UInavigationController导航栏添加Item

• 以在导航栏右侧添加按钮为例

    //添加编辑按钮
    UIButton *editBtn = [UIButton buttonWithType:UIButtonTypeCustom];
    [editBtn setTitle:@"编辑" forState:UIControlStateNormal];//设置按钮标题
    [editBtn setTitleColor:[UIColor whiteColor] forState:UIControlStateNormal];//设置标题字体颜色
    editBtn.titleLabel.font = [UIFont systemFontOfSize:17];//设置标题字体大小
    editBtn.frame = CGRectMake(0, 0, 50, 30);//设置按钮frame
    [editBtn addTarget:self action:@selector(edit:) forControlEvents:UIControlEventTouchUpInside];//监听点击事件
    self.navigationItem.rightBarButtonItem = [[UIBarButtonItem alloc] initWithCustomView:editBtn];//添加到导航栏

-效果如图