UITableView tableHeaderView autolayout自动计算高度

//测试代码
@interface ViewController ()<UITableViewDataSource> 

@property (weak, nonatomic) IBOutlet UITableView *tableView;

@property (strong, nonatomic)  UILabel *headerLable;

@property (strong, nonatomic)  UIView *headerView;

@end

    //Auto Layout能够计算出正确的界面的必要条件是约束充分
    self.headerLable = [UILabel new];
    self.headerLable.numberOfLines = 0;
    self.headerView  = [UIView  new];
    
    [self.headerView addSubview:self.headerLable];
    [self.headerLable mas_makeConstraints:^(MASConstraintMaker *make) {
        make.edges.mas_equalTo(self.headerView).valueOffset([NSValue valueWithUIEdgeInsets:UIEdgeInsetsMake(10, 10, 10, 10)]);
    }];
    
    self.tableView.tableHeaderView = self.headerView;
    [self.headerView mas_makeConstraints:^(MASConstraintMaker *make) {
        make.width.mas_equalTo(self.view.mas_width);
    }];
    
    self.headerLable.text = @"测试文本测试文本测试文本测试文本测试文本测试文本测试文本测试文本测试文本测试文本";

    [self.tableView.tableHeaderView layoutIfNeeded];
    self.tableView.tableHeaderView = self.headerView;