Key-value Observing or KVO is a technology for observing changes in object properties.
I'm extending UIButton with generic functionality to change certain appearance attributes based on the displayed title. In order to do …
iphone objective-c cocoa-touch uibutton key-value-observingI am relatively new to KVO, so there is a good chance that I am violating some fundamental rule. I …
iphone key-value-observing nsexceptionI have some idea of which to use when but the exact usage is still not clear to me. Can …
iphone ios protocols key-value-observing nsnotificationsHow do you remove an observer from an object under ARC? Do we just add the observer and forget about …
ios cocoa-touch key-value-observing automatic-ref-countingI have an unordered array with instances of the following class: @interface Place : NSObject { } @property (nonatomic, copy) NSString *country; @property (…
objective-c cocoa sorting key-value-observing nssortdescriptorI've been trying to find an example, but what I've seen doesn't work in my case. What would be the …
swift swift4 key-value-observing keypathsI am hitting the below error after I added 2 additional fields to my core data model. CarPark_CarPark_ was deallocated …
objective-c ios core-data key-value-observingI have two classes in my app class A and Class B. Both class A and B are instances of …
iphone ios key-value-observingIn Objective-C, I would normally use something like this: static NSString *kViewTransformChanged = @"view transform changed"; // or static const void *kViewTransformChanged = &…
pointers swift key-value-observingI would like to know when a set of properties of a Swift object changes. Previously, I had implemented this …
swift swift3 key-value-observing