This tag should be used only on questions that are about Objective-C features or depend on code in the language.
I submitted my app a little over a week ago and got the dreaded rejection email today. It tells me …
objective-c cocoa-touch first-responderI'm trying to rotate a UIImageView 360 degrees, and have looked at several tutorials online. I could get none of them …
ios objective-c animation uiview core-animationI upgraded Xcode version and when using external static libraries, I get this message: ld: file is universal (3 slices) but …
ios objective-c xcode ios6 static-librariesI thought I knew what was causing this error, but I can't seem to figure out what I did wrong. …
ios objective-c encoding nsuserdefaultsFor example when passing a value message to an NSInteger instance like so [a value] it causes an EXC_BAD_…
objective-c cocoa nsintegerI got an error when archiving a project. This is my environment. Mac OS Lion Xcode 4.3.1 iOS SDK 5.1 The project …
iphone objective-c ios xcode4.3 cocoapodsCan someone explain to me in detail when I must use each attribute: nonatomic, copy, strong, weak, and so on, …
objective-c automatic-ref-counting declared-propertyI'm trying to present a view controller modally, with a transparent background. My goal is to let both the presenting …
ios objective-c modalviewcontroller presentmodalviewcontrollerI'm trying to do that for a couple of days now, and after reading tons of messages of people trying …
ios objective-c uitableview cocoa-touch uitextfieldI use [NSNumber numberWithInt:42] or @(42) to convert an int to NSNumber before adding it to an NSDictionary: int intValue = 42; NSNumber *…
objective-c nsnumber