设置tableView背景颜色

[treeTableView setAutoresizingMask:UIViewAutoresizingFlexibleWidth|UIViewAutoresizingFlexibleHeight];

[treeTableView setBackgroundColor:[UIColor blueColor] /*#fff9f4*/];

[treeTableView setSeparatorStyle:UITableViewCellSeparatorStyleSingleLine];

[treeTableView setRowHeight:45.0f];

treeTableView.backgroundView = [[UIView alloc] init];

treeTableView.backgroundColor = [UIColor clearColor];

[self.view addSubview:treeTableView];