KVO versus NSNotifications
118927
NSNotification VS KVO
109186
How come I can cast to NSManagedObject but not to my entity's type?
3539
Easiest way to detect Internet connection on iOS?
111562
How to make NSTimer and some operations keep working on background?
14468
What's the best way to communicate between view controllers?
83487
Disable Repeated System Alerts in iOS 7
69595
Comparing NSNumbers in Objective C
120464
How to use Javascript to communicate with Objective-c code?
100174
How to compare two NSDates: Which is more recent?
2413
How to determine which app is creating a notification
77625
How to check for an active Internet connection on iOS or macOS?
90834
How to handle Objective-C protocols that contain properties?
79177
Objective-C enumerateObjectsUsingBlock vs fast enumeration?
65384
send message to multiple objects at once (objective-c)
84165
Custom class NSObject not key value coding compliant
99640
Receiving Push Notifications while in background
24375
Alternatives to dispatch_get_current_queue() for completion blocks in iOS 6?