pressed");
[UIView beginAnimations:nil context:NULL];
[UIView setAnimationDuration:0.4];
SecondViewPopUP.alpha = 1;
[UIView commitAnimations];
}
SecondView.h
#import <UIKit/UIKit.h>
#interface ShareViewController : UIViewController {
IBOutlet UIButton *share_facebook;
IBOutlet UIButton *share_twitter;
}
#property (nonatomic, retain) IBOutlet UIButton *share_facebook;
#property (nonatomic, retain) IBOutlet UIButton *share_twitter;
-(IBAction)shareOnFB:(id)sender;
-(IBAction)shareOnTwitter:(id)sender;
SecondView.m
#synthesize share_twitter, share_facebook;
- (void)viewDidLoad {
[super viewDidLoad];
}
-(IBAction)shareOnFB:(id)sender {
NSLog(#"Shared on FB");
}
-(IBAction)shareOnTwitter:(id)sender {
NSLog(#"Shared on Twitter");
}
First of all FirstView (and presumably SecondView) is a UIViewController not a UIView so naming it "FirstViewController" would be much clearer. Views and view controllers are very different things.
Secondly you are adding a UIViewController's view as a subview of another view on the line "[SecondViewPopUP addSubview:SecondV.view];" That's not how UIViewControllers are expected to be used and the UIViewController programming guide recommends against it for good reason.
Each custom view controller object you create is responsible for managing all of the views in a single view hierarchy. In iPhone applications, the views in a view hierarchy traditionally cover the entire screen, but in iPad applications they may cover only a portion of the screen. The one-to-one correspondence between a view controller and the views in its view hierarchy is the key design consideration. You should not use multiple custom view controllers to manage different portions of the same view hierarchy. Similarly, you should not use a single custom view controller object to manage multiple screens worth of content.
Finally if you were to post the error listed when your app crashes we would probably see that you are attempting to send -shareOnFB: or -shareOnTwitter: messages to an instance of "FirstView" which does not implement them because your nib bindings are not configured appropriately ie you set the File's Owner of the nib to be "SecondView" and then loaded it with an instance of "FirstView" as its owner. Impossible to say for sure without more data.

Sharing a UIView between UIViewControllers in a UITabBarController

I have a UIScrollView that houses a gallery of images the user can scroll through. This view needs to be visible on each of three separate UIViewControllers that are housed within a UITabBarController. Right now, I have three separate UIScrollView instances in the UITabBarController subclass, and the controller manages keeping the three synchronized (when a user scrolls the one they can see, programmatically scrolling the other two to match, etc.), which is not ideal.
I would like to know if there is a way to work with only ONE instance of the UIScrollView, but have it show up only in the UIViewController that the user is currently interacting with. This would completely eliminate all the synchronization code. Here is basically what I have now in the UITabBarController (which is where all this is currently managed):
#interface ScrollerTabBarController : UITabBarController {
FirstViewController *firstView;
SecondViewController *secondView;
ThirdViewController *thirdView;
UIScrollView *scrollerOne;
UIScrollView *scrollerTwo;
UIScrollView *scrollerThree;
}
#property (nonatomic,retain) IBOutlet FirstViewController *firstView;
#property (nonatomic,retain) IBOutlet SecondViewController *secondView;
#property (nonatomic,retain) IBOutlet ThirdViewController *thirdView;
#property (nonatomic,retain) IBOutlet UIScrollView *scrollerOne;
#property (nonatomic,retain) IBOutlet UIScrollView *scrollerTwo;
#property (nonatomic,retain) IBOutlet UIScrollView *scrollerThree;
#end
#implementation ScrollerTabBarController
- (void)layoutScroller:(UIScrollView *)scroller {}
- (void)scrollToMatch:(UIScrollView *)scroller {}
- (void)viewDidLoad {
[self layoutScroller:scrollerOne];
[self layoutScroller:scrollerTwo];
[self layoutScroller:scrollerThree];
[scrollerOne setDelegate:self];
[scrollerTwo setDelegate:self];
[scrollerThree setDelegate:self];
[firstView setGallery:scrollerOne];
[secondView setGallery:scrollerTwo];
[thirdView setGallery:scrollerThree];
}
- (void)scrollViewDidEndDecelerating:(UIScrollView *)scrollView {
[self scrollToMatch:scrollView];
}
#end
The UITabBarController gets notified (as the scroll view's delegate) when the user scrolls one of the instances, and then calls methods like scrollToMatch: to sync up the other two with the user's choice.
Is there something that can be done, using a many-to-one relationship on IBOutlet or something like that, to narrow this down to one instance so I'm not having to manage three scroll views? I tried keeping a single instance and moving the pointer from one view to the next using the UITabBarControllerDelegate methods (calling setGallery:nil on the current and setGallery:scrollerOne on the next each time it changed), but the scroller never moved to the other tabs.
Thanks in advance!
Certainly you should use only one instance of your scroller view. And it will works fine without any troubles. Use method setGallery: like you did, just ensure you add your singleScrollerForAll view to view of current controller in setGallery method:
-(void)setGallery:(UIView *)aScrollerView{
[self.view addSubview:aScrollerView];
}
and call:
[firstView setGallery:singleScrollerForAll];
or
[secondView setGallery:singleScrollerForAll];
and no need to do anything in other two controllers, because when you call addSubview: the subView will be automatically removed from previous superview.