xcode4.2

I want to use Twitter framework for iOS 5, but be able to run my app in older OS. I added weak referenced framework (i.e. set "optional" flag) in Xcode 4.2 Target settings. Base SDK is iOS 5, iOS deployment Target is iOS 3.2. Next, I try to use Twitter framework: #import <Twitter/Twitter.h> ... Class twClass = NSClassFromString(@"TWTweetComposeViewController"); if (!twClass) // Framework not available, older iOS { [self shareWithTwitterPriorIOS5]; return; } if ([TWTweetComposeViewController canSendTweet]) // Check if twitter is setup and reachable { TWTweetComposeViewController* twc = [

I can't get this working. If I drop the master UITableView to use Static cells I can get the segues working, such that when you click on a row in the master it automatically pushes the Child controller on. But with 'dynamic prototype' cells, I click on one of the cells and nothing happens... Am I supposed to programmatically push the child controller within the prepareForSegue method or something? In which case I'm not sure what advantage a segue here would have over the old way of just using No, you don't have to manually push the child controller. Did you connect a segue in your storyboard

I have a property that I do not synthesize, instead I create a getter and setter myself. Therefore, the ARC keywords (strong or weak) have no meaning, I assume, so I eliminate them. This works fine on Xcode 4.3, but when my coworker opens them on XCode 4.2 the compiler complains that there is no strong/weak keyword, so I instructed him to meaninglessly enter the keyword back in again. Which is correct (with or without keywords)? To be clear: I have a property like this @property (nonatomic) NSString *foo and in the .m file I implement -(NSString *)foo and -(void)setFoo:(NSString *)foo and do

I have never had this problems until I began to use Xcode 4.2. I'm getting the following error trying to upload my app: Unable to verify icon dimensions, no icon found. Your minimum os version is below 3.2, so you must define CFBundleIconFile or provide a default Icon.png that is 57x57 I have an "Icon.png" image and is 57x57. I tried add it and remove it from info.plist. No success. I don't know what to do. Here is my info.plist file Info.plist edited again SOLUTION Thanks for your comments. The problem was that I was not following the right steps to prepare the app for submission in Xcode 4.

This is driving me crazy, when i try to compile on the simulator, everything is ok, but on the device i got this error: ld: library not found for -lz Command /Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/clang failed with exit code 1 Please help me understand the source of the problem: Ld /Users/ZConsulting/Library/Developer/Xcode/DerivedData/Fontenay-sous-Bois-dhlecgdgtoldsadoctkyueriyius/Build/Products/Debug-iphoneos/Fontenay-sous-Bois.app/Fontenay-sous-Bois normal armv7 cd /Users/ZConsulting/Desktop/Fontenay-sous-Bois setenv IPHONEOS_DEPLOYMENT_TARGET 5.0 setenv PATH "/Developer