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• Objective C HTML escape/unescape

  - by Squeegy

  Wondering if there is an easy way to do a simple HTML escape/unescape in Objective C. What I want is something like this psuedo code: NSString *string = @"&lt;span&gt;Foo&lt;/span&gt;"; [string stringByUnescapingHTML]; Which returns <span>Foo</span> Hopefully unescaping all other HTML entities as well and even ASCII codes like Ӓ and the like. Is there any methods in Cocoa Touch/UIKit to do this?

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• How To Disable Inertia in ScatterView

  - by jack-amble

  Using ScatterView control shipped in Windows Touch WPF. I want to prevent inertia from happening on a scatterview item. But I still want to allow user to move, scale and rotate the item. So I try this... ScatterviewItem svi = new ScatterviewItem(); svi.ManipulationDelta += OnManipulationDelta; ... void OnManipulationDelta(object sender, ManipulationDeltaEventArgs args) { if (args.IsInertial) { args.Complete(); args.Handled = true; } } But the event is never firing. Am I doing something wrong, or is there another way to do this, or is preventing inertia simply not possible with scatterview?

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• moviePlayBackDidFinish: is not called in application.

  - by srikanth rongali

  In my application I have used these notifications when playing a video. But, The problem is the control of the program is not entering in to the first two methods(moviePreLoadDidFinish and moviePlayBackDidFinish). It is entering into last method. So, after the video is played and I pressed Done button in the video, I cannot touch any object in screen. I mean I used play button for video to play in a view. After the video played the play button is deactivated. - (void) moviePreloadDidFinish:(NSNotification*)notification { } // Notification called when the movie finished playing. - (void) moviePlayBackDidFinish:(NSNotification*)notification { } // Notification called when the movie scaling mode has changed. - (void) movieScalingModeDidChange:(NSNotification*)notification { } I could not get where I was wrong ? Thank You.

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• iPhone UIScrollView - How to animate scrolling with steady contents?

  - by timbos

  Hi all, I'm wondering if anyone knows how to prevent the contents of a uiscrollview from moving unsteadily when scrolling manually by setting the content offset. When scrolling by touch the text remains clear and steady. I would like to recreate this by animating with the animated option set to false. I'm using a timer to scroll at a given interval. The text is being drawn to a view in the contents, but it vibrates and it becomes more difficult to read clearly when animating at a greater speed. The speed varies and the scrolling must respond to changes in speed quickly. Here's some code - - (void) scrollIncrAmt:(float) amt { _currentSpeedIncr = amt; NSArray* arr = [SharedTickerInfo sharedTickerInfo].sDataArray; DataObj* tdObj = [arr objectAtIndex:_row]; if ( ![tdObj isDirLeft] ) { amt = -amt; } float scrollTo = self.scrollView.contentOffset.x + amt; [scrollView setContentOffset:CGPointMake(scrollTo, 0.0f) animated:NO]; }

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• How do I size a UITextView to it's content?

  - by drewh

  Is there a good way to adjust the size of a UITextView to conform to it's content? Say for instance I have a UITextView that contains one line of text: "Hello world" I then add another line of text: "Goodbye world" Is there a good way in Cocoa Touch to get the rect that will hold all of the lines in the text view so that I can adjust the parent view accordingly? As another example, look at the Notes field for events in the Calendar application--note how the cell (and the UITextView it contains) expands to hold all lines of text in the notes string.

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• Dialing a command prefix on the iPhone

  - by tewha

  Our application lets users call phone numbers. Users would like to be able to block their caller ID. On other platforms, we let the user specify a custom dialing prefix. For instance, on my cell provider it's #31#. I've tried two approaches so far. First: id url = [NSURL URLWithString: @"tel:#31#0000000"] // produces nil Second: id encoder = ["#31#0000000" stringByAddingPercentEscapesUsingEncoding: NSUTF8StringEncoding]; // produces %2331%230000000 id url = [NSURL URLWithString: [NSString stringWithFormat: @"tel:%@", encoded]]; // produces a valid-looking NSURL which doesn't do anything I'm thinking at this point that I'm just not allowed to dial # and *, even from a Cocoa touch application. (I know it's not allowed from a web app.) Is this true, or am I missing something obvious?

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• Blackberry custom slideshow-style BitmapField manager

  - by Diego Tori

  Right now, I'm trying to figure out how to implement the following: Suppose I have a custom Manager that has about 10 or so BitmapFields layed out in a horizontal manner (similar to a slideshow contained in a HFM ) . What I want to achieve is to be able to move the image HFM via touchEvent horizontally, where a BitmapField would take focus on the left-hand side of the custom Manager. In other words, will I have to give a value to setHorizontalScroll and if so, is it a matter of just incrementing that value when the user makes a left or right touch event. Also, how can I get the focus of a Field within a given position on the screen (i.e. the left-most Field on the HFM) when the HFM is scrolling sideways via touchEvent?

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• Can't resignFirstResponder with UITextView

  - by Calvin L

  I have a UITextView. I implemented a navigationBar UIBarButtonItem to respond to a touch and resign the firstResponder for my UITextView. But, when the selector method is called, the keyboard doesn't get dismissed. I checked the UITextView's responder status with isFirstResponder and it returns YES. I also checked it with canResignFirstResponder and the return value is NO. I must be missing something here...why is it returning NO? I get that I can override canResignFirstResponder by subclassing UITextView, but I'd like to avoid that if possible. Here's a code snippet: - (void) commentCancelButtonTouched:(id)sender { NSLog(@"Cancel button touched"); [self.navigationBar popNavigationItemAnimated: NO]; if ([self.textInput.textView canResignFirstResponder] == NO) { NSLog(@"I don't want to resign!"); } [self.textInput.textView resignFirstResponder]; }

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• How can I play video by touching the button on the video thumnail of the video in tableviewcell ?

  - by srikanth rongali

  I have a table view in which if each cell is touched video plays. Each cell have image of the video cell.imageView.image. And on the image I have a button (UIButton) with play symbol. If I touch the play button the corresponding video should be played same like the when cell is touched. I have a selector for the play button. But I need (NSIndex*)indexPath to get the current row. But I can't access the indexPath in my selector. How can I make this? Thank You.

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• Exposing headers on iPhone static library

  - by leolobato

  Hello guys, I've followed this tutorial for setting up a static library with common classes from 3 projects we are working on. It's pretty simple, create a new static library project on xcode, add the code there, a change some headers role from project to public. The tutorial says I should add my library folder to the header search paths recursively. Is this the right way to go? I mean, on my library project, I have files separated in folders like Global/, InfoScreen/, Additions/. I was trying to setup one LOKit.h file on the root folder, and inside that file #import everything I need to expose. So on my host project I don't need to add the folder recursively to the header search path, and would just #import "LOKit.h". But I couldn't get this to work, the host project won't build complaining about all the classes I didn't add to LOKit.h, even though the library project builds. So, my question is, what is the right way of exposing header files when I setup a Cocoa Touch Static Library project on xCode?

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• Making element draggable with Android WebView (ideally, just with Javascript) ?

  - by GJTorikian

  I'm building an app with a build target of 1.5 . I have a variable, WebView browser, that is calling loadUrl to load a static HTML page from my assets folder. In that HTML page, the following JavaScript is defined: var supportsTouch = ('createTouch' in document); ... var w = $('wrapper'); w[supportsTouch ? 'touchmove' : 'onmousemove'] = move; w[supportsTouch ? 'touchend' : 'onmouseup'] = function(event){ dragging = false; }; where move is another function that handles the dragging. Unfortunately, this doesn't seem to work. I cannot figure out a concise list of which touch events are available to Android--is it ontouchmove, or touchmove? Am I supposed to set up an onTouchEvent call back in my Java code, which then launches the JavaScript function?

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• Implementing tracing gestures on iPhone

  - by bmoeskau

  I'd like to create an iPhone app that supports tracing of arbitrary shapes using your finger (with accuracy detection). I have seen references to an Apple sample app called "GestureMatch" that supposedly implemented exactly that, but it was removed from the SDK at some point and I cannot find the source anywhere via Google. Does anyone know of a current official sample that demonstrates tracing like this? Or any solid suggestions on other resources to look at? I've done some iPhone programming, but not really anything with the graphics API's or custom handling of touch gestures, so I'm not sure where to start.

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• Why are the default UI controls in my iPhone app blurred?

  - by Tom H

  Why would the default iPhone interface elements, specifically the UISwitch (unmodified) and a UISegmentedControl appear slightly blurred? I have not changed them or called any private APIs. This blurring occurs when I run it both in the simulator and when I load it on my iPod Touch, so I don't think it's a one off drawing glitch. These elements were created via some code (initWithFrame:) not in interface builder. Here is a screenshot of the blurring in the simulator: http://drp.ly/14rS6a It looks similar on the actual device. Thanks for your help

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• How to calculate a point with an given center, angle and radius?

  - by mystify

  In this SO question, someone asked for calculating an angle from three points. I need to do the opposite thing. I want to draw a clock, and I have tiny tick images. An art dude made 60 of them, each with an individual and accurate shadow. So there are 60 distinct images at 10x10 points in size, already correctly rotated in the center of that square. So every 6 degrees one tick image has to be placed. I would just need to calculate the x/y coordinate based on a center point, an radius and an angle. So I have: an center point an radius an angle Is there an easy way to calculate the x/y coordinate with this? Maybe cocoa-touch already has a useful function or method for this?

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• How can we show the preview image of the video in table view cell ?

  - by srikanth rongali

  I have a table view and if we touch a cell a video plays. I need to show the preview image of the video in the UITableViewCell. I have kept some dummy image in the cell at image place and remaining space ion cell is with some labels and buttons. I need the image preview of the video with play symbol on it. How can I make this ? Should I use any photoshop type of things or any programable things. I do not know photoshop. Thank You.

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• How can I play video by touching the button on the video image of the video in tableviewcell ?

  - by srikanth rongali

  I have a table view in which if each cell is touched video plays. Each cell have image of the video cell.imageView.image. And on the image I have a button (UIButton) with play symbol. If I touch the play button the corresponding video should be played same like the when cell is touched. I have a selector for the play button. How can I relate the corresponding cell to the play button. Thank You.

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• UITextView or UIWebView with normal words looking like links

  - by diwup

  Hey guys, I was looking at the Twitter for iPhone app and was puzzled. First of all, there are normal words looking like links inside. Second, when I touch those link-like words, the text view (or maybe web view) jumps to the corresponding part below (yes, it doesn't open Safari, it just jumps to the text within that text/web view) Now I want to implement the same effects. I should base my implementation on what? UITextView or UIWebView? How to make normal words look like links? How to make those smooth jumps within such a text/web views? Thanks in advance.

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• How to show/hide UIImageView when I want.

  - by Madness64

  I'm having a little problem with an iPhone app I'm currently developing. When the user touch a button, it calls an IBAction named refreshQuestion, which is supposed to show an image hover the screen to ask the user to wait a moment, then it has to call another function, and finally it has to hide the image. The problem is that the image won't appear. As well as the network activity indicator. Any help? Here is the code : - (IBAction)refreshQuestion:(id)sender{ pleaseWait.hidden = NO; [UIApplication sharedApplication].networkActivityIndicatorVisible = YES; [self loadData]; pleaseWait.hidden = YES; [UIApplication sharedApplication].networkActivityIndicatorVisible = NO; }

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• iPhone: Going from transformed layers to jpeg

  - by Devin Ross

  I have a bunch of images that are transformed (using touch gestures). I want to take the transformations the user does to the images and create a jpeg from it. (ie. if a user rotates a photo to the right, I want to get a jpeg of the photo rotate to the right just as the looks on screen). This takes into account that the photo could be bigger than whats displayed on screen too (no screenshots). I'm trying to use CGContext (CGContextRotateCTM specifically) but its not been too successful. Thanks for the help.

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• Is there a way to get the current UIEvent being handled?

  - by not-

  I'm working in a class that is a delegate of another class; this other class is in a third-party library that I'd like to avoid changing if at all possible. The original class is handling a -touchesEnded event, and is delegating responsibility to me, but it doesn't pass the UIEvent itself to me. Is there a way to get a handle to the current event in progress? It's a double-tap handler, and all that is passed to me is the view being touched, and the point at which the touch occurred. I want to know exactly how many touches are involved in the event. Thanks! randy

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• My table cells don't highlight immediately when touched

  - by Steve Denenberg

  Hi, In my app, I have a table view that has about eight cells. There is a navigation bar at the top. When a user touches a cell, nothing happens for about 1/2 second. Then the touched cell highlights blue and immediately the new view slides into position. The problem is that there is no feedback to the user about which cell he touched until just before the new view slides into position. For example, when I explore the tables in the iPhone's Settings application, when you touch a cell, the cell immediately turns blue, and then there is a 1/2 second delay, and then you see the new view. How do I get my table's feedback of highlighting the cells to happen immediately? I am using tableView didSelectRowAtIndexPath:, and each cell has an accessory button. Thanks for any insight.

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• iphone - Programmatically set (System-wide) proxy settings?

  - by Andrew

  I am new to iPhone development, so I'm sorry if this is a stupid question. I am developing an application whose purpose will be to route all iPhone activity through my company's proxy. Is there a way to programmatically set system-wide proxy settings in the iPhone (which will also take effect on the 3G connection)? I know there is a way to manually set proxy settings for each wifi connection. Detecting new networks and setting the proxy on them would be acceptable. However, I need to also be able to set the proxy on the 3G connection. Also, bonus: Is there a way to programmatically change the "Restrictions" settings? If anyone has any tips or can point me in the right direction, I would appreciate it. Thanks. EDIT: Please understand that this is for a legitimate purpose. Apple has to approve app store additions, so it's not like I'm trying to spread a virus. Please, constructive answers only.

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• "wait_fences: failed to receive reply: 10004003"?

  - by Michael

  I get this cryptic error the first time (and only the first time) my view is loaded due to the following line of code: - (void)viewWillAppear:(BOOL)animated { [textField becomeFirstResponder]; } There is a noticeable (~3 – 4 second, even on the simulator) delay due to this that makes my app feel unresponsive. Does anyone know how to fix this? I can't find any documentation on it on Apple's site, or any solutions here or on Google. Strangely, the opposite situation happens if I put the line in -viewDidAppear: instead of -viewWillAppear:; that is, instead of printing the error only the first time the keyboard is shown and never again, the error is not printed the first time but every time after. This is causing a major headache for me.

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• Best way to learn iphone audio queue services, step by step tutorial

  - by optician

  Hi Everyone, I'm trying to learn how to handle audio at a fairly low level with audio queue services. I have been progrmaing in memory managed languages for quite a while, and have just completed the c programing tutorial by vtc (2007). This has left me comfortable with the understanding of pointers and memory allocation, but the apple documention still leaves me wanting for a simpler implenation and explaination. Maybe I need to learn objective c and cocoa better. I have heard that this book is good. Cocoa(R) Programming for Mac(R) OS X (3rd Edition) Could someone suggest a learning path that is going to help me get an better understanding of working with audio and an iphone. I want to be able to play mp3 files back and also alter the pitch of them as they are playing. I am prepared that I may have to temporarily convert the mp3 files into pcm files to do things like that to them. Thanks everyone.

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• Core Text's CTFramesetterSuggestFrameSizeWithConstraints() returns incorrect size everytime

  - by nsapplication

  According to the docs, CTFramesetterSuggestFrameSizeWithConstraints () "determines the frame size needed for a string range". Unfortunately the size returned by this function is never accurate. Here is what I am doing: NSAttributedString *string = [[[NSAttributedString alloc] initWithString:@"lorem ipsum" attributes:nil] autorelease]; CTFramesetterRef framesetter = CTFramesetterCreateWithAttributedString((CFAttributedStringRef) string); CGSize textSize = CTFramesetterSuggestFrameSizeWithConstraints(framesetter, CFRangeMake(0,0), NULL, CGSizeMake(rect.size.width, CGFLOAT_MAX), NULL); The returned size always has the correct width calculated, however the height is always slightly shorter than what is expected. Is this the correct way to use this method? Is there any other way to layout Core Text? Seems I am not the only one to run into problems with this method. See https://devforums.apple.com/message/181450.

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