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xcode Objective C - block examples

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Examples of how Objective-c objects work

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  1. //-----demonstrate how blocks hold their captured state
  2. NSDate *date = [NSDate date];
  3. void (^now)(void) = ^ {
  4.     NSLog(@"The date and time is %@", date);
  5. };
  6. now();
  7. sleep(5);
  8. date = [NSDate date];
  9. now();
  10.  
  11.  
  12. //--------------
  13.     int (^triple)(int) = ^(int number) {
  14.         return number * 3;
  15.     };
  16.     int result1 = triple(2);
  17.  
  18.     int (^multiply)(int, int) = ^(int x, int y) {
  19.         return x * y;
  20.     };
  21.     int result2 = multiply(2, 3);
  22.     NSLog(@"result %i", result2);
  23.     result2 = multiply(5, 3);
  24.     NSLog(@"result %i", result2);

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