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• How can I launch app store from my application

  - by Tankista

  Im trying to implement button which opens app store application from my app. I use this simple line of code, which opens safari but not app store application. [[UIApplication sharedApplication] openURL:[NSURL URLWithString: @"http://itunes.apple.com/sk/app/tweetie-2/id333903271?mt=8"]]; I dont know whats wrong, is the URL format correct? I was following this document. All related questions in stackoverflow are outofdate I suppose.

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• iPhone image app not releasing memory as in instruments using imageNamed

  - by Tankista

  hi, im building iPhone app that downloads images (UIImageView) from internet and adding them to UIScrollView. This scroll view could contain 20 or more UIImageViews. Iam adding UIImages to UIImageView like this: UIImageView *newView = [[UIImageView alloc] initWithImage: image]; Then I just scroll these images like in photo app. Problem is, when I put just 3 UIImageViews in UIScrollView everything works fine, but when I put more images, more memory is used, so that app can crash after 15 or more images. I can understand it that more images alloc more memory, but in Instruments i get allocated max 2-3 MB, but in device memory raises until it crashes. When I use simulator for OS 3.0 i can see memory rising like on device. On higher versions I dont see this memory raise, why is that?

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• iphone's nsxmlparser parsing RSS causes encoding problems

  - by Tankista

  Hi, Im working on simle RSS reader. This reader loads data from internet via this code: NSXMLParser *rss = [[NSXMLParser alloc] initWithURL:[NSURL URLWithString:@"http://twitter.com/statuses/user_timeline/50405236.rss"]]; My problem is with encoding. RSS 2.0 file is supposed to be UTF8 encoded according to encoding attribute in XML file. <?xml version="1.0" encoding="utf-8"?> So when I download URLs content I get text truncated after first occurance of char with diacritics, example: l š c t ž ý á í é, etc. I tried to solve the problem by downloading URL as UTF8 string, I used this code: NSString *rssXmlString = [NSString stringWithContentsOfURL: [NSURL URLWithString: @"http://www.macblog.sk/rss.xml"] encoding:NSUTF8StringEncoding error: nil]; NSData *rssXmlData = [rssXmlString dataUsingEncoding: NSUTF8StringEncoding]; Did not help. Thanx for your responses.

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• How to remove subviews to release more memory

  - by Tankista

  I have UIScrollView with number of subviews. Each subview is custom UIButton with UIImage. When I load more and more subviews, more and more memory is used. But I remove invisible subviews by removeFromSuperView method. Subviews are removed and stay invisible, but Im afraid that no memory is released. UIImage is image downloaded from internet. Thanx for help.

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