AnyPromise+Retry.md

+ (AnyPromise *) retry:(int)count delay:(NSTimeInterval)delay block:(AnyPromise *(^)(void))block {
    AnyPromise* (^attemp)(void) = ^AnyPromise*() {
        return block().catch(^(NSError *error) {
            if(count <= 1) {
                @throw error;
            }
            return PMKAfter(delay).then(^{
                return [AnyPromise retry:count-1 delay:delay block:block];
            });
        });
    };
    
    return attemp();
}

Usage:

[AnyPromise retry:2 delay:1 block:^AnyPromise *{
        // Code that returns a AnyPromise object
        ......
 }];