- (void)scrollViewDidScroll:(UIScrollView *)scrollView
{//开始滚动，判断位置，然后替换复用的三张图[self changeImageWithOffset:scrollView.contentOffset.x];
}- (void)changeImageWithOffset:(CGFloat)offsetX
{if (offsetX >= ScrollWidth * 2){_currentIndex++;if (_currentIndex == _MaxImageCount-1){[self changeImageLeft:_currentIndex-1 center:_currentIndex right:0];}else if (_currentIndex == _MaxImageCount){_currentIndex = 0;[self changeImageLeft:_MaxImageCount-1 center:0 right:1];}else{[self changeImageLeft:_currentIndex-1 center:_currentIndex right:_currentIndex+1];}_PageControl.currentPage = _currentIndex;}if (offsetX <= 0){_currentIndex--;if (_currentIndex == 0) {[self changeImageLeft:_MaxImageCount-1 center:0 right:1];}else if (_currentIndex == -1) {_currentIndex = _MaxImageCount-1;[self changeImageLeft:_currentIndex-1 center:_currentIndex right:0];}else {[self changeImageLeft:_currentIndex-1 center:_currentIndex right:_currentIndex+1];}_PageControl.currentPage = _currentIndex;}
}

#pragma mark - 给复用的imageView赋值- (void)changeImageLeft:(NSInteger)LeftIndex center:(NSInteger)centerIndex right:(NSInteger)rightIndex
{if (_isNetworkImage){[_leftImageView sd_setImageWithURL:[NSURL URLWithString:_imageArray[LeftIndex]] placeholderImage:_placeholderImage];[_centerImageView sd_setImageWithURL:[NSURL URLWithString:_imageArray[centerIndex]] placeholderImage:_placeholderImage];[_rightImageView sd_setImageWithURL:[NSURL URLWithString:_imageArray[rightIndex]] placeholderImage:_placeholderImage];}else{_leftImageView.image = _imageArray[LeftIndex];_centerImageView.image = _imageArray[centerIndex];_rightImageView.image = _imageArray[rightIndex];}[_scrollView setContentOffset:CGPointMake(ScrollWidth, 0)];
}