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I am having a hard time consuming a very simple (Hello World) WCF web service in my iPhone app. From what I have read, you must manually create the request message then send it to the web service URL.

Hey all. I'm still pretty new to iPhone development, and I'm having a bit of trouble figuring out how to change the title of my Navigation Bar. On another question on this site somebody recommended using :

If I put only an image in a button and set the imageEdgeInsets more close to the top, the image stays centered and all works as expected:

I am attempting to get a UIGestureRecognizer working with a UIWebview which is a subview of a UIScrollView. This sounds odd but when I have the numberOfTouchesRequired set to 2 the selector fires, but when numberOfTouchesRequired is set to one the selector doesn't fire.

Any good photo browsing library for Objective C, except Three20 ?

I read about bitwise operators today and they seem rather handy to me. I also noticed Apple uses them too, for example with UIViewAutoresizing .

It appears that all the touch methods of a UIView are only called if the touches began within the bounds of that view. Is there a way to have a view respond to a user who has touched outside the view, but then dragged his fingers into the view?

When we assign memory to a class variable, should we release it or set it to nil in dealloc method? What is the best practice?

I'm thinking of upgrading to iOS SDK 4.2. But what I'm wondering is if I'll still be able to run the simulator as iOS 3.2. This is because I'm creating iAds for iPad but I still want to check if my program will run with iOS 3.2.

I would like to start a server request, you can cancel.

Could somebody please show me how to use the object property on NSNotifcationCenter. I want to be able to use it to pass an integer value to my selector method.

Anybody knows the default font size of UITableViewCell?

I have a custom UITableView cell that I've added a textbox to for editing, that shows and hides based on the edit mode. I've also tried adding a vertical line that shows when editing, and it does that, but I'm running into some drawing issues. I just added a green checkmark rightView to start working on input validation feedback, and I'm seeing similar issues.

I have a UINavigationController that contains 3 UIViewControllers on the stack.

Is there any good advice on uploading files to the device? I've seen many apps create a http server on 80 or 8080 to upload files. Does that mean I have to implement a server too?

I'm trying to save managed object with one of the attribute's type Date to the managedObjectContext .

I'm writing application which perfectly works on 4.0/4.1 iPhone simulator, but not 4.2. I'm getting such warning: Detected an attempt to call a symbol in system libraries that is not present on the iPhone: fcntl$UNIX2003 called from function get_socket_nonblocking in image TestApp. If you are encountering this problem running a simulator binary within gdb, make sure you 'set start-with-shell off' first. How to set 'set start-with-shell off' on Xcode? I'm tried to add this line to .gdbinit but without luck. With 4.0/4.1 SDK iPhone Simulator prints warnings about attempt to call symbol that is not present on the iPhone in debug window, but app don't crashes. Using using 4.2 app crashes. How to prevent 4.2 crashes ? Thanks Source: Tips4all

I stored global variables in my AppDelegate and access them by: AppDelegate *d = [[UIApplication sharedApplication] delegate]; d.someString = ... What's the recommend way to save some typing and so I don't need to AppDelegate *d = [[UIApplication sharedApplication] delegate]; again and again? Thanks! Source: Tips4all

I need to interview some people for a mobile developer position (iphone) soon. The problem is that my strength is in Java web development. What questions should i ask without sounding like an idiot? Also, what are valid answers to these questions? Source: Tips4all

I reading song from iPod library using assetUrl (in code it named audioUrl) I can play it many ways, I can cut it, I can make some precessing with this but... I really don't understand what I gonna do with this CMSampleBufferRef to get data for drawing waveform! I need info about peak values, how I can get it this (maybe another) way? AVAssetTrack * songTrack = [audioUrl.tracks objectAtIndex:0]; AVAssetReaderTrackOutput * output = [[AVAssetReaderTrackOutput alloc] initWithTrack:songTrack outputSettings:nil]; [reader addOutput:output]; [output release]; NSMutableData * fullSongData = [[NSMutableData alloc] init]; [reader startReading]; while (reader.status == AVAssetReaderStatusReading){ AVAssetReaderTrackOutput * trackOutput = (AVAssetReaderTrackOutput *)[reader.outputs objectAtIndex:0]; CMSampleBufferRef sampleBufferRef = [trackOutput copyNextSampleBuffer]; if (sampleBufferRef){/* what I gonna do with this? */} Please hel