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Lio has asked 13 questions and find answers to 32 problems.

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Lio questions

WidgetKit doesn't work in Simulator on M1, any ideas?
Find out how many arguments a block needs
Is it ok to call performSelectorOnMainThread: after beginBackgroundTaskWithExpirationHandler is called and the application is in background?
Private methods using Categories in Objective-C: calling super from a subclass
Traversing key/values of an NSDictionary, is enumerateKeysAndObjectsUsingBlock more efficient than looping keys and calling objectForkey:?
Objective-c asynchronous communication: target/action or delegation pattern?
What is GCC_NO_COMMON_BLOCKS used for?
Why should I choose GCD over NSOperation and blocks for high-level applications?
What's the difference between DWARF and DWARF with dSYM file?

Lio answers

User not logged in error in Facebook SDK iOS
Facebook request thread problem
Protocol Extensions and subclasses
iOS - Finding a complex object in an array
Facebook Login Dialog does not work on iOS6 simulator
SKPaymentTransactionObserver not getting a callback on app switch
Core Data returns NSManagedObject instead of Concrete class, but only when using . accessor
Recognize if user has defined a native facebook account in iOS 6 settings
How to restore a Consumable In app Purchases?
Get thread specific info in iOS crash report?