在navgationController中添加UISegmentedControl

NSArray *segmentedArray = [NSArray arrayWithObjects:@"患者基本信息",@"患者信息",nil];

UISegmentedControl *segmentedControl = [[UISegmentedControl alloc]initWithItems:segmentedArray];

segmentedControl.backgroundColor = [UIColor clearColor];

segmentedControl.selectedSegmentIndex = 0;//设置默认选择项索引

// [segmentedControl setWidth:70.0 forSegmentAtIndex:2];//设置指定索引选项的宽度

[segmentedControl addTarget:self action:@selector(segmentAction) forControlEvents:UIControlEventValueChanged];

self.navigationItem.titleView = segmentedControl;

self.navigationItem.titleView.backgroundColor = [UIColor clearColor];

self.navigationItem.titleView.tintColor = [UIColor whiteColor];