iOS 10.1系统以前tableFooterView或tabl

看一下代码

 [self.footView addSubview:self.earnBonusView];
 [self.footView addSubview:self.confirmOrderFooterView];
 self.tableView.tableFooterView = self.footView;

CGFloat bonusViewHeight = (CGFloat)[self.confirmOrderFooterView getBonusViewHeight];
CGFloat earnBonusViewHeight = [self.earnBonusView earnBonusViewHeight:isShowEarnBonus];
CGFloat confirmFootViewHeight = TableFooterViewHeight - 16 + bonusViewHeight;
self.footView.height = earnBonusViewHeight + confirmFootViewHeight;
if (earnBonusViewHeight == 0) {
    self.confirmOrderFooterView.frame = CGRectMake(0, 0, kScreenWidth, confirmFootViewHeight);
} else {
    self.earnBonusView.frame = CGRectMake(0, 0, kScreenWidth, earnBonusViewHeight);
    self.confirmOrderFooterView.frame = CGRectMake(0, self.earnBonusView.bottom, kScreenWidth, confirmFootViewHeight);
}

问题：

self.footView.height高度变了，在10.1系统上面对应的tableview contentOffSize会对应改变，但是在10.1系统以前不变，这就造成如果高度变大，tableview无法滑动到低

解决办法：修改高度后加上两行代码

self.tableView.tableFooterView = nil;
self.tableView.tableFooterView = self.footView;

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