今天这道菜主要是在navigationBar上面加入任意数量的任何控件。
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
- UIBarButtonItem *myButton = [[[UIBarButtonItem alloc]
- initWithTitle:@"myButton"
- style:UIBarButtonItemStyleBordered
- target:self
- action:@selector(action)]autorelease];
- self.navigationItem.leftBarButtonItem = 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.barStyle = UIBarStyleDefault;
- [mycustomToolBar setItems:mycustomButtons animated:YES];
- [mycustomToolBar sizeToFit];
- [self.view addSubview:mycustomToolBar];
-
-
- [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];
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！(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 guohui.great@gmail.com)
