iOS TableView底部视图被遮挡

使用子视图添加tableView，tableView的footerView无法显示。

UIView *view = [[UIView alloc] initWithFrame:CGRectMake(0, KNavgationBarHeight + kStatusBarHeight, self.view.frame.size.width, 200)];
    view.backgroundColor = [UIColor redColor];
    view.userInteractionEnabled = YES;
    [self.view addSubview:view];
    
    self.btn = [UIButton buttonWithType:UIButtonTypeCustom];
    self.btn.frame = CGRectMake(0, 0, 200, 30);
    [self.btn setTitle:@"跳" forState:UIControlStateNormal];
    self.btn.center = view.center;
    [self.btn addTarget:self action:@selector(btnClick:) forControlEvents:UIControlEventTouchUpInside];
    [self.view addSubview:self.btn];
    DetailViewController *detailVC = [[DetailViewController alloc] init];
    [self.view addSubview:detailVC.view];
    [self addChildViewController:detailVC];
    [detailVC didMoveToParentViewController:self];
    [detailVC.view mas_makeConstraints:^(MASConstraintMaker *make) {
        make.edges.equalTo(@0);
    }];
    
    
    DetailViewController viewDidLoad:
    self.tableView = [[UITableView alloc] initWithFrame:CGRectMake(0, 200 + KNavgationBarHeight + kStatusBarHeight, self.view.frame.size.width, self.view.frame.size.height)];
    self.tableView.delegate = self;
    self.tableView.dataSource = self;
    [self.view addSubview:self.tableView];
    UIView *footerView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, self.view.frame.size.width, 135)];
    footerView.backgroundColor = [UIColor whiteColor];
    [footerView addSubview:self.checkBtn];
    self.checkBtn.center = footerView.center;
    self.tableView.tableFooterView = footerView;
    [self.tableView registerClass:[XHAccountStep4CreditAuthCell class] forCellReuseIdentifier:@"cell"];

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原因是子控制器中tableView高度没有减去导航栏高度KNavgationBarHeight + kStatusBarHeight和上面的红色视图的高度200。tableView的frame高度不能写死。要么减去KNavgationBarHeight + kStatusBarHeight + 200,要么添加约束到vc的view的四边。

    self.tableView = [[UITableView alloc] initWithFrame:CGRectMake(0, 200 + KNavgationBarHeight + kStatusBarHeight, self.view.frame.size.width, self.view.frame.size.height - 200 - KNavgationBarHeight - kStatusBarHeight)];
    self.tableView.delegate = self;
    self.tableView.dataSource = self;
    [self.view addSubview:self.tableView];
    UIView *footerView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, self.view.frame.size.width, 135)];
    footerView.backgroundColor = [UIColor whiteColor];
    [footerView addSubview:self.checkBtn];
    self.checkBtn.center = footerView.center;
    self.tableView.tableFooterView = footerView;
    [self.tableView registerClass:[XHAccountStep4CreditAuthCell class] forCellReuseIdentifier:@"cell"];
    
    
    或
    
        self.tableView = [[UITableView alloc] initWithFrame:CGRectMake(0, 200 + KNavgationBarHeight + kStatusBarHeight, self.view.frame.size.width, self.view.frame.size.height)];
    self.tableView.delegate = self;
    self.tableView.dataSource = self;
    [self.view addSubview:self.tableView];
    UIView *footerView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, self.view.frame.size.width, 135)];
    footerView.backgroundColor = [UIColor whiteColor];
    [footerView addSubview:self.checkBtn];
    self.checkBtn.center = footerView.center;
    self.tableView.tableFooterView = footerView;
    [self.tableView registerClass:[XHAccountStep4CreditAuthCell class] forCellReuseIdentifier:@"cell"];
    
    [self.tableView mas_makeConstraints:^(MASConstraintMaker *make) {
        make.top.equalTo(self.view).offset(264);
        make.left.equalTo(@0);
        make.right.equalTo(@0);
        make.bottom.equalTo(@0);
    }];

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