添加导航栏

Question

任何人可以就如何导航栏中添加分段控制代码帮助....我已经看到它在某些应用中分段控制与和要实现它

感谢

Answer 1

你想使用Interface Builder还是仅使用代码？

使用IB操作非常简单，您只需将分段控件拖放到标题所在的导航栏上即可。标题将被分段控制所替代。

如果您想在代码中完成此操作，请参阅this section of iPhone reference library。您似乎需要将导航项目的titleView属性设置为您的分段控件，它是UIView的子类，因此这是完全合法的。

Answer 2

在viewDidLoad：

OBJ-C：

NSArray *segmentTitles = @[ 
    @"segment1", 
    @"segment2", 
]; 

UISegmentedControl *segmentedControl = [[UISegmentedControl alloc] initWithItems:segmentTitles]; 
segmentedControl.selectedSegmentIndex = 0; 
segmentedControl.autoresizingMask = UIViewAutoresizingFlexibleWidth; 
// change the width from 400.0 to something you want if it's needed 
segmentedControl.frame = CGRectMake(0, 0, 400.0f, 30.0f); 
[segmentedControl addTarget:self action:@selector(segmentChanged:) forControlEvents:UIControlEventValueChanged]; 

self.navigationItem.titleView = segmentedControl; 

迅速：

let segmentTitles = [ 
    "segment1", 
    "segment2", 
] 

let segmentedControl = UISegmentedControl(items: segmentTitles) 
segmentedControl.selectedSegmentIndex = 0 
segmentedControl.autoresizingMask = UIViewAutoresizing.FlexibleWidth 
// change the width from 400.0 to something you want if it's needed 
segmentedControl.frame = CGRectMake(0, 0, 400.0, 30.0) 
segmentedControl.addTarget(self, action: "segmentChanged:", forControlEvents: UIControlEvents.ValueChanged) 

self.navigationItem.titleView = segmentedControl