How can I handle different views in XCode?
Let's say I want to show a different view when the user press a button.
UIViewController *viewSettings;
[viewSettings initWithNibName:(NSString *)#"SettingsViewController" bundle:(NSBundle *)nil];
This code don't work. The app crashes.
I have updated my XCode to the new version. How can I say my projects that they have to take the new SDK?
Thanks.
This is the correct line. Then you need to push it (pushViewController) onto a UINavigationController or add it to an existing view. Do a Google search for iPhone Beginner Tutorial First Application or something like that.
UIViewController *viewSettings = [SettingsViewController initWithNibName:#"SettingsViewController" bundle:nil];
1) You use a UIViewController to manage the view stack and ultimately which view is visible.
2) In your xCode project, modify the project or target "Base SDK" property. This will let you choose the minimum version of iOS to require of your users.
You need to read the Apple documentation for view controllers There are also some very good beginner books out there for iPhone programming
Related
I'm brand new in Xcode and have been able to scoot by with some fairly simple apps thanks to my previous programming experience, the Storyboard in Xcode, and most of all THIS WEBSITE.
One thing I haven't been able to figure out is how to make my app universal? The way I have my app set up is that it looks a lot like the iPhone home screen with pages and app icons. However, when I hit the little "Change to iPhone 5" button, 1) It only changes my FirstViewController and 2)My icons are all out of alignment.
Do I make another storyboard (If so, how?)? Do I make another view controller for each screen resolution? For either of those questions do I program a test to see which device I'm using and for it to choose the correct storyboard or ViewController? My app is currently set to universal, but I still haven't even been able to find the iPad resolution option for view controllers and stuff.
Please be as simplistic as you can. I have only been doing this for an extremely short time. Thanks for all your help both here and around this site!
So In order to get the iPad version working, follow these steps:
First go to your target settings, scroll down to "Deployment Info", and change it from iPhone to Universal
Next you will need to create a new Storyboard file. On the bar at the top go File>New>File and this thing should pop up:
After you have selected iOS>User Interface>Storyboard as shown above, click next and it will ask iPhone or iPad. After selecting iPad, the new file will be ready to map your interface for iPad. However, you need to make sure the app uses it. So go back to your target settings and scroll back down to "Deployment Info" and switch to iPad:
Set the "Main Interface" option to the name of your new storyboard file.
As for preparing for iPhone 5, that part can get a bit annoying. I find that the additional space is too small for any major additions but too large to be ignored easily. How you deal with it will vary greatly depending on what you app does. From what you described, with app icons like the iPhone screen, you will probably want to have an additional row of icons, just like the iOS. To do this, you can either manage it programatically or you may want to have seperate storyboards for iPhone 4 vs iPhone 5. If you want the separate storyboards, this question will have your solution.
To initialize storyboard:
CGSize iOSDeviceScreenSize = [[UIScreen mainScreen] bounds].size;
UIViewController *initialViewController;
if (iOSDeviceScreenSize.height == 480)
{
// Instantiate a new storyboard object using the storyboard file named Storyboard_iPhone35
UIStoryboard *iPhone35Storyboard = [UIStoryboard storyboardWithName:#"iPhone4" bundle:nil];
// Instantiate the initial view controller object from the storyboard
initialViewController = [iPhone35Storyboard instantiateInitialViewController];
}
if (iOSDeviceScreenSize.height == 568)
{
// iPhone 5 and iPod Touch 5th generation: 4 inch screen
// Instantiate a new storyboard object using the storyboard file named Storyboard_iPhone4
UIStoryboard *iPhone4Storyboard = [UIStoryboard storyboardWithName:#"iPhone5" bundle:nil];
initialViewController = [iPhone4Storyboard instantiateInitialViewController];
}
self.window.rootViewController = initialViewController;
[self.window makeKeyAndVisible];
return YES;
I have a newbie question about integrating two iOS apps. I have created an app in iOS 5 (my first app so I dont have any knowledge of iOS 4 except the fact thah there were xibs files instead of storyboard and also ARC was not included).
Now I have to include one older standalone app (built for iOS 4 with xibs and non ARC) to my iOS 5 app. Lets say that in my app on Main menu view there will be a new button opening the main menu of the other app.
So I did some research and find out how to disable ARC by the fno-objc-arc flag. Fine, now I have imported all the files of the second app to mine app and all the classes have the flag set.
I can still run my app without problem.
Now I have no idea how to let my new button to open the mainViewController of the old app - this app has MainWindow.xib (contains a window and one navigation controller). This MainWindow is set to be Main Interface in the old project. There are also some init call in appMainDelegate file. Where can I call them in my app?
Could anybody tell me what needs to be done. I have an idea, that I will add only one new UIViewController to my storyboard. This will be the starting point for the old app and than everything will work as it used to. Or will I have to create more controllers (for every xib) in my storyboard? This is where I dont know what to do. Any help much appriciated. thank you
Try doing something like the following, anything like it or simmular should work:
In the method of the button (the one you call your new button) have it execute the following code:
OldAppMainViewController *controller = [[OldAppMainViewController alloc] init];
//Here you can assign vallues to any properties that you might want to
[self.navigationController pushViewController:controller animated:YES];
That old apps main view controller should have a init with nub named function so it should work. If this does not work try something along the lines of:
OldAppMainViewController *controller = [[OldAppMainViewController alloc] initWithNibName:#"OldAppMainViewController" bundle:nil];
Where the NIB name is the .xib file name without the extension.
Also make sure that all connections in interface builder is setup correctly
Is there a convenient way to generate code from any new view controllers I've created on the storyboard? For example when you create a new iOS application, XCode will set up a skeleton class for your view controller.
Thanks!
I don't think so. You need to create a new ViewController subclass in XCode but uncheck the "Create Xib for this class" box (not sure if that is exactly what it says). Then select your newly made view controller in storyboard and change it to the class you just created.
Ok the skeleton you are talking about is just a template for your application. You are asking for a dynamic template generator from your storyboard and maybe Apple can figure out how to do this in a non distant future but in this moment I think you can't do that. After you created the storyboard file with your complex scheme you need to manually create all your viewController subclass you used in the storyboard. It's not a big deal ... I suppose your application doesn't have thousand ViewController so you can do it manually.
Apple are working hard to simplify developers job but Xcode can't do everything for you.
You can try to post this answer directly to Apple throughout the bugreport Apple website and post it as improvement to implement in future Xcode release.
Lets try it :)
I have an iPhone app with
FirstViewController and SecondViewController with respective views FirstView.xib and SecondView.xib.
Now I want to make this app work with both iPhone and iPad. For iPad I need to merge Firstview.xib and SecondView.xib into a single ThirdView-iPad.xib.
What would be the best approach? Do I need to write another ViewController class for iPad or can I use existing FirstViewController and SecondViewController with single xib?
My research so far says that there is no way to use multiple ViewControllers with single xib. Please let me know the best way to do this.
Thanks
if you are using Xcode4 you can use "transition to universal target" and it will do everything needed
http://xcodebook.com/2011/05/making-an-ios-target-universal/
if you dont have it then I recommend to keep controllers out of your xib. xib files will be only containing views for iphone and ipad but the controllers "can" be same. and you can control your logic from the rootviewcontroller, just an idea..it all depends on your project.
You would be best of to just create a new ViewController unless you're into masochism. Reusing in that way would most likely be to much trouble, and I'd go with aggregation or inheritance in the case you need to reuse logic in your ViewControllers.
I typically create a base ViewController, say XYZViewController and then create a XYZViewController_iPhone with all iPhone-specials and a separate XYZViewController_iPad for iPads. But if they're totally different I give them unique names and their own NIBs as well as ViewControllers.
There Are following Rules To Convert The Iphone App to Univarsal App
1) In Plist File Add NSMainNibFile~ipad .... MainWindow_ipad(ipad window).
2) Implement separate Names Xibs (Iphone & ipad)
3)in Target Targeted Device Family set to (iphone/ipad)
and set The Frames According To Ipad &iphone
For example
if(UI_USER_INTERFACE_IDIOM()==UIUserInterfaceIdiomPad)
{
btnHme.frame=CGRectMake(971,6, 32, 32); //ipad
}
else
{
btnHme.frame=CGRectMake(438,6, 32, 32); //iphone
}
cheers
In my app, I want to implement admob and now only I have started to learn about it. So any one please guide me and is there any nice tutorial or sample?
It's extremely simple. Follow the guide here: http://developer.admob.com/wiki/IPhone#AdMob_iPhone_SDK
Once you have the SDK up, you simply do:
AdMobView *ad = [AdMobView requestAdWithDelegate:<your delegate>]; // start a new ad request
ad.frame = CGRectMake(0, 432, 320, 48); // set the frame, in this case at the bottom of the screen
[self.window addSubview:ad]; // attach the ad to the view hierarchy; self.window is responsible for retaining the ad
Download the Admob SDK for iPhone and look at the example projects. It's very simple.
If you choose to use the Interface Builder approach and follow their steps
there is one step missing: Add an AdViewController object to your UIViewController.h/m file and use that as the referencing object in IB. Otherwise you'll get the error:
"Must implement required method
-currentViewControllerForAd:(AdMobView *)adView in your delegate"
I realize this is a basic assumption, but it caught me for a minute and i've implemented AdMob 3 times in the past (using different methods, mind you).
Add an ad to a view using Interface Builder
Add AdViewController.h and AdViewController.m to your project (located in the IBSupport subdirectory).
Open Interface Builder.
Place a 320x48 UIView where you want the ad to appear.
Add an Object, and change its type to AdViewController.
Set the view outlet of the AdViewController to your UIView.
Set the currentViewController outlet of the AdViewController
to the UIViewController owning the xib.
Edit AdViewController.m to make sure that your publisher ID and
other options are set correctly.
Good thing to know, Mike. They also left out one step in Interface Builder. You need to select File's Owner, and drag from Ad View Controller to the new Ad View Object. I simply cannot comprehend why Admob would leave out these details, especially when many new programmers join they're community all the time. They really need help in the documentation & tutorials department.