I've just put a photo picker into my project, and everything works fine. The only thing is it insists on giving me the following warning where I set the delegate -
Assigning to 'id<UINavigationControllerDelegate,UIImagePickerDelegate>' from incompatible type 'AddTargetViewController *'
I have set up the delegate in the AddTargetViewController.h in the normal way -
#interface AddTargetViewController : UIViewController <UIImagePickerControllerDelegate>
and I can't see anything wrong. As I say, it works fine, and all the delegate methods fire off as they should.
-(void)takePhoto {
UIImagePickerController *imagePicker = [[[UIImagePickerController alloc] init] autorelease];
imagePicker.delegate = self; // *** warning on this line ***
imagePicker.sourceType = UIImagePickerControllerSourceTypeCamera;
imagePicker.cameraCaptureMode = UIImagePickerControllerCameraCaptureModePhoto;
[self presentModalViewController:imagePicker animated:YES];
}
Thanks for any help!
This is duplicate question to iPhone - UIImagePickerControllerDelegate inheritance.
In short your view controller has to conform to UINavigationControllerDelegate in addition to UIImagePickerDelegate.
Along with your UIImagePickerControllerDelegate just add UINavigationControllerDelegate in your .h file and it should work fine.
Related
Does Gluon Mobile have any guidance on implementing a share button? My goal is to be able to share a string containing a link to different apps on the phone. At the moment, I need this only for the iOS implementation. I was able to find this link that provides a simple way to do this in Objective-C:
- (IBAction)shareButton:(UIBarButtonItem *)sender
{
NSString *textToShare = #"Look at this awesome website for aspiring iOS Developers!";
NSURL *myWebsite = [NSURL URLWithString:#"http://www.codingexplorer.com/"];
NSArray *objectsToShare = #[textToShare, myWebsite];
UIActivityViewController *activityVC = [[UIActivityViewController alloc] initWithActivityItems:objectsToShare applicationActivities:nil];
NSArray *excludeActivities = #[UIActivityTypeAirDrop,
UIActivityTypePrint,
UIActivityTypeAssignToContact,
UIActivityTypeSaveToCameraRoll,
UIActivityTypeAddToReadingList,
UIActivityTypePostToFlickr,
UIActivityTypePostToVimeo];
activityVC.excludedActivityTypes = excludeActivities;
[self presentViewController:activityVC animated:YES completion:nil];
}
Looking at the GoNative application example on the Gluon website, it seems like I can use the above code snippet where needed as the native iOS code. Do I have to update the ios build gradle to account for the UIActivity class mentioned in the first link above?
Update*
I have been able to get this to work based on help in this question here.
However when trying to install the native library, I get this error which is understandable as self is unknown in the scope of the code. How would I be able to do this? Instantiate a popover or dialog and pass the activityVC to it?
/Users/ashishsharma/NetBeansProjects/konfamdbranch/src/ios/native/Share.m:25:6: error: use of undeclared identifier 'self' [self presentViewController:activityVC animated:YES completion:nil];
So I was able to solve this using examples on the internet (shown above) along with going through the existing code for the Barcode Scan Service. The issue I was experiencing with the above code was that the present view controller could not be found. However, looking at the bit bucket source for Barcode Scan, I was able to get the root view with the following code:
if(![[UIApplication sharedApplication] keyWindow])
{
NSLog(#"key window was nil");
return;
}
// get the root view controller
UIViewController *rootViewController = [[[UIApplication sharedApplication] keyWindow] rootViewController];
if(!rootViewController)
{
NSLog(#"rootViewController was nil");
return;
}
Then in the code snippet I placed in the question, replace self with rootViewController:
[rootViewController presentViewController:activityVC animated:YES completion:nil];
This leads to the modified code snippet:
#import <UIKit/UIKit.h>
#include "/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/System/Library/Frameworks/JavaVM.framework/Versions/A/Headers/jni.h"
JNIEXPORT void JNICALL Java_com_gluonhq_charm_down_plugins_ios_IOSShareService_shareMessage
(JNIEnv *env, jclass jClass, jstring jMessage) {
if(![[UIApplication sharedApplication] keyWindow])
{
NSLog(#"key window was nil");
return;
}
// get the root view controller
UIViewController *rootViewController = [[[UIApplication sharedApplication] keyWindow] rootViewController];
if(!rootViewController)
{
NSLog(#"rootViewController was nil");
return;
}
NSString *textToShare = #"Check out this site!";
NSURL *myWebsite = [NSURL URLWithString:#"http://www.google.com/"];
NSArray *objectsToShare = #[textToShare, myWebsite];
UIActivityViewController *activityVC = [[UIActivityViewController alloc] initWithActivityItems:objectsToShare applicationActivities:nil];
NSArray *excludeActivities = #[UIActivityTypeAirDrop,
UIActivityTypePrint,
UIActivityTypeAssignToContact,
UIActivityTypeSaveToCameraRoll,
UIActivityTypeAddToReadingList,
UIActivityTypePostToFlickr,
UIActivityTypePostToVimeo];
activityVC.excludedActivityTypes = excludeActivities;
[rootViewController presentViewController:activityVC animated:YES completion:nil];
}
Note I followed the GoNative application to generate my objective-c/ios files correctly.
This leads to a minimal functionality share implementation only because I don't have Facebook installed on the IPhone simulator.
i want to add Airdrop sharing to my spritekit game
It dosent work using this code:
UIActivityViewController *controller = [[UIActivityViewController alloc] initWithActivityItems:objectsToShare applicationActivities:nil];
[self presentViewController:controller animated:YES completion:nil]
I am thinking the issue is where you have the code you posted. You possibly have it in viewDidLoad of your UIViewController.
Do this in your UIViewController :
-(void)viewDidAppear:(BOOL)animated
{
// assuming you are creating objectsToShare here or before this point
UIActivityViewController *controller = [[UIActivityViewController alloc] initWithActivityItems:objectsToShare applicationActivities:nil];
[self presentViewController:controller animated:YES completion:nil]
}
I believe the issue is that the view is not fully configured when you are trying to add your UIActivityViewController.
I believe that the bounds and some other properties of the view are not yet properly configured in the viewDidLoad method, which results in a failure to display it.
I have the following code to load a UIImagePickerController which works fine.
UIImagePickerController *mediaUI = [[UIImagePickerController alloc] init];
mediaUI.sourceType = UIImagePickerControllerSourceTypeSavedPhotosAlbum;
mediaUI.mediaTypes = [[NSArray alloc] initWithObjects: (NSString *) kUTTypeMovie, nil];
mediaUI.delegate = self;
[controller presentModalViewController: mediaUI animated: YES];
return YES;
I would like to load a modal view with some help information on how to use the UIImagePickerController:
UIStoryboard *storyboard = self.storyboard;
HelpViewController *svc = [storyboard instantiateViewControllerWithIdentifier:#"HelpViewController"];
[self presentViewController:svc animated:YES completion:nil];
How can I display the UIImagePickerController after the user dismisses the HelpViewController view?
Don't be tempted to move directly from HelpViewController to UIImagePickerController, you need to get there via your mainViewController.
Let's put your code into a method...
- (void) presentImagePicker {
UIImagePickerController *mediaUI = [[UIImagePickerController alloc] init];
mediaUI.sourceType = UIImagePickerControllerSourceTypeSavedPhotosAlbum;
mediaUI.mediaTypes = [[NSArray alloc] initWithObjects: (NSString *) kUTTypeMovie, nil];
mediaUI.delegate = self;
[controller presentModalViewController: mediaUI animated: YES];
return YES;
}
(Note that presentModalViewController:animated is depracated since ~iOS5, and you should really replace it with
[controller presentViewController:mediaUI animated:YES completion:nil];)
Let's call your viewControllers mainVC, helpVC and imageVC. There are two ways you can implement this.
method 1 - performSelector
The quick-and-slightly-dirty solution is to do this in your helpVC's dismiss button method:
- (IBAction)dismissHelpAndPresentImagePicker:(id)sender
{
UIViewController* mainVC = self.presentingViewController;
[mainVC dismissViewControllerAnimated:NO completion:
^{
if ([mainVC respondsToSelector:#selector(presentImagePicker)])
[mainVC performSelector:#selector(presentImagePicker)];
}];
}
It's slightly dirty because you need to ensure that presentImagePicker is implemented in mainVC - the compiler will give you no warnings if it is not. Also you are running a completion block after it's object has been dismissed, so there's no certainty it's going to work (in practice, it does, but still...)
Note that you have to assign the pointer self.presentingViewController's to a local variable (mainVC). That's because when helpVC is dismissed, it's presentingViewController property is reset to nil, so by the time you get to run the completion block you cannot use it. But the local variable mainVC is still valid.
method 2 - protocol/delegate
The clean way to do this is to use a protocol in helpVC to declare a delegate method, and make mainVC the delegate. This way the compiler will keep track of everything and warn you if it is not correctly implemented.
Here are the steps to do that:
In helpVC.h add this protocol above the #interface section:
#protocol helpVCDelegate
- (void) dismissHelpAndPresentImagePicker;
#end
In helpVC.h interface section declare a property for its delegate:
#property (nonatomic, weak) id <helpVCDelegate> delegate;
(the <helpVCDelegate> tells the compiler that the delegate is expected to conform to the protocol, so it will have to implement dismissHelpAndPresentImagePicker)
In helpVC.m your method can now look like this:
- (IBAction)dismissHelpAndPresentImagePicker:(id)sender
{
[self.delegate dismissHelpAndPresentImagePicker];
}
In MainVC, when you create HelpVC (=svc in your code), set MainVC as it's delegate:
HelpViewController *svc = [storyboard instantiateViewControllerWithIdentifier:#"HelpViewController"];
svc.delegate = self;
[self presentViewController:svc animated:YES completion:nil];
And be sure to implement the delegate method dismissHelpAndPresentImagePicker
- (void) dismissHelpAndPresentImagePicker
{
[self dismissViewControllerAnimated:NO completion:^{
[self presentImagePicker];
}];
}
Personally I would always use method 2. But I offered up a that solution earlier today to a similar question, and the questioner seemed to think protocol/delegate was overcomplicated. Maybe my answer just made it seem so, I have tried to simplify it here.
I am trying to follow the apple photopicker example which has an appdelegate object in an .xib file. How does an appdelegate object get into a xib file, and why is it important?
In my app I want a navigation controller like the photopicker example has. My test work has not included a navigation controller and I am having difficulty inserting one into my test work now that it has just a view controller because the interface builder seems to have made up its mind to not allow the addition. Will it be easiest for me to just start over with a new app that has the navigation controller architecture and then add in copies of my test work methods and classes. Or is starting over unnecessary? I suspect that inserting the appdelegate object into the xib would allow me to use the exist test work more directly.
update 0
I think I followed the instructions in your answer. Xcode suggested _viewController and I changed that. My app is for both iPad and iPhone (and I am working only on iPad now), so it is a little more complicated, I think. I compile fine, but I still see no appdelegate object in my xib file even though PhotoPicker's xib file has one.
I suspect I need to hook up some objects still, but I could use some help with that, too. In PhotoPicker the Connections Inspector for the Navigation Controller says that the Referencing Outlet is between navController and AppDelegate, and the Connections Inspector for the AppDelegate says that the Referencing Outlet is between delegate and File's Owner. But because my xib file has no (BS)AppDelegate object, I don't know how to hook up without it.
#interface BSAppDelegate ()
#property (nonatomic, retain) IBOutlet UINavigationController *navigationController;
#end
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
// Override point for customization after application launch.
if ([[UIDevice currentDevice] userInterfaceIdiom] == UIUserInterfaceIdiomPhone) {
self.viewController = [[BSViewController alloc] initWithNibName:#"BSViewController_iPhone" bundle:nil];
} else {
self.viewController = [[BSViewController alloc] initWithNibName:#"BSViewController_iPad" bundle:nil];
}
UINavigationController *navigationController = [[UINavigationController alloc] initWithRootViewController:_viewController];
self.window.rootViewController = navigationController;
[self.window makeKeyAndVisible];
return YES;
}
update 0
Inside (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions, you can add uinavigationcontroller like this:
UIViewController *viewController = … //load your first view controller with the initial xib here
UINavigationController *navigationController = [[UINavigationController alloc] initWithRootViewController:viewController];
self.window.rootViewController = navigationController;
everything works in my code, but I get always warning by "swipeLeft.delegate = self;"
The "self" is marked by this warning.
The warning is : Passing 'UIWebView *' to parameter of incompatible type
and
Passing 'viewCont *const __strong' to parameter of incompatible type "id UIGestureRecognizerDelegate
What can I do??
My code:
#import "viewCont.h"
#implementation viewCont
#synthesize webView = webView_;
- (void)viewDidLoad
{
//...code
// add Left
UISwipeGestureRecognizer *swipeLeft = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:#selector(swipeLeftAction:)];
swipeLeft.direction = UISwipeGestureRecognizerDirectionLeft;
swipeLeft.delegate = self;
[webView_ addGestureRecognizer:swipeLeft];
//code....
}
Regarding line:
swipeLeft.delegate = self;
Your controller needs to implement UIGestureRecognizerDelegate like follows:
#interface viewCont : UIViewController<UIGestureRecognizerDelegate> {
}
#end
I don't see any problematic code regarding webView warning in provided code.
Is this class a child of UIWebView?
You are setting the target to self, make sure that that object is an instance or subclass of UIWebView. If you have the WebView set up as an instance variable you will need to set the target of the gesture recognizer to that instance.