Assign a variable inside a Block to a variable outside a Block

by

You need to use this line of code to resolve your problem:

__block Person *aPerson = nil;

For more details, please refer to this tutorial: Blocks and Variables

More Related Contents:

  1. How do I avoid capturing self in blocks when implementing an API?
  2. What does the “__block” keyword mean?
  3. Retain cycle on `self` with blocks
  4. Compiler error: “initializer element is not a compile-time constant”
  5. Custom completion block for my own method [duplicate]
  6. When to use enumerateObjectsUsingBlock vs. for
  7. Implementing a method taking a block to use as callback
  8. What does this caret ^ syntax, with void on either side mean? [duplicate]
  9. Caret character between types rather than variables, surrounded by parentheses
  10. Block Declaration Syntax List
  11. What does the “Couldn’t compile connection:” error mean?
  12. Why can’t we use a dispatch_sync on the current queue?
  13. Alternatives to dispatch_get_current_queue() for completion blocks in iOS 6?
  14. Compiler error “expected method not found” when using subscript on NSArray
  15. How to dispatch on main queue synchronously without a deadlock?
  16. How to simplify callback logic with a Block?
  17. Checking Objective-C block type?
  18. Using __block and __weak
  19. How does a Block capture the variables outside of its enclosing scope?
  20. Why do nil / NULL blocks cause bus errors when run?
  21. What is the difference between a __weak and a __block reference?
  22. How to Check if an NSDate occurs between two other NSDates
  23. How does @synchronized lock/unlock in Objective-C?
  24. Objective-C: Forward Class Declaration
  25. Objective-C – CABasicAnimation applying changes after animation?
  26. Store data in MKAnnotation?
  27. How to perform Callbacks in Objective-C
  28. iOS Background downloads when the app is not active
  29. ARC – The meaning of __unsafe_unretained?
  30. RestKit: How does one post an array of objects?

Leave a Comment