The proper way of doing chain animations

Question

void (^first_animation)();
void (^second_animation)(BOOL finished);


// First animation

first_animation = ^()
{
    g_pin_info_screen.view.alpha = 1.0;
};


// Sec         


        

Answer 1

Just check here: https://gist.github.com/vadimsmirnovnsk/bce345ab81a1cea25a38

You can chain it in functional style:

dispatch_block_t animationsBlock = ^{
    [self.view updateConstraintsIfNeeded];
    [self.view layoutIfNeeded];
};

[[[[[[[[[BARAnimation construct]
    initially:animationsBlock]
    animationWithDuration:0.425 animationConditions:^{
        [gridView mas_updateConstraints:^(MASConstraintMaker *make) {
            make.top.equalTo(imageView).with.offset(32.0);
        }];
    } animations:animationsBlock]
    animationWithDuration:0.425 animationConditions:^{
        [gridView mas_updateConstraints:^(MASConstraintMaker *make) {
            make.top.equalTo(imageView).with.offset(0.0);
        }];
    } animations:animationsBlock]
    animationWithDuration:0.425 animationConditions:^{
        [gridView mas_updateConstraints:^(MASConstraintMaker *make) {
            make.top.equalTo(imageView).with.offset(-32.0);
        }];
    } animations:animationsBlock]
    animationWithDuration:0.425 animationConditions:^{
        [gridView mas_updateConstraints:^(MASConstraintMaker *make) {
            make.top.equalTo(imageView).with.offset(0.0);
        }];
    } animations:animationsBlock]
    animationWithDuration:0.8 animationConditions:nil animations:^{
        foreView.alpha = 1.0;
    }]
    finally:^{
        [self.didEndSubject sendNext:[RACUnit defaultUnit]];
        [self.didEndSubject sendCompleted];
    }]
    run];