-(void)animationBlock

{

    if (!isScrollTop) {

        // self.hotCityView.hidden = YES;

        [UIViewbeginAnimations:nilcontext:nil];

        [UIViewsetAnimationDelegate:self];

        // [UIView setAnimationDidStopSelector:@selector(animationDidStop:finished:context:)];

        [UIViewsetAnimationCurve:UIViewAnimationCurveEaseInOut];

        [UIViewsetAnimationDelay:0.1];

        [UIViewsetAnimationDuration:0.4];

        TTLog(@"hotcityview x y %f%f",self.hotCityView.center.x,self.hotCityView.center.y);

        TTLog(@"indexcityview x y %f%f",self.indexCityView.center.x,self.indexCityView.center.y);

        self.indexCityView.center = indexcityViewCenter;

        

        int row = (hotCityArray.count%4 > 0)?hotCityArray.count/4 + 1:hotCityArray.count/4;

        self.indexCityView.frame =CGRectMake(0, self.hotCityView.frame.origin.y + 39, self.indexCityView.frame.size.width, self.indexCityView.frame.size.height + row *41);

 

        //self.indexCityView.frame =CGRectMake(0, self.indexCityView.frame.origin.y -2, self.indexCityView.frame.size.width, self.indexCityView.frame.size.height + row *41);

        //   TTLog(@"indexcityview y %f",self.indexCityView.frame.size.height + self.hotCityView.frame.origin.y + self.hotCityView.frame.size.height);

        

        //self.cityScrollView.frame = CGRectMake(0, self.cityScrollView.frame.origin.y, 320, self.indexCityView.frame.size.height - self.indexView.frame.size.height);

        [UIViewcommitAnimations];

        isScrollTop = YES;

    }

  

}

content size, frame, 小黑点，

 // self.indexCityView.center = indexcityViewCenter;

        

        int row = (hotCityArray.count%4 > 0)?hotCityArray.count/4 + 1:hotCityArray.count/4;

        self.indexCityView.frame =CGRectMake(0, self.hotCityView.frame.origin.y + 39, self.indexCityView.frame.size.width, self.indexCityView.frame.size.height + row *41);,这两句话 效果是一样的，一个设置 center,一个设置  frame,