Block Chaining

NSMutableArray* animationBlocks = [NSMutableArray new];

typedef void(^animationBlock)(BOOL);

animationBlock (^getNextAnimation)() = ^{
    animationBlock block = animationBlocks.count ? (animationBlock)animationBlocks[0] : nil;
    if (block)
    {
        [animationBlocks removeObjectAtIndex:0];
        return block;
    }
    else
    {
        return ^(BOOL finished){};
    }
};
  
[animationBlocks addObject:^(BOOL finished){
            [UIView animateWithDuration:0.5
                             animations:^{
                            //Animate stuff
                             }
                             completion: getNextAnimation()];
        }];


//Start the chain
  getNextAnimation()(YES);