Top "Ios4" questions

Set starting point of content size for UIScrollView

How do I set the starting point of a UIScrollView? I would like to add a UIImageView left of the …

iphone objective-c ios4 uiscrollview contentsize

What is the secret behind "contentScaleFactor" of UIView when used with CATiledLayer?

Greetings, I'm working on an application inspired by the "ZoomingPDFViewer" example that comes with the iOS SDK. At some point …

uiview ios4 uiscrollview catiledlayer

iphone 4 sdk : detect return from background mode

How can I detect that an app has just returned from "background mode"? I mean, I don't want my app …

ios4 background-foreground

CLLocationmanager "locationServicesEnabled" method deprecated in iOS 4?

I know the property locationServicesEnabled is deprecated in iOS 4. Instead, I should call locationServicesEnabled In my app delegate method -(…

iphone ios cllocationmanager ios4

Getting displacement from accelerometer data with Core Motion

I am developing an augmented reality application that (at the moment) wants to display a simple cube on top of …

iphone ios4 accelerometer augmented-reality gyroscope

Cancel [self performSelector:... withObject:nil afterDelay:20];

I call method sr in viewDidLoad with below code,how can i cancel it before that method sr will call? […

xcode ios4 iphone

UIToolbar tint on iOS 4

just switched to iOS 4 on my iPhone 3GS and some of my apps broke. One issue I had is that …

iphone ios4 uitoolbar tint tintcolor

iOS: Movement Precision in 3D Space

From what I understand, GPS has limited accuracy. Is it possible to get a more precise location for a person …

iphone ios4 gps accelerometer gyroscope

Profile bug (Error launching remote program: failed to get the task for process XXX.)

Today I was messing with my Developer/Distribution settings and I seem to have changed something that I can not …

iphone ios4 adhoc

Make iOS blocks execute synchronously

How can I make a block execute synchronously, or make the function wait for the handler before the return statement, …

iphone ios cocoa-touch ios4 objective-c-blocks