iOS经典讲解之在navigationBar上面添加多个任意控件

在navigationBar上面添加多个任意控件

今天这道菜主要是在navigationBar上面加入任意数量的任何控件。

(转载请保留此文字：本文来源:[[iphone开发私房菜_1_] 在navigationBar上面添加多个任意控件 http://blog.csdn.net/ipromiseu/archive/2010/12/16/6080474.aspx] write by Gray.Luo [email protected])

    基本的 navigationBar上面就左,中,右 3个位置，而且默认也是添加UIBarButtonItem/UINavigationBar按钮，但是很多开发过程中会遇到在上面添加更多其它控件，经过研究后，所以特写此文，算是做个笔记，也希望能够帮助朋友解决正在解决的这方面的问题。

1.在固定位置添加UIBarButtonItem

UIBarButtonItem *myButton = [[[UIBarButtonItem alloc]
                initWithTitle:@"myButton"
                style:UIBarButtonItemStyleBordered
                target:self
                action:@selector(action)]autorelease];
self.navigationItem.leftBarButtonItem = myButton;
//self.navigationItem.rightBarButtonItem = myButton;
//self.navigationItem.backBarButtonItem = myButton;
[myButton release];

 

  NavigationItem类有以下一些成员：

-title

-titleview

-backBarButtonItem//这是有返回上一级事件的后退按钮

-rightBarButtonItem

-leftBarButtonItem

 

 

2.在任意位置添加一个UIToolbar叠加到navigationBar上，然后设置其背景透明，则可以实现在上这个navigationBar 上面添加多个按钮的效果

UIToolbar *mycustomToolBar;
NSMutableArray *mycustomButtons = [[NSMutableArray alloc] init];
UIBarButtonItem *myButton1 = [[[UIBarButtonItem alloc]
                initWithTitle:@"Get5"
                style:UIBarButtonItemStyleBordered
                target:self
                action:@selector(action)]autorelease];
myButton1.width = 40;
[mycustomButtons addObject: myButton1];
UIBarButtonItem *myButton2 = [[[UIBarButtonItem alloc]
                initWithTitle:@"Play5"
                style:UIBarButtonItemStyleBordered
                target:self
                action:@selector(action)]autorelease];
myButton2.width = 40;
[mycustomButtons addObject: myButton2];

mycustomToolBar = [[UIToolbar alloc] initWithFrame:CGRectMake(0.0f, 0.0f,320.0f, 44.0f)];
//mycustomToolBar.center = CGPointMake(160.0f,200.0f);
mycustomToolBar.barStyle = UIBarStyleDefault;
[mycustomToolBar setItems:mycustomButtons animated:YES];
[mycustomToolBar sizeToFit];
[self.view addSubview:mycustomToolBar];
//self.navigationItem.titleView = mycustomToolBar;//与上一句都可实现在上面叠加工具条
//将toolbar的颜色设置为透明，总之使用两个控件叠加完美
[mycustomToolBar release];
[mycustomButtons release];

 

这里是在UIToolbar 上面添加UIBarButtonItem,然而我们很多时候可能会添加其它控件，如：switch,label等等，所以在UIToolbar上面如何添加各种控件，就参考下一篇文章。

3.在任意位置添加 UISegmentedControl

UISegmentedControl * mySegment;
mySegment = [[UISegmentedControl alloc]
               initWithFrame:CGRectMake(5.0f, 10.0, 60.0f, 30.0f)];
[mySegment insertSegmentWithTitle:@"mySeg1" atIndex:0 animated:YES];
[get5Segment insertSegmentWithTitle:@"mySeg2" atIndex:1 animated:YES];
mySegment.segmentedControlStyle = UISegmentedControlStyleBar;
[mySegment addTarget:self action:@selector(segAction:) forControlEvents:UIControlEventValueChanged];
mySegment.selectedSegmentIndex = -1;
[self.navigationController.navigationBar addSubview: mySegment];
[mySegment release];

 

如果要在navigationBar实现多个按钮，而且某个功能块的类似按钮需要挨在一起，用segment实现还是很不错，用UIBarButtonItem实现的话，按钮间总是有一个间隔。

4.在任意位置添加UILabel

UILabel* myLabel;
myLabel=[[UILabel alloc] initWithFrame:CGRectMake(100.0f, 14.0f, 100.0f, 10.0f)];
myLabel.font=[UIFont systemFontOfSize:10];
myLabel.backgroundColor = [UIColor clearColor];
[self.navigationController.navigationBar addSubview: myLabel];
[myLabel release];

 

5.在任意位置添加 UIProgressView 

    UIProgressView *myProgress;
myProgress =[[UIProgressView alloc] initWithFrame:CGRectMake(80.0f, 28.0f, 150.0f, 8.0f)];
[self.navigationController.navigationBar addSubview: myProgress];
[myProgress release];