2014/10/15 下午 10:04:09

iphone Programming Glossary: attempts

http://stackoverflow.com/questions/1001347/iphone-camera-preview-overlay

Preview Overlay how do I add an overlay UIImageView to the camera preview and handle touches on this My previous attempts to do this e.g. use UIImagePickerController and add the image as a subview have failed. iphone uiimageview camera uiimagepickercontroller..

Optimizing CLLocationManager/CoreLocation to retrieve data points faster on the iPhone

http://stackoverflow.com/questions/1081219/optimizing-cllocationmanager-corelocation-to-retrieve-data-points-faster-on-the

App first initializes you can be off in accuracy by 1000 meters or more thus one attempt is not going to do it. Three attempts after initialization usually gets you to within 47 or so meters which is good. Remember that each successive attempt is.. take the new location OR If the new location has an accuracy 50 meters take the new location OR If the number of attempts has exceeded 3 or 5 AND the accuracy 150 meters AND the location has CHANGED then this is a new location and the device.. return NSDate eventDate newLocation.timestamp NSTimeInterval howRecent abs eventDate timeIntervalSinceNow attempts if newLocation.coordinate.latitude oldLocation.coordinate.latitude newLocation.coordinate.longitude oldLocation.coordinate.longitude..

ios-Facebook SDK 3.0 Error 5 When Posting Status Update

http://stackoverflow.com/questions/11850899/ios-facebook-sdk-3-0-error-5-when-posting-status-update

After authenticating the user for the first time I can post ONE status update successfully. After that all subsequent attempts will fail with a FBiOSSDK error 5 in the console Error HTTP status code 400 . The only way to fix this is to remove the..

Is MonoTouch a viable platform for iPhone development?

http://stackoverflow.com/questions/1847274/is-monotouch-a-viable-platform-for-iphone-development

in a certain way it should look and feel and behave like other good iPhone apps and shouldn't be among the examples of attempts to write desktop apps for a phone which is where your average dev makes his first mistake when transitioning to mobile development..

How does -performSelector:withObject:afterDelay: work?

http://stackoverflow.com/questions/1922517/how-does-performselectorwithobjectafterdelay-work

䏭 run loop. The timer is configured to run in the default mode NSDefaultRunLoopMode . When the timer fires the thread attempts to dequeue the message from the run loop and perform the selector. It succeeds if the run loop is running and in the default..

Editing a UITextField inside a UITableViewCell fails

http://stackoverflow.com/questions/376372/editing-a-uitextfield-inside-a-uitableviewcell-fails

field and add some text I find that if try to move the insertion point it works the first time but fails on subsequent attempts. I am completely unable to move the selection no magnifying glass appears. Even more curious this setting seems to be permanent..

Create a UIImage by rendering UIWebView on a background thread - iPhone

http://stackoverflow.com/questions/4660999/create-a-uiimage-by-rendering-uiwebview-on-a-background-thread-iphone

a layer to a CGContext is a CPU consuming job I wouldn't like to use the main thread so not to hang the UI. My attempts so far were I tried to use renderInContext on the webView's layer to the UIGraphicalContext but the _WebTryThreadLock error..

Grand Central Dispatch (GCD) vs. performSelector - need a better explanation

http://stackoverflow.com/questions/5225130/grand-central-dispatch-gcd-vs-performselector-need-a-better-explanation

The timer is configured to run in the modes specified by the modes parameter. When the timer fires the thread attempts to dequeue the message from the run loop and perform the selector. It succeeds if the run loop is running and in one of..

Making a phone call in an iOS application

http://stackoverflow.com/questions/6323171/making-a-phone-call-in-an-ios-application

a phone call in an iOS application I have some code which attempts to make a call within an application but it doesn't seem to be working UIApplication myApp UIApplication sharedApplication..