在navigationBar上面添加多个任意控件

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
view plaincopy to clipboardprint?
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]; 
 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
view plaincopy to clipboardprint?
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]; 
 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
view plaincopy to clipboardprint?
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]; 
 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
view plaincopy to clipboardprint?
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]; 
 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
view plaincopy to clipboardprint?
    UIProgressView *myProgress;  
myProgress =[[UIProgressView alloc] initWithFrame:CGRectMake(80.0f, 28.0f, 150.0f, 8.0f)];  
[self.navigationController.navigationBar addSubview: myProgress];  
[myProgress release];    
  UIProgressView *myProgress;
 myProgress =[[UIProgressView alloc] initWithFrame:CGRectMake(80.0f, 28.0f, 150.0f, 8.0f)];
 [self.navigationController.navigationBar addSubview: myProgress];
 [myProgress release]; 
 
小结：通过上面的方法 ，应该可以抛砖引玉，让你自己添加其他任意控件。还等什么呢？赶快试一下吧，让你的navigationBar条丰富多彩吧