I'm trying to scan my application (window based with xib) for memory leaks, but when I'm running the app with Leaks tool, it crashes with exception
Terminating app due to uncaught exception 'NSUnknownKeyException', reason: '[<UIWindow 0x4d20ec0> setValue:forUndefinedKey:]: this class is not key value coding-compliant for the key rootViewController.'
It's strange, the app runs well in simulator and on device.
App delegate code:
#import "myAppDelegate.h"
#implementation myAppAppDelegate
#synthesize window;
#synthesize myController;
#pragma mark -
#pragma mark Application lifecycle
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
NSLog(#"didFinishLaunchingWithOptions");
[window addSubview:myController.view];
[window makeKeyAndVisible];
return YES;
}
- (void)applicationWillResignActive:(UIApplication *)application {
}
- (void)applicationDidBecomeActive:(UIApplication *)application {
}
- (void)applicationWillTerminate:(UIApplication *)application {
=}
#pragma mark -
#pragma mark Memory management
- (void)applicationDidReceiveMemoryWarning:(UIApplication *)application {
}
- (void)dealloc {
[window release];
[super dealloc];
}
#end
This error usually occurs when there's a property in Interface Builder that is not set correctly, or does not exist anymore (look for warnings in Interface Builder).
As to why it's crashing only in Instruments may be because it defaults to run against your release build, and there may be some optimizations that are less forgiving for faulty configurations.
Does this work in the normal simulator, or on device without issues?
Otherwise did you implement a custom root view, ie using a different launch NIB?
it would be best if you upload your app delegate code
Related
didUpdateLocations is never called, instead didFailWithError is called with denied code kCLErrorDenied.
Here are the things that i did:
#import "ViewController.h"
#import CoreLocation;
#interface ViewController () <CLLocationManagerDelegate>
#property (strong, nonatomic) CLLocationManager *locationManager;
#end
#implementation ViewController
- (void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
self.locationManager = [[CLLocationManager alloc] init];
self.locationManager.delegate = self;
// Check for iOS 8. Without this guard the code will crash with "unknown selector" on iOS 7.
if ([self.locationManager respondsToSelector:#selector(requestWhenInUseAuthorization)]) {
[self.locationManager requestWhenInUseAuthorization];
}
[self.locationManager startUpdatingLocation];
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
- (void)locationManager:(CLLocationManager *)manager didUpdateLocations:(nonnull NSArray<CLLocation *> *)locations
{
NSLog(#"update");
}
- (void)locationManager:(CLLocationManager *)manager didFailWithError:(nonnull NSError *)error
{
NSLog(#"error");
}
#end
Inserted NSLocationWhenInUseUsageDescription and NSLocationAlwaysUsageDescription to the info.plist of the app. Enabled Background Modes in Capabilities with Location updates selected. Get help from the very famous blog post. I receive Location Access Request popup and allow the app to access location.
But i couldnt managed to get location updates. It works in IPAD with IOS 8 but not work at ipad with IOS version 9.3.2. How can i make location updates work in IOS 9.3.2?
trying following thing may resolve your issue:
go to settings and reset your location services
reset your network settings
restarting the simulator
also, if you have Scheme/Edit Scheme/Options/Allow Location Simulation checked but don't have a default location set.
Add NSLocationAlwaysUsageDescription to your plist as type string if using Always authorization. Also, do the same for NSLocationWhenInUseUsageDescription same way if using WhenInUse authorization.
For detail check answers here:
didFailWithError: Error Domain=kCLErrorDomain Code=0 "The operation couldn’t be completed. (kCLErrorDomain error 0.)"
and IOS 9 Error Domain=kCLErrorDomain Code=0 "(null)"
//
// AppDelegate.m
// Foody
//
// Created by Iceeiei on 5/2/15.
// Copyright (c) 2015 pondandfriend. All rights reserved.
//
#import "AppDelegate.h"
#import "ViewController.h"
#import "RecipeList.h"
#interface AppDelegate ()
#end
#implementation AppDelegate
#synthesize window = _window;
#synthesize viewController = _viewController;
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
self.viewController = [[ViewController alloc]initWithNibName:#"ViewController" bundle:nil];
RecipeList *recipeList = [[RecipeList alloc] initWithNibName:#"RecipeList" bundle:nil];
self.window.rootViewController = recipeList;
[self.window makeKeyAndVisible];
return YES;
}
- (void)applicationWillResignActive:(UIApplication *)application {
// Sent when the application is about to move from active to inactive state. This can occur for certain types of temporary interruptions (such as an incoming phone call or SMS message) or when the user quits the application and it begins the transition to the background state.
// Use this method to pause ongoing tasks, disable timers, and throttle down OpenGL ES frame rates. Games should use this method to pause the game.
}
- (void)applicationDidEnterBackground:(UIApplication *)application {
}
- (void)applicationWillEnterForeground:(UIApplication *)application {
}
- (void)applicationDidBecomeActive:(UIApplication *)application {
// Restart any tasks that were paused (or not yet started) while the application was inactive. If the application was previously in the background, optionally refresh the user interface.
}
- (void)applicationWillTerminate:(UIApplication *)application {
// Called when the application is about to terminate. Save data if appropriate. See also applicationDidEnterBackground:.
}
#end
Error 1:
property implementation must have its declaration in interface 'Appdelegate'
Error 2:
Property'viewController' not found on object of type 'AppDelegate'
Is there any way to fix this?
It looks like you haven't added the #property notation for your ViewController in the .h. Add the following to AppDelegate.h:
#propery (nonatomic) ViewController *viewController;
// Created by Robert Van Gilder on 30/05/2014.
// Copyright (c) 2014 Robert Van Gilder. All rights reserved.
//
#import "AppDelegate.h"
#import <FacebookSDK/FacebookSDK.h>
#import <Parse/Parse.h>
#implementation AppDelegate
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
[PFFacebookUtils initializeFacebook];
{[Parse setApplicationId:#"ycWShHVTsY7Xawt0dupTN1YMWFeyMLlhG7K9R0rZ"
clientKey:#"8AmzExUoqvmppa5k3eaS37RBNB6c1StmlysvvjBr"];}
{[PFAnalytics trackAppOpenedWithLaunchOptions:launchOptions];}
UIStoryboard *storyboard = [UIStoryboard storyboardWithName:#"MainStoryboard" bundle:nil];
UIViewController* initialViewController = [storyboard instantiateViewControllerWithIdentifier:#"MainViewController"];
self.window.rootViewController = initialViewController;
[self.window makeKeyAndVisible];
return YES;
}
- (BOOL)application:(UIApplication *)application
openURL:(NSURL *)url
sourceApplication:(NSString *)sourceApplication
annotation:(id)annotation {
return [FBAppCall handleOpenURL:url
sourceApplication:sourceApplication
withSession:[PFFacebookUtils session]];
}
- (void)applicationDidBecomeActive:(UIApplication *)application {
[FBAppCall handleDidBecomeActiveWithSession:[PFFacebookUtils session]];
}
- (void)applicationWillResignActive:(UIApplication *)application
{
// Sent when the application is about to move from active to inactive state. This can occur for certain types of temporary interruptions (such as an incoming phone call or SMS message) or when the user quits the application and it begins the transition to the background state.
// Use this method to pause ongoing tasks, disable timers, and throttle down OpenGL ES frame rates. Games should use this method to pause the game.
}
- (void)applicationDidEnterBackground:(UIApplication *)application
{
// Use this method to release shared resources, save user data, invalidate timers, and store enough application state information to restore your application to its current state in case it is terminated later.
// If your application supports background execution, this method is called instead of applicationWillTerminate: when the user quits.
}
- (void)applicationWillEnterForeground:(UIApplication *)application
{
// Called as part of the transition from the background to the inactive state; here you can undo many of the changes made on entering the background.
}
- (void)applicationDidBecomeActive:(UIApplication *)application
{
// Restart any tasks that were paused (or not yet started) while the application was inactive. If the application was previously in the background, optionally refresh the user interface.
}
- (void)applicationWillTerminate:(UIApplication *)application
{
// Called when the application is about to terminate. Save data if appropriate. See also applicationDidEnterBackground:.
}
#end
I get the error in the title at
- (void)applicationDidBecomeActive:(UIApplication *)application. I don't get why this happens. I'm using the Parse SDK along with the Facebook login, and I'm following Parse's instructions, however when I add this code part below, the compiler doesn't understand it properly and creates various errors.
- (BOOL)application:(UIApplication *)application
openURL:(NSURL *)url
sourceApplication:(NSString *)sourceApplication
annotation:(id)annotation {
return [FBAppCall handleOpenURL:url
sourceApplication:sourceApplication
withSession:[PFFacebookUtils session]];
}
- (void)applicationDidBecomeActive:(UIApplication *)application {
[FBAppCall handleDidBecomeActiveWithSession:[PFFacebookUtils session]];
}
You have a duplicate declaration of -applicationDidBecomeActive. The first one is indented incorrectly, just below -application:openURL:sourceApplication:annotation:. The second is between -applicationWillEnterForeground: and -applicationWillTerminate:.
I am teaching myself Objective-C and iOS programming with "IOS Programming: The Big Nerd Ranch guide (2nd Edition) and I have run into an issue where the tutorial wants me to create connections to an App Delegate object, but this object does not appear in the Objects list in Interface builder for me. I am pretty sure its either a typo or perhaps a version different as the book is slightly behind my version of Xcode (4.2). I have included the code. I am fairly certain that the MOCAppDelegate object is what should be showing up in IB, but I am not yet familiar enough to know what code changes I need to make that happen. Specific question: How do I adjust the code below so that I get an object in the Objects list in IB so that I can perform the connections as instructed in the tutorial graphic?
Note: I researched and found this: Having trouble hooking up instance variables to AppDelegate but this solution did not work for me (or I did not implement it correctly)
Header File
#import <UIKit/UIKit.h>
#import <CoreLocation/CoreLocation.h>
#import <MapKit/MapKit.h>
#interface MOCAppDelegate : UIResponder <UIApplicationDelegate, CLLocationManagerDelegate>
{
CLLocationManager *locationManager;
IBOutlet MKMapView *worldView;
IBOutlet UIActivityIndicatorView *activityIndicator;
IBOutlet UITextField *locationTitleField;
}
#property (strong, nonatomic) IBOutlet UIWindow *window;
#end
Implementation File
#import "MOCAppDelegate.h"
#implementation MOCAppDelegate
#synthesize window = _window;
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
//Create location manager object
locationManager = [[CLLocationManager alloc] init];
[locationManager setDelegate:self];
//We want all results from the location manager
[locationManager setDistanceFilter:kCLDistanceFilterNone];
//And we want it to be as accurate as possible
//regardless of how much time/power it takes
[locationManager setDesiredAccuracy:kCLLocationAccuracyBest];
//Tell our location manager to start looking for it location immediately
[locationManager startUpdatingLocation];
//We also want to know our heading
if (locationManager.headingAvailable == true) {
[locationManager startUpdatingHeading];
}
self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
// Override point for customization after application launch.
self.window.backgroundColor = [UIColor darkGrayColor];
[self.window makeKeyAndVisible];
return YES;
}
- (void)locationManager:(CLLocationManager *)manager
didUpdateToLocation:(CLLocation *)newLocation
fromLocation:(CLLocation *)oldLocation
{
NSLog(#"%#", newLocation);
}
- (void)locationManager:(CLLocationManager *)manager
didUpdateHeading:(CLHeading *)newHeading
{
NSLog(#"%#", newHeading);
}
- (void)locationManager:(CLLocationManager *)manager
didFailWithError:(NSError *)error
{
NSLog(#"Could not find location: %#", error);
}
- (void)dealloc
{
if( [locationManager delegate] == self)
[locationManager setDelegate:nil];
}
- (void)applicationWillResignActive:(UIApplication *)application
{
/*
Sent when the application is about to move from active to inactive state. This can occur for certain types of temporary interruptions (such as an incoming phone call or SMS message) or when the user quits the application and it begins the transition to the background state.
Use this method to pause ongoing tasks, disable timers, and throttle down OpenGL ES frame rates. Games should use this method to pause the game.
*/
}
- (void)applicationDidEnterBackground:(UIApplication *)application
{
/*
Use this method to release shared resources, save user data, invalidate timers, and store enough application state information to restore your application to its current state in case it is terminated later.
If your application supports background execution, this method is called instead of applicationWillTerminate: when the user quits.
*/
}
- (void)applicationWillEnterForeground:(UIApplication *)application
{
/*
Called as part of the transition from the background to the inactive state; here you can undo many of the changes made on entering the background.
*/
}
- (void)applicationDidBecomeActive:(UIApplication *)application
{
/*
Restart any tasks that were paused (or not yet started) while the application was inactive. If the application was previously in the background, optionally refresh the user interface.
*/
}
- (void)applicationWillTerminate:(UIApplication *)application
{
/*
Called when the application is about to terminate.
Save data if appropriate.
See also applicationDidEnterBackground:.
*/
}
#end
Drag an instance of NSObject into your .xib and drop it in the Objects section just as in the instructions you've got. Then select it and change its type in the identity inspector (on the right side, where it says "Custom Class") to "MOCAppDelegate" (or whatever class you like).
You should drag an "NSObject" from the Object Library onto your storyboard on the black bar underneath the view controller you want to connect. Then, click on the NSObject and in the identity inspector change the class to AppDelegate. Then you can create the connection to the AppDelegate.
MOCAppDelegate = AppDelegate
The code was generated for you when you named the project. The delegate of the UIApplication object is usually named slightly different depending on the name of the project.
(There's no doubt that any book in print was using an older Xcode.)
Select Files Owner and the Identity Inspector (command-alt-2) to confirm the file's owner is a place holder for the app delegate.
I have a method DoSomething() defined in my AppDelegate.
This is the full implementation of my appDelegate:
#import "SampleAppAppDelegate.h"
#import <Foundation/Foundation.h>
#define DoSomething()\
NSConnection *conn = [NSConnection connectionWithRegisteredName:#"myConnection" host:nil];\
NSLog(#"Compiler seems to have found the class %#", [NSConnection class]);\
#implementation SampleAppAppDelegate
#synthesize window;
#pragma mark -
#pragma mark Application lifecycle
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
// Override point for customization after application launch.
DoSomething();
[self.window makeKeyAndVisible];
return YES;
}
- (void)dealloc {
[window release];
[super dealloc];
}
#end
Although the implementation is working fine as expected (the log is recognizing the class)
the compiler is displaying a warning:
warning: no '+connectionWithRegisteredName:host:' method found
Any ideas how I can solve this issue?
How can I modify the implementation to get rid of the warning?
Ah, you’re targeting iOS. NSConnection is not available in the public API for the iOS SDK.