This tag should be used only on questions that are about Objective-C features or depend on code in the language.
I am getting following warning when I try to present a ActivityController on navigation controller, Attempt to present <UIActivityViewController: 0…
ios objective-c uiactivityviewcontroller presentviewcontroller uiview-hierarchyI cant for the love of god the the hang of this resizing superview. I have a UIView *superview with 4 …
ios objective-c uiview autolayout autoresizeI want to use a selector on an NSObject instance without the need for an implemented protocol. For example, there's …
objective-c selector categoriesI just created a singleton method, and I would like to know what the function @synchronized() does, as I use …
objective-c ios cocoa-touchHow is it possible to convert a string to an NSDate on iOS?
objective-c cocoa-touch nsstring formatting nsdateI'm experimenting with how to use UIScrollView. After much trouble, I finally got the hang of it. But now I've …
ios objective-c uiviewcontroller uiscrollview nslayoutconstraintI'm aware of the pickerView:viewForRow:forComponent:reusingView method, but when using the view it passes in reusingView: how do …
ios objective-c uiview ios7 uipickerviewI am trying to mask an image with something like this: Would you please help me? I am using this …
ios objective-c uiimage maskA NSInteger is 32 bits on 32-bit platforms, and 64 bits on 64-bit platforms. Is there a NSLog specifier that always matches …
objective-c cocoa 32bit-64bit nslog nsintegerI have a UIWebView which inside a UIScrollView (scrollview contain another component) I tried to enable multitouch both on Interface …
objective-c ios cocoa-touch uiwebview zoom