SDAutolayout图片大小根据数量变化

只需要在自定义的PhotoContainerView中做一下判断就可以了

if (self.photoNamesArray.count == ) {
        [self setupAutoWidthFlowItems:[temp copy] withPerRowItemsCount: verticalMargin: horizontalMargin: verticalEdgeInset: horizontalEdgeInset:];
    } else if (self.photoNamesArray.count == ) {
        [self setupAutoWidthFlowItems:[temp copy] withPerRowItemsCount: verticalMargin: horizontalMargin: verticalEdgeInset: horizontalEdgeInset:];
    } else {
        [self setupAutoWidthFlowItems:[temp copy] withPerRowItemsCount: verticalMargin: horizontalMargin: verticalEdgeInset: horizontalEdgeInset:];
    }