I am getting an unusual error when I try building or running my iphone game.
//GameScene.mm
- (void) onExit
{
if(!([SimpleBox2dScrollerAppDelegate get].paused)) //error comes here
{
[SimpleBox2dScrollerAppDelegate get].paused = YES;
[super onExit];
}
}
// SimpleBox2dScrollerAppDelegate.mm
+(SimpleBox2dScrollerAppDelegate *) get {
return (SimpleBox2dScrollerAppDelegate *) [[UIApplication sharedApplication] delegate];
}
What might be the reason?
It is nothing , probably you get a number of errors after that you did changes and get this kind of error.
follow thes steps it may be solve your problem.
-Delete the app from simulator.
-clean the all target.
-empty cache.
-delete build
Now try to run.
Related
I am getting REALLY frustrated!!
I have tried every living possibility to get rid of the UIStatusBar at the top of my app...
I have tried:
Setting Status Bar to "None" in IB
Running [[UIApplication sharedApplication] setStatusBarHidden:YES]; on application launch AND in each scene.
Going to the .plist and changing the value for Status Bar Hidden at Startup: YES
Setting that same value on the home page for the target
Setting - (BOOL)prefersStatusBarHidden
{
return YES;
} in the app delegate
Literally none of this works... It still shows up on all of my views, and it is SUPER frustrating
Thanks again :)
Side note: I'm in xcode 5, developer beta iOS 7 beta 6, but this also happens on my old ios6 and xcode 4 apps
Please try this
//viewDidload
if ([self respondsToSelector:#selector(setNeedsStatusBarAppearanceUpdate)]) {
// iOS 7
[self prefersStatusBarHidden];
[self performSelector:#selector(setNeedsStatusBarAppearanceUpdate)];
} else {
// iOS 6
[[UIApplication sharedApplication] setStatusBarHidden:YES withAnimation:UIStatusBarAnimationSlide];
}
// Add this Method
- (BOOL)prefersStatusBarHidden
{
return YES;
}
This code has been taken from this link
What I usually do is add two key-value properties to the Info.plist file.
The properties source code is:
You need to add a method to the view controller, and not to the app delegate as you write.
- (BOOL)prefersStatusBarHidden
{
return YES;
}
As something occured to me!!
for anyone else ,,
Make sure you are modifying the info.plist in the right *TARGET* :/
plus the accepted answer.
i have an error when scheduling a method. (to display how many star you get according to your score. i have addStar0 addStar1 addStar2 addStar3 methods)
[self schedule:#selector(addStar0) interval:0.2f];
and the methods are:
-(void) addstar0 {
[self unschedule:_cmd];
if (star > starProgress) {
starProgress++;
[self schedule:#selector(addStar1) interval:0.5f];
}
else {
[self schedule:#selector(displayResult) interval:0.5f];
}
}
error message:
Signature not found for selector - does it have the following form? -(void) name: (ccTime) dt
I've tried changing all my methods into addStar1: (ccTime) delta and schedule: #selector(addStar:) interval: 0.2f, but still the same. (actually i've used both ways to schedule( with/without parameter), and both of them worked well in my last project. )
also, one weird thing: sometimes i can't use [self schedule: something], but [CCScheduler sharedScheduler] schedule: something] works fine. I guess it may be project settings or so?
Please answer it with code. thank you.
You are using 'addStar0' for selector
[self schedule:#selector(addStar0) interval:0.2f];
then
-(void) addstar0 {
should be
-(void) addStar0 {
I think your error is actually on [self unschedule:_cmd];
Where is _cmd defined? Try commenting out that line and running it again.
put [self unschedule:_cmd]; after the else statement
Apologies ahead of time if this is a completely off-the-mark question, or if I'm not including enough information - I'm very new to iOS development (and Objective-C), and have a habit of jumping into the deep end...
I'm having trouble understanding the "callDelegate" code in GameCenterManager.m that's in the GKTapper Sample Code and also provided in this tuts+ tutorial: http://mobile.tutsplus.com/tutorials/iphone/ios-sdk-game-center-achievements-and-leaderboards-part-2/
This is the code:
- (void) callDelegate: (SEL) selector withArg: (id) arg error: (NSError*) err
{
assert([NSThread isMainThread]);
if([delegate respondsToSelector: selector])
{
if(arg != NULL)
{
[delegate performSelector: selector withObject: arg withObject: err];
}
else
{
[delegate performSelector: selector withObject: err];
}
}
else
{
NSLog(#"Missed Method");
}
}
My app always logs that "Missed Method" line, but I'm not sure what this callDelegate code is actually doing (so I can't fix it). I figure the best way forward is to learn what this is actually doing, and get better output than 'Missed Method'...
One caveat is that my app is currently using Game Center in sandbox mode, since I'm still developing it. This 'Missed Method' line might be expected in this situation - I'm not sure of that, either.
Would anybody be able to translate this code into paragraph form? I'm particularly unsure about the '[delegate respondsToSelector: selector]' piece.
Alternatively, would anybody be able to rewrite the NSLog line so that it outputs more/relevant detail about the problem? I tried this in the hopes of seeing which selector is not going through 'respondsToSelector' properly, but it didn't seem to work:
NSLog(#"Missed Method, %#", selector);
T'he best way to see exactly what is happening is putting a breakpoint at the beginning of callDelegate and then debugging your program, instead of simply running it. You can debug by pressing cmd-y.
Doing like this, each time your program enters the callDelegate function, it stops and the debugger window pops up. There you will be able to inspect where the call came from and what the parameters are.
As to a plain description of this function I would say that it is an helper function that wraps a call to a selector by preceding it with a check of existence of that selector. Instead of checking each time and the performing the selector, you call the helper function that will do both things for you.
So, the reason you always see the log line is that the function you would like to call is not there. By using the debugger you will be able to see which function it is, which class is missing it, and who attempted the operation.
Some comments requested further details about what I commented out to resolve this issue. I didn't think this was good to add as an edit to the question, since it specifically goes over the resolution. It's been a while since I've worked on this project, so it's not all at the top of my head & I'm not sure I've done everything correctly ... I'll do my best to explain it, though.
In the file GameCenterManager.h, it looks like authenticateLocalUser is being initialized:
- (void) authenticateLocalUser;
In the file App_NameViewController.m, viewDidLoad is checking to see if Game Center is available:
self.currentLeaderBoard = kLeaderboardID;
if ([GameCenterManager isGameCenterAvailable]) {
self.gameCenterManager = [[[GameCenterManager alloc] init] autorelease];
[self.gameCenterManager setDelegate:self];
[self.gameCenterManager authenticateLocalUser];
} else {
// The current device does not support Game Center.
}
In the file GameCenterManager.m
- (void) authenticateLocalUser
{
if([GKLocalPlayer localPlayer].authenticated == NO)
{
[[GKLocalPlayer localPlayer] authenticateWithCompletionHandler:^(NSError *error)
{
// report any unreported scores or achievements
[self retrieveScoresFromDevice];
[self retrieveAchievementsFromDevice];
//[self callDelegateOnMainThread: #selector(processGameCenterAuth:) withArg: NULL error: error];
}];
}
}
The line that I commented out, which moved me past the Missed Method error, was:
[self callDelegateOnMainThread: #selector(processGameCenterAuth:) withArg: NULL error: error];
I hope this helps!
Add this code to Game_CenterViewController.m you will see the error
- (void)processGameCenterAuth:(NSError *)error{
NSLog(#"error %#", error);
}
Does Apple not allow developers to add an icon into a status bar?
I followed code from a book. The code is simple:
#interface UIApplication (extended)
- (void) addStatusBarImageNamed:(NSString *)aName;
- (void) removeStatusBarImageNamed:(NSString *)aName;
#end
- (void)performAction{
if (xxx) {
[[UIApplication sharedApplication]addStatusBarImageNamed:#"Default_EN.png"];
}
else {
[[UIApplication sharedApplication]addStatusBarImageNamed:#"Default_EC.png"];
}
}
But it gives the following feedback :
-addStatusBarImageNamed: is deprecated. Doing nothing.
What can I do?
To my best knowledge, this isn't permitted within the SDK, but there could be the possibilities that they could have some private API to do so but so far they haven't exposed those, I think you are'nt able to add icon in status bar. If someone know please correct me .
In Classes/YourViewController.m, the addStatusBarImageNamed:removeOnExit: method needs to be overwritten with this.
- (void) addStatusBarImageNamed:(NSString*)image removeOnExit: (BOOL) remove {
if(_statusbarimage!=nil && _responds) {
if ([[[NSUserDefaults standardUserDefaults] objectForKey:#"statusBarEnabled"] integerValue] == 1)
[self removeStatusBarImageNamed:_statusbarimage];
statusbarimage=image;
}
if (_responds) {
if ([[[NSUserDefaults standardUserDefaults] objectForKey:#"statusBarEnabled"] integerValue] == 1)
[super addStatusBarImageNamed:image removeOnExit: remove];
}
}
See if it works fine.
Currently, my Iphone application is not released yet. When I worked with the simulator/device and I modify my application to add more cache into the encodeWithCode: and initWithCoder: . The problem is that when the application is loaded, I tried to use some of the encoded object which is not existing before. For example:
In the previous application version (e.g 1.2), I have this encode:
- (void)encodeWithCoder:(NSCoder*)coder {
[coder encodeObject:myArray forKey:NCITEMTABLE_ARCHIVE_HOME_ITEMS_KEY];
}
But with new version (e.g 1.3), I use this init:
- (id)initWithCoder:(NSCoder*)coder {
if (self = [super initWithCoder:coder]) {
myArray = [[coder decodeObjectForKey:NCITEMTABLE_ARCHIVE_HOME_ITEMS_KEY] retain];
myArray2 = [[coder decodeObjectForKey:NCITEMTABLE_ARCHIVE_HOME_ITEMS_2_KEY] retain];
}
return self;
}
and then the application will crash because it cannot find myArray2.
In the simulator or testing, I can just delete the old version and install from fresh. However, I am afraid that when it is released, I cannot tell my user to delete the old app and install the new fresh one. Have anyone experienced about this problem?
In your initWithCoder you should be able to just call containsValueForKey to see if the key exists before trying to call decodeObjectForKey
I tried to use try catch to get the exception. It may not be the best answer but it works now
. The problem is that it may have low performance when it has to do try catch exception, which is not recommended by Apple
if (archive) {
#try {
[self unarchiveInitializingWithData:archive];
}
#catch (NSException * e) {
NCLog (#"Cannot unarchive");
[self normalInitializing];
}
} else {
NCLog (#"Normal init");
// normal init
[self normalInitializing];
}