I have written a game in Xcode in the myscene.m file. I have a problem however. When ever the game loads for testing or is opened the game automatically starts. Is there any code that I can implement to only start the game when the screen in touched?
Thanks in advance.
To execute a method when the screen is touched:
-(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{
[self startMyGame];
}
-(void)startMyGame
{
// add your game start code here...
}
You should really think about your code logic. Usually a menu screen is run before the game is actually started. Menu options such as "start game" give the user a clear choice as to start the game when they are ready. Food for thought...
Related
Hello I've made an iOS game named 'Racing Horses' and published it to App Store. It was fine with playing on iOS 8.x.x, but after I installed iOS 9 Beta 3, in the same game (same codes), iPhone cannot recognize multiple touches. I have to leave my finger to make the next touch. But it was not like this, I could make a new tap even if I still hold my previous tap. What is the problem, what should I do?
I had the same problem on a game launched this summer.
I had to explicitly enable multiple touch in the SKScene:
-(void)didMoveToView:(SKView *)view {
self.view.multipleTouchEnabled = YES;
}
Here's more detail -
The game uses sub-classes of SKSpriteNode.
They test for number of touches depending on the the sprite.
In the sub-class:
-(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{
NSLog(#"TapCount = %lu", (unsigned long)touches.count);
if (touches.count == 2) {
// do something
}
}
It looks like as of ios 9 multitouch has to be explicitly enabled. I don't think this used to be the case. I now have this issue on all my spritekit apps. Just adding self.view.multipleTouchEnabled = YES; in viewDidLoad, fixes it for me.
Just a simple mistake, I've enabled multitouch at interface builder, problem solved. But I don't know how it turned off by itself :)
I'm working on an iPhone game using cocos2d and I'm new to Objective C and Cocos2d so I'm sorry if this is a really beginner question. I've done a lot of searching and I can't seem to find a solution for this problem. I've found that cocos2d will not call the dealloc function, release a scene, or a layer unless I put -(void) onExit{self.isTouchEnabled = NO;} at the end of the .m file. The problem is that in the next scene the game crashes when the screen is touched, even if I put self.isTouchEnabled = YES; in the init method, onEntermethod, or anywhere else within the second scene.
When the game crashes (gbd) points to:
- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{
if( dispatchEvents )
[self touches:touches withEvent:event withTouchType:kCCTouchBegan];
}
as the source of the problem stating "EXC_BAD_ACCESS"
Please help!! Thank you!!
I am new to iPhone as well:-) But for my experiences, the reason you get "EXC_BAD_ACCESS" is not because of your code here. it should be "release" problem. i guess you release a released object...
you can try to use Xcode's Zombies instruments to detect where you get this problem. There are heaps of tutorials about Xcode Zombies online, just google it if you want.
good luck:-)
I'm currently developing a game on iPhone using the Cocos2D API. It's going well. One issue I'm having though is that I have to recompile each time I want to change my variables. This is very tedious, especially now that I am tweaking gameplay.
Is there any implementation for a sort of developer console screen? What I mean is: I want to have a type of game screen that I load, that contains a list of variables that I register to the game screen(with scroller). And I want to be able to modify these variables on the spot.
I remember there being a presentation on a WWDC event in which they showed such a screen on an ipad. The developer would just press a button and the gamescreen would change to a developer console like screen. I know this presentation had nothing to do with Cocos2D, but still, if this already exists in some shape or form, I would love to re-use this code instead of writing it on my own.
Though if I had to write it on my own, I wouldn't really know where to start. So any help there would be appreciated as well.
Thx!
It was (I believe) Graeme Devine at Apple's WWDC last year who had some suggestions on how to implement such a developer console (check the video on iTunes University). An example called Game Console is included with the example code of WWDC 2010 (232 MB). I've also added a link (57 kb) to GameConsole.zip from DropBox, for convenience.
This is a seriously backdated reply but we implemented a developer console for Mega Run to test out various stages and modify player properties at run time. Implementation was to tap in the top left corner of the screen at any point in the game to bring up the console. From there you could modify to your needs. The skeleton of the implementation was to override EAGLView and handle the touchesBegan touch callback yourself. Here is the implementation...
-(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{
const CGFloat DEV_DASHBOARD_ENABLE_TOUCH_AREA = 20.0f;
for (UITouch* t in touches)
{
CGPoint pt = [t locationInView:self];
if (pt.x < DEV_DASHBOARD_ENABLE_TOUCH_AREA && pt.y < DEV_DASHBOARD_ENABLE_TOUCH_AREA)
{
ToolSelectorContainer* editorViewController = [[ToolSelectorContainer alloc] initWithNibName:#"ToolSelectorContainer" bundle:nil];
if (editorViewController != nil)
{
CCScene* g = [CCDirector sharedDirector].runningScene;
// Pause the game if we're in it playing
//
if ([g isKindOfClass:[Game class]])
[((Game *)g) menuPause];
[[GSGCocos2d sharedInstance].navigationController pushViewController:editorViewController animated:YES];
[editorViewController release];
break;
}
}
}
#endif
[super touchesBegan:touches withEvent:event];
}
ifdef is used to not compile this code for production builds.
It's really strange. I have a blank UIImageView subclass that implements the -touchesEnded:, -touchesMoved, and -touchesBegan: methods. The implementations of these methods are empty. They just do nothing. However, when I run Instruments with "Leaks", and I touch the UIImageView and move my finger outside of that UIImageView while still touching the screen, I get an Memory Leak warning from Instruments.
In my demo app there's no object allocation happening when doing that. The methods are empty. Everything I read in Instruments is related to Foundation and Run Loop stuff. I've checked my class twice and removed any object allocation. It's just an skelleton that only shows an image, but that image is not changed when touching it or moving the finger on the screen. That makes no sense.
Did anyone else encounter problems like this?
UPDATE: I testet a little more around and figured out, that memory leaks happen at any spot on the screen when tapping fast around with 5 fingers. Everything I get from Instruments.app is regarding some run and event loops. It seems like if the device can't handle the touches fast enough and then gets stuck at some point with releasing allocated objects. Please try it out and report here if you can see the same problems.
UPDATE: I've tested now a few Apple example apps as well. When I hack with 3 - 5 fingers around on the screen, like a normal user does (yes, they will do!), then Instrument shows up memory leaks regarding event and run loops. Definitely there's a big in the framework, or in instruments. Tested with iPhone OS 2.2.1.
As reading on an apple forum, it's an unsolved problem in the SDK. It happens when the accelerometer delegate is not nil. Touch event objects are allocated but never freed. The faster the accelerometer delegate is called, the faster those allocation failures happen. Many of the apple sample codes show the same problem. I had the accelerometer turned on.
But I also encountered, that this kind of leaks happen when a touch is tracked from one view onto another. If I keep touching one and the same view and moving my finger on that view without leaving it, I'll not get that problem.
Solutions: Turn accelerometer off (delegate set to nil), reduce the amount of views in your app. I don't know if they fixed that issue in iPhone OS 3.0.
Unfortunately, this will not help:
- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
[[UIAccelerometer sharedAccelerometer] setDelegate:nil]; // because of framework bug
}
- (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event {
[[UIAccelerometer sharedAccelerometer] setDelegate:self]; // because of framework bug
}
- (void)touchesCancelled:(NSSet *)touches withEvent:(UIEvent *)event {
[[UIAccelerometer sharedAccelerometer] setDelegate:self]; // because of framework bug
}
More info at: http://discussions.apple.com/thread.jspa?messageID=9396584t
In my game if I play a particular game for several times, my touches need more time to be detected.
It stores all touches and then applies those touches all at the same time.
Can anybody tell me what's the problem?
In touchesBegan I wrote:
if (CGRectContainsPoint([tapView frame], [touch locationInView:self])
&& tapView.alpha == 1) {
[self callTapCode];
}
This is the code of touchesEnded. If I tapped and release the tapped it shows one tapping event.
- (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event {
if (checkTap == TRUE && tapView.alpha == 1 )
tap_effect_view.alpha = 0;
}
- (void)callTapCode {
// Move player code by 6 pixels
// not possible to write all code
}
In tapView I continuously tap. callTapCode moves the player by six pixels. But after some time my touches detected very slowly, so that the player looks like he's jumping around. I played the game continuously 15 to 16 times.
You might work through this tutorial to learn how to use the Leaks Instrument. This is part of the Instruments suite that comes with Xcode, which will, among other things, help you track down memory leaks and general performance issues with your application.
I found the solution to my problem. In my game I had enabled the tapView.multipleTouchEnabled = TRUE
tapView is the view where I was continuously tapping.
When I make it FALSE it works.
i.e.
tapView.multipleTouchEnabled = FALSE;
I exactly dont know how. But it works.
Thanks for the replies.
Try to look for any memory leaks. Maybe the iPhone has to use virtual memory a lot.