ios7 blank screen from framework - ios

Question

I have a framework that creates some views, the app that uses the framework calls a method from it and pass in the current view controller, the framework then calls presentModalViewController to display a view.
It was working just fine with iOS 6.1 SDK but when I updated to Xcode 5 and iOS 7 SDK I don't see the modal view anymore, instead all I get is a blank screen.
EDIT
Heres some code:
The Framework is called "testityi"
testityi.m
#import "TestViewController.h"
#implementation testitiy
- (NSString*) sayHi : (NSString*) name {
return [NSString stringWithFormat:#"Hello %#", name];
}
- (void) displayView:(UIViewController *)parentController {
TestViewController* controller = [[TestViewController alloc] init];
[parentController presentViewController:controller animated:YES completion:nil];
}
TestViewController is simply a view with a label that says "View from framework"
The framework itself works fine, calling sayHi method works just fine.
The third party app has a view with a label and a button which calls sayHi method and then displayView method, heres the view controller code:
MainViewController.m
- (IBAction)buttonPressed:(id)sender {
testitiy* framework = [[testitiy alloc] init];
NSString* msg = [NSString stringWithFormat:#"Calling sayHi method on framework...\n result: %#", [framework sayHi:#"John"]];
UIAlertView* alert = [[UIAlertView alloc] initWithTitle:#"sayHi method call" message:msg delegate:self cancelButtonTitle:#"Ok, show me the view" otherButtonTitles:nil, nil];
[alert show];
}
-(void) alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex {
if(buttonIndex == [alertView cancelButtonIndex]) {
testitiy* framework = [[testitiy alloc] init];
[framework displayView:self];
}
}
The alert button action is also working correctly, I added a NSLog before and its working.
After clicking the alert button a view is presented but instead of containing the label "View from framework" I get a blank screen.
You can see the code on Github
EDIT 2
I got it... I wasn't calling initWithBundle on the ViewController from the framework, I added the a custom init method that calls:
framework: TestViewController.m
+ (NSBundle *)frameworkBundle {
static NSBundle* frameworkBundle = nil;
static dispatch_once_t predicate;
dispatch_once(&predicate, ^{
NSString* mainBundlePath = [[NSBundle mainBundle] resourcePath];
NSString* frameworkBundlePath = [mainBundlePath stringByAppendingPathComponent:#"testity.bundle"];
frameworkBundle = [NSBundle bundleWithPath:frameworkBundlePath];
});
return frameworkBundle;
}
- (id) initWithFramework {
NSBundle* bundle = [[self class] frameworkBundle];
self = [super initWithNibName:#"TestViewController" bundle: bundle];
return self;
}
And changed testitiy.m
- (void) displayView:(UIViewController *)parentController {
TestViewController* controller = [[TestViewController alloc] initWithFramework];
[parentController presentViewController:controller animated:YES completion:nil];
//[parentController.navigationController pushViewController:controller animated:YES];
}
And now its working...
I hope this helps someone else but I'm guessing it was a stupid mistake of mine.
Sorry for all the trouble and thanks for your time!

Answer 1

So after a while I finally understand the issue:
When using a custom framework, all resources like images and NIB files have to be manually included in the third-party app so that it has access to those files.
My problem was that I was including the resources (stored in a bundle) into the third-party app but the framework was trying to display the View based on its own resources, which the app couldn't access, for that reason I was getting a blank screen.
I just needed to tell the framework to use the included bundle into the third-party app to display that View (using the initWithNibName: Bundle method).
See EDIT 2 in the question to see the code that solved my problem.
Hope this helps someone. :-)