Problem of UIWebView in cocos2d, view appearing in the next scene also.

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Problem of UIWebView in cocos2d, view appearing in the next scene also.

(8 posts) (4 voices)

Started 1 year ago by srikanth
Latest reply from edge17

Tags:

srikanth
Member

hi, I am using UIWebView to display the scrolling text in a scene in cocos2d. Some times the text is appearing in the next scene also. And it is not disappeared in any next scene. When I restart the game it is again fine. I released it and removed it from superview. But the problem occurs only some times . I could not get where I am wrong in my program. Can you suggest me.

-(id)init
{
   if((self = [super init]))
  {
	self.isTouchEnabled  = YES;	

//I added the button here. When we touch it takes to next scene.
	CCMenuItem *buttonItem = [CCMenuItemImage itemFromNormalImage:@"buttonA.png" selectedImage:@"buttonB.png" target:self selector:@selector(buttonPressed:)];
	CCMenu *buttonMenu = [CCMenu menuWithItems: buttonItem, nil] ;
	[buttonMenu alignItemsVertically];
	buttonMenu.position = ccp(windowSize.width/2 + 200, windowSize.height/2-60);
	[self addChild:buttonMenu z:1];

	self.myUIWebView = [[UIWebView alloc]initWithFrame:CGRectMake(10, 10, 250, 250)];
	[self.myUIWebView loadData:contentData MIMEType:@"text/html" textEncodingName:@"UTF-8" baseURL:[ NSURL URLWithString:@"" ]];
	[self.myUIWebView setBackgroundColor:[UIColor clearColor]];
	[self.myUIWebView setOpaque:NO];
	self.myUIWebView.transform = CGAffineTransformMakeRotation(CC_DEGREES_TO_RADIANS( 90.0f ));
	[[[CCDirector sharedDirector] openGLView] addSubview:self.myUIWebView];
  }
  return self;
}
-(void)buttonPressed:(id)sender
{	[self.myUIWebView removeFromSuperview];

	CCScene *Scene = [CCScene node];
	CCLayer *Layer = [ChoicesScreen node];
	[Scene addChild: Layer];
	[[CCFastDirector sharedDirector] replaceScene: Scene];
}

-(void)dealloc
{
	[self.myUIWebView release];

	[super dealloc];
}

Thank you.

Posted 1 year ago #

robodude666
Member

Yup. You added the web view as a subview of the openGL view. Changing the scene only tells Cocos2D what to render into the openGL view. The Webview is unaffected by cocos2d.

If you want the webview to go away when you replace the scene, simply manually remove it from its subview in the buttonpressed selector.

Posted 1 year ago #

srikanth
Member

@robodude666. I did that in the buttonPressed method. Is is not correct way to remove the view manually ?
I used the following also. But, have same problem. If you have any good solution please share with me.

-(void)buttonPressed:(id)sender
{	//[self.myUIWebView removeFromSuperview];

       NSArray *subviews = [[[CCDirector sharedDirector]openGLView] subviews];
	for (id sv in subviews)
	{
		[((UIView *)sv) removeFromSuperview];
		[sv release];
	}
	CCScene *Scene = [CCScene node];
	CCLayer *Layer = [ChoicesScreen node];
	[Scene addChild: Layer];
	[[CCFastDirector sharedDirector] replaceScene: Scene];
}

Thank you.

Posted 1 year ago #

robodude666
Member

Oh, didn't notice that bit -- sorry. Not too sure then.

EDIT: Try possibly retaining it. Alternatively to removing it you can try setting it to hidden if you plan to use it again.

Posted 1 year ago #
srikanth
Member

@robodude666, No, I do not use it again. so, I need it to remove. I can't use hidden.

Posted 1 year ago #

Verisutha
Member

I am using a UIWebview in my code as well. I actually create everything dynamically within a CCLayer. Then in the CCLayer I release the dynamically generated UIWebview:

Here is a cut from the code, you'd have to adapt it to a stand alone, since it's mainly designed to function within our project: (It is really trimmed down to try and keep it simple, so it may not function perfectly, I am assuming you have some basic knowledge and can adapt it to your code)

To layer creating it:

webBuild = [BuildMenu openWebPage:CGRectMake(0,120,320,360)];
	[self addChild:webBuild z:21];

To remove it from the layer:

[self removeChild:webBuild cleanup:YES];

This is the code within the web object itself... The
The code within the web object:
buildmenu.h

#import <Foundation/Foundation.h>
#import "cocos2d.h"

@interface BuildMenu : CCLayer <UIWebViewDelegate>{
	UIWebView*  webDisplay;
}

@property (nonatomic, retain) IBOutlet UIWebView *webDisplay;

+(id)openWebPage:(CGRect)_framePos;

-(void)webHTMLDisplay:(CGRect)_framePos;

@end

buildmenu.m

+(id)openWebPage:(CGRect)_framePos {
	// 'layer' is an autorelease object.
	BuildMenu *uiWeb = [BuildMenu node];
	[uiWeb webHTMLDisplay:_framePos];
	return uiWeb;
}

// on "init" you need to initialize your instance
-(id) init
{
	// always call "super" init
	// Apple recommends to re-assign "self" with the "super" return value
	if( (self=[super init] )) {
		//CGSize winSize = [[CCDirector sharedDirector] winSize];
	}
	return self;
}

// on "dealloc" you need to release all your retained objects
- (void) dealloc
{
	// in case you have something to dealloc, do it in this method
	// in this particular example nothing needs to be released.
	// cocos2d will automatically release all the children (Label)

	// don't forget to call "super dealloc"
	[super dealloc];
}

- (void)onEnter
{
	[super onEnter];
}

- (void)onExit
{
	[webDisplay removeFromSuperview];
	[super onExit];
}	

-(void)webHTMLDisplay:(CGRect)_framePos {

	// Create and add the webDisplay to the Director View
	webDisplay = [[UIWebView alloc] initWithFrame: _framePos];
	webDisplay.delegate = self;
	[[[CCDirector sharedDirector] openGLView] addSubview: webDisplay];

	webDisplay.backgroundColor = [UIColor clearColor];
	webDisplay.opaque = NO;
	[webDisplay loadHTMLString:htmlString baseURL:baseURL];

}

This way the view is actually encapsulated within a layer, and I can use all of the layer management to handle it.

Posted 1 year ago #

edge17
Member

I'm not seeing my UIWebViewDelegate functions being fired when I add a UIWebView to the openGLView and load up a page. Is there any reason they might not fire?

header:

#import <Foundation/Foundation.h>
#import "cocos2d.h"

@interface PageEnd : CCLayer <UIWebViewDelegate>{
	UIWebView *webView;
}

@end

body:

@implementation PageEnd

- (id)init{

	if( (self=[super init])) {
		UIWindow *w = [[UIApplication sharedApplication] keyWindow];
		UIView *v = [[CCDirector sharedDirector] openGLView];

		CCSprite *footer = (CCSprite*)[self getChildByTag:FOOTER];
		footer.visible = NO;

		UIWebView *wv = [v viewWithTag:PENDWEBVIEW];

		if (wv){
			webView = wv;
			webView.frame = CGRectMake(w.frame.origin.x, w.frame.origin.y, w.frame.size.width, w.frame.size.height);
		}
		else{
			webView = [[UIWebView alloc] init];
			NSString *url_str = @"http://www.cnn.com/";
			[webView loadRequest:[NSURLRequest requestWithURL:[NSURL URLWithString:url_str]]];
			webView.frame = CGRectMake(w.frame.origin.x, w.frame.origin.y, w.frame.size.width, w.frame.size.height-120);
			webView.tag = PENDWEBVIEW;
			[v addSubview:webView];
		}

		NSLog(@"subs: %@", [w subviews]);

	}

	return self;
}

/* web view delegate */

- (void)webViewDidStartLoad:(UIWebView *)webView{
	NSLog(@"start!!!");
}

- (void)webViewDidFinishLoad:(UIWebView *)webView{
	NSLog(@"end!!!");
}

- (void)webView:(UIWebView *)wv didFailLoadWithError:(NSError *)error{
	UIWindow *w = [[UIApplication sharedApplication] keyWindow];
	UIView *v = [[CCDirector sharedDirector] openGLView];

	NSLog(@"inhere ");
	if (error){
		NSLog(@"error, page didn't load ");
	}
}

- (void) dealloc{
	// removeFromSuperview.....
	[webView removeFromSuperview];
	[webView release];
	[super dealloc];
}

@end

Problem of UIWebView in cocos2d, view appearing in the next scene also.

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