Hi I am looking for a way to perform a database fetch at start up and keep those items in an array.
My solution, although crude was to create an extern variable in viewDidFinishLaunchingWithOptions
I used
appdelegate.h
extern NSArray *listArray;
then
appdelegate.m
NSArray *listArray;
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
listArray = [self createGlobalArray];
//other startup code, etc...
The problem is that when I go to any view controller and for example in viewdidload I say
VC1.m
-(void)viewDidLoad{
myVCArray = [NSArray arrayWithArray:listArray];
}
I get two errors: Apple Match-O linker error (directory not found...)
How do i fix this error?
Also is there a better way to do this?
Thank you
Usually linker errors are because things aren't being properly included in your build settings somewhere. I'd make sure that Build Phases > Compile Sources as well as Build Phases > Linked Libraries contain all the files your project needs.
Related
Currently in React-Native, according to the documentation, to build your iOS app for production, you need to :
change your scheme to Release
change your AppDelegate.m to load the correct bundle
change your Info.pList for ATS
This is a strong violation of 12 factor config recommandation, and it leads to mistakes being made in a continuous integration process.
RN does not provide either out-of-the box strategies to know the configuration environment in the JS code, leading to the existence of the package react-native-config, which does a great job already, but is not perfect (Xcode is not fully supported).
Why is it so? Is it because there are actually so few RN app in production today that nobody cares about this? Can we do better than react-native-config so that steps listed above are not required? I would like a command line that archives my app in the same way that I can run cd android && ./gradlew assembleRelease, without changing anything to my config.
EDIT:
Fastlane makes deployment a lot easier through its gym command (thank you Daniel Basedow). Apparently, the philosophy of Xcode is to call environments "schemes", only you cannot store variables in them, or know which scheme you're running in your code... Anyway, David K. Hess found a great way to export your scheme name in your Info.plist, and then in your Objective C code, which means I'm now able to chose my bundle according to the current scheme, and not touch my code.
Here is my code:
NSString *schemeName = [[[NSBundle mainBundle] infoDictionary] valueForKey:#"SchemeName"];
if ([schemeName isEqualToString:#"scheme1"]) {
jsCodeLocation = [NSURL URLWithString:#"http://localhost:8081/index.ios.bundle?platform=ios&dev=true"];
} else if ([schemeName isEqualToString:#"scheme2"]) {
jsCodeLocation = [NSURL URLWithString:#"http://<my_local_ip_address>:8081/index.ios.bundle?platform=ios&dev=true"];
} else if ([schemeName isEqualToString:#"scheme3"]) {
jsCodeLocation = [[NSBundle mainBundle] URLForResource:#"main" withExtension:#"jsbundle"];
}
Now my problem is : I also want to know which scheme I'm running in my JS code. react-native-config's way is self-described as hacky, and overly complicated considering the fact the information is already in my Objective C code. Is there a way to bridge this information to my JS code?
Only knowing which scheme I'm running is not as good as being able to set environment variables, but at least I'll be able to switch between environments only by changing my scheme.
EDIT 2:
I managed to export my scheme to my JS code. I created a cocoa touch class with the following code:
// RNScheme.h
#import <Foundation/Foundation.h>
#import "RCTBridgeModule.h"
#interface RNScheme : NSObject <RCTBridgeModule>
#end
// RNScheme.m
#import "RNScheme.h"
#interface RNScheme()
#end
#implementation RNScheme
{
}
RCT_EXPORT_MODULE()
- (NSDictionary *)constantsToExport
{
NSString *schemeName = [[[NSBundle mainBundle] infoDictionary] valueForKey:#"SchemeName"];
NSLog(#"%#", schemeName);
return #{
#"scheme_name": schemeName,
};
}
#end
and then in my JS code:
import {NativeModules} from 'react-native'
let scheme = NativeModules.RNScheme.scheme_name
EDIT 3:
There is actually another way than using schemes. You can create new "configurations" ("Release" and "Debug" are called configurations) with the following steps (thanks CodePush):
Open up your Xcode project and select your project in the Project
navigator window
Ensure the project node is selected, as opposed to one of your
targets
Select the Info tab
Click the + button within the Configurations section and select
which configuration you want to duplicate
Then you can define keys with different values according to your configuration.
Select your app target
Chose Build Settings
Go to User-Defined section (at the bottom of the scroll area)
You can define constants with a different value according to your configuration (for instance API_ENDPOINT)
You can then reference this value in your Info.plist file :
Open your Info.plist file
Create a new value and give it a name (ApiEndpoint)
Give it the value $(API_ENDPOINT) or whatever name you gave to your constant
Now you can reference this value in your code using the code I gave you in my second edit to this question.
You can create one scheme per configuration to switch quickly from one to the other, or change the build configuration each time (option click on the run button).
In your AppDelegate you can use the correct bundle like this
#ifdef DEBUG
jsCodeLocation = [NSURL URLWithString:#"http://localhost:8081/index.ios.bundle?platform=ios&dev=true"];
#else
jsCodeLocation = [[NSBundle mainBundle] URLForResource:#"main" withExtension:#"jsbundle"];
#endif
When you do a release build, the DEBUG flag is not set. You can also use different files as your Info.plist depending on build type. There will probably be situations where you want an Xcode debug build with a production JS bundle or vice versa. In that case you need to touch code.
Building ios apps from command line can be a bit tricky. The problems you're describing are not specific to react-native but the Xcode build system. If you haven't already, check out fastlane especially the gym command. It is much simpler than using xcodebuild directly.
But you still have to define your schemes.
I just started porting an Android app to iOS, and am hitting a major roadblock that I can't figure out despite scouring many similar questions.
I am attempting to follow the pattern implemented in the CastVideos sample where the GoogleCast API is encapsulated in a singleton class which I've called CastManager. To use my singleton class, I #import "CastManager.h" in AppDelegate.m. Then in CastManager.h, I #import <GoogleCast/GoogleCast.h> so that I can use classes and protocols from it as part of CastManager's public interface. However, because I'm importing CastManager.h in both CastManager.m and AppDelegate.m, the linker is finding duplicate symbols from the GoogleCast framework.
This is my CastManager.h:
#import <GoogleCast/GoogleCast.h>
#import <Foundation/Foundation.h>
#interface CastManager : NSObject
#property(nonatomic, strong) GCKDeviceScanner *deviceScanner;
+ (instancetype)sharedCastManager;
#end
And corresponding CastManager.m:
#import "CastManager.h"
#implementation CastManager
+ (instancetype)sharedCastManager {
NSLog(#"sharedCastManager");
static CastManager *singleton = nil;
static dispatch_once_t onceToken;
dispatch_once(&onceToken, ^{
singleton = [[self alloc] init];
});
return singleton;
}
- (instancetype)init {
NSLog(#"init()");
if (self = [super init]) {
self.deviceScanner = [[GCKDeviceScanner alloc] init];
}
return self;
}
#end
And this is the main part of my AppDelegate.m:
#import "AppDelegate.h"
#import "CastManager.h"
#implementation AppDelegate
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
CastManager *castManager = [CastManager sharedCastManager];
return YES;
}
However, this results in the following error from the linker when attempting to build the project:
duplicate symbol _kGCKDeviceCapabilityVideoOut in:
/Users/nate/Library/Developer/Xcode/DerivedData/MyCastApp-ezrgxdnlvywpanerezulnarzknno/Build/Intermediates/MyCastApp.build/Debug-iphonesimulator/MyCastApp.build/Objects-normal/x86_64/AppDelegate.o
/Users/nate/Library/Developer/Xcode/DerivedData/MyCastApp-ezrgxdnlvywpanerezulnarzknno/Build/Intermediates/MyCastApp.build/Debug-iphonesimulator/MyCastApp.build/Objects-normal/x86_64/CastManager.o
... many similar errors ommitted for brevity ...
duplicate symbol _kGCKDeviceCapabilityAudioIn in:
/Users/nate/Library/Developer/Xcode/DerivedData/MyCastApp-ezrgxdnlvywpanerezulnarzknno/Build/Intermediates/MyCastApp.build/Debug-iphonesimulator/MyCastApp.build/Objects-normal/x86_64/AppDelegate.o
/Users/nate/Projects/MyCastApp/GoogleCast.framework/GoogleCast(GCKDevice.o)
ld: 8 duplicate symbols for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)
As far as I can tell, this exactly copies the pattern as defined in the CastVideos sample, but the sample compiles fine, and mine doesn't, and I've scoured through both projects trying to find what is different, but I just don't see it. Further, I don't see anything really wrong with doing this, and would expect it to work fine. I can't think of any other way to do it, really.
Here are the relevant files from the CastVideos sample for comparison:
ChromecastDeviceController.h
ChromecastDeviceController.m
AppDelegate.m
Other questions point to solutions that don't apply or don't fix it:
I'm not importing a .m file on accident.
I don't have duplicate references to any files in the project.
The "Compile Sources" section of the "Build Phases" project setting doesn't include any duplicates.
I've added the '-ObjC' linker flag as described by the GoogleCast API docs, though it has the same error with or without it.
I've tried deleting the delegate data and doing a clean before building.
This is with Xcode 6.3.1 running on OS X Yosemite 10.10.3 and the GoogleCastSDK-2.6.0 package from the SDK documentation page
I have checked in my sample project with the problem at https://github.com/nshafer/MyCastApp
Any help is greatly appreciated!
Edit: the duplicate is somewhat related, it's definitely about the same symbols, but the answers there didn't help, as I'm not using Object-C++, but rather just Objective-C. I don't have a .mm file, just a .m file.
For me it helped to switch the "No Common Blocks" compiler setting to NO:
It pretty much seems to make sense, the setting is explained here: What is GCC_NO_COMMON_BLOCKS used for?
The linker tells you that you have a variable named kGCKDeviceCapabilityVideoOut in two files, AppDelegate.m and CastManager.m. Since it's not in your source code, it's most likely in the GoogleCast code that you are including.
Either change the GoogleCast.h file, or make sure it is only included in one .m file. Including it from CastManager.h means it is indirectly included in every file that includes CastManager.h, so I would avoid that and only include it from CastManager.m. You'll probably have to add
#class GCKDeviceScanner;
in your CastManager.h file.
I found another fix, which is to edit GCKDevice.h in the GoogleCast.framework/Headers folder. Change the 4 constants from GCK_EXPORT to GCK_EXTERN near the top of the file.
/** Device capability flag for video out. */
GCK_EXTERN const NSInteger kGCKDeviceCapabilityVideoOut;
/** Device capability flag for video in. */
GCK_EXTERN const NSInteger kGCKDeviceCapabilityVideoIn;
/** Device capability flag for audio out. */
GCK_EXTERN const NSInteger kGCKDeviceCapabilityAudioOut;
/** Device capability flag for audio in. */
GCK_EXTERN const NSInteger kGCKDeviceCapabilityAudioIn;
I detailed this in a bug report I filed with Google's issue tracker, but it was marked as a duplicate of another somewhat related issue. Either way, it will perhaps get fixed in the next version. Until then, I would suggest going with changing the "No Common Blocks" setting as detailed in Joobik'com's answer, as that doesn't involve changing the 3rd party code.
I'm trying to add a Today Extension to a project I've been working on for quite some time. In fact the app is in the AppStore already and I'm looking to enhance it with a Today Extension.
The problem is that the Extension won't launch at all. Not on the device nor on the simulator.
EDIT: just skip the next sections and read on at the last EDIT as I think I found the problem. I just not sure how to fix it.
I've done a test project following a tutorial and it works just fine. The environment seem(!) to be identical. Xcode 6.1.1, iOS 8.1 on the device and simulator.
My project is Objective-C based. For the Extension I’ve tried both Objective-C and Swift targets. On both occasions all three (four with obj-C) files were created as expected (storyboard, viewController and PLIST).
Having done nothing more (as with the example project) I'm trying to launch the widget with the widget scheme selected. With the test projects the widget would launch while it won't with the actual project.
I put a println()/NSLog in the viewDidLoad of the widgets viewController to see if anything happens but nothing.
Happy to provide code or settings but at this pointing time I've no idea where to start.
I just realised that with the test project the today view would launch/appear automatically when the widget gets run from Xcode. With my actual project I'm just getting the HomeScreen and have to pull down the Today view myself. So, really nothing at all happens regarding the widget while everything looks identical compared to the test project.
Any help is appreciated.
EDIT: Here is something I came across which might constitute the problem. The widget never gets launched really and gets stuck at ´Waiting to Attach´ in Xcode's Debug navigator. While other seemed to have had the same problem all potential solutions I found so far did't work for me.
EDIT: I noticed that when I add a Today widget as a target the binary is named .app. All test projects I did the binary gets created as .appex. All the information on the web suggests that it should be named .appex really. Where does this come from and how do I alter this?
I had the same problem.
The following steps helped:
selected target Today Extortion -> Build Settings -> line Wrapper Extension add (change) value to appex
See:
Same problem happened today when I created a Notification Content extension in an old project.(2016, Xcode8 iOS10)
Finally I found the cause:
"Wrapper Extension" in Build Settings of the project was “app”, and when the new target of extension was created, "Wrapper Extension” inherited from the project settings as “app”.
Clearing the project setting before adding an extention target will make Xcode creat an extention as “appex” automatically.
I am herewith sharing the step and source code.
Step 1:- App extension must have a containing app - you can't just create an app extension to be downloaded from the store, first create a regular app to contain the app extension. For the sake of this demonstration just create a new single view project and leave it untouched. Go to File-> New-> Project and select Single view application under iOS -> Applications call it 'ExtendableApp'.
Step 2:- If you want to create your custom experience simply set your ExtensionViewController to inherit from UIViewController, Once your extension is activated all the regular viewDidLoad, viewDidAppear, etc will be called.
Step 3:- In your controller storyboard create outlets for button, I am herewith describing 3 buttons.
Step 4:- In ExtensionViewController.m write
- (void)viewDidLoad {
[super viewDidLoad];
self.preferredContentSize = CGSizeMake(self.view.frame.size.width, 60.0f);
// Do any additional setup after loading the view from its nib.
}
Step 5:- I am assuming that you have set the outlets and IB Action of your buttons in extension storyboard
- (IBAction) mActionButtonTapped :(UIButton *) sender {
switch (sender.tag) {
case 0: {
NSURL *url = [NSURL URLWithString:#"IDENTIFIER_1://"];
[self.extensionContext openURL:url completionHandler:nil];
}
break;
case 1: {
NSURL *url = [NSURL URLWithString:#"IDENTIFIER_2://"];
[self.extensionContext openURL:url completionHandler:nil];
}
break;
case 2: {
NSURL *url = [NSURL URLWithString:#"IDENTIFIER_3://"];
[self.extensionContext openURL:url completionHandler:nil];
}
break;
default:
break;
}
}
Step 6:- In your project write these code in appDelete.m
- (BOOL)application:(UIApplication *)application handleOpenURL:(NSURL *)url {
[self appExtensionCallBack:url.absoluteString];
return YES;
}
- (void) appExtensionCallBack :(NSString *)urlString {
if ([urlString isEqualToString:#"IDENTIFIER_1://"]) {
[self.tabBarController setSelectedIndex:0];
} else if ([urlString isEqualToString:#"IDENTIFIER_2://"]) {
[self.tabBarController setSelectedIndex:1];
} else if ([urlString isEqualToString:#"IDENTIFIER_3://"]) {
[self.tabBarController setSelectedIndex:2];
}
}
Note :- I am using Tab Bar Controller in my project, You can give own respected controller.
- (void) moveToControllerScene {
UIStoryboard *storyboard = [UIStoryboard storyboardWithName:STORY_BOARD_IDENTIFIER bundle:nil];
YOUR_CONTROLLER_OBJECT *obj = [storyboard instantiateViewControllerWithIdentifier:#"YOUR_CONTROLLER_OBJECT"];
[navController pushViewController:obj animated:YES];
}
Step 7:- For testing the Extension in real device you have to make a separate App ID and Provisioning profile. Delete appropriate provisioning profile in extension and ur project.
Okay first post ever on any forum but i'll do my best to describe my problem. I'm a beginner at Xcode so i'm sorta expecting an easy solution, but i just can't seem to figure this one out.
In Xcode i am trying to create an Admob singleton to get admob in all my view controllers. Admob will back up iAd, which will be showed should Ad fail.
I followed this guide: http://googleadsdeveloper.blogspot.dk/2012/04/creating-gadbannerview-singleton-in.html
I created a GADMasterViewController .m and .h file
The GADMasterViewController.h looks like this
#import "GADBannerView.h"
#interface GADMasterViewController : UIViewController <GADBannerViewDelegate> {
GADBannerView *adbanner_;
BOOL isLoaded_;
id currentDelegate_;
}
#end
and the GADMasterViewController.m file looks exactly as the one in the guide except i put #import "GADMasterViewController.h" at the top.
Then in my viewController.m where i want the ad to show i put
- (void)bannerView:(GADBannerView *)banner didFailToReceiveAdWithError:(NSError *)error{
_UIiAd.hidden = YES;
shared = [GADMasterViewController singleton];
[shared resetAdview:self]
}
However in viewController.m i get the following errors:
https://dl.dropboxusercontent.com/u/63928888/Sk%C3%A6rmbillede%202014-09-15%20kl.%2000.17.02.png
Basically it doesn't recognize the returned "shared" err singleton (or whatever "shared" is) from GADMasterViewController.m
How do i "get" "shared" so my viewController doesn't produce these errors?
You are using shared, but you haven't defined it as a variable (local or otherwise).
So, change
shared = [GADMasterViewController singleton];
[shared resetAdview:self]
to either
GADMasterViewController *shared = [GADMasterViewController singleton];
[shared resetAdview:self];
or
[[GADMasterViewController singleton] resetAdview:self];
so that you are defining the variable, or so that you don't need a variable.
I have gone through the ADLivelyTableView demo project but have not been able to import the ADLivelyTableView h and m files into my project successfully. It appears that the main issue is to do with ARC. I have experimented by converting the demo project into arc, specifically but converting just the LDMasterView.m file, and this simply removes all references to releasing objects, and so after this conversion, the use ARC option under build settings is now ON and the app works. So i figured that the ADLivelyTableView .m and .h files dont need converting, but when these are imported into my project, i get all sorts of ARC errors for these two blocks of code:
if (block != _transformBlock) {
Block_release(_transformBlock);
_transformBlock = Block_copy(block);
}
}
and
#implementation ADLivelyTableView
- (void)dealloc {
Block_release(_transformBlock);
[super dealloc];
}
I dont get why these errors didnt show when turning on ARC in the demo project. id prefer finding a solution rather than trying to import my entire application to the demo project instead! The errors are as follows:
ARC Casting Rules: Cast of block pointer type 'ADLivelyTransform (aka NSTimeINterval (^)CALayer*_strong, float) to C pointer type 'const void *' required a bridged cast.
ARC Casting Rules: Cast of C Pointer ....(Same as above)
Also, once this issue is resolved, it is supposed to be as simple as just importing the ADLivelyTableView .h and .m files and then adding the line :
ADLivelyTableView * livelyTableView = (ADLivelyTableView *)self.tableView;
livelyTableView.initialCellTransformBlock = ADLivelyTransformFan;
into my viewDidLoad section? or is that bit supposed to be edited for my specific table?
Thanks for your help,
Regards,
Rami
You can modify the Compiler Flags for ADLivelyTableView.m.
Kindly try to add -fno-objc-arc.