1.UIBbarButtonItem的初始化。

根据SDK的文档，我们可以发现UIBbarButtonItem有如下几种初始化的方法：

-initWithTitle

-initWithImage

-initWithBarButtonSystemItem

-initWithCustomView

第4种方法就是我们添加各种作料的接口，所以今天的主角其它也是它。

2.在UIToolBar上面添加Title

UIToolbar *myToolBar = [[UIToolbar alloc] initWithFrame:  
                            CGRectMake(0.0f, 0.0f, 320.0f, 44.0f)];  
                              
NSMutableArray *myToolBarItems = [NSMutableArray array];  
[myToolBarItems addObject:[[[UIBarButtonItem alloc]  
                                initWithTitle:@"myTile"   
                                style:UIBarButtonItemStylePlain   
                                target:self   
                                action:@selector(action)] autorelease]];  
[myToolBar setItems:myToolBarItems animated:YES];  
[myToolBar release];  
[myToolBarItems];     

                                                    
setItems传入值或者说items是一个对象数组。

3.在UIToolBar上面添加image

[myToolBarItems addObject:[[[UIBarButtonItem alloc]  
                    initWithImage:[UIImage imageNamed:@"myImage.png"]   
                    style:UIBarButtonItemStylePlain   
                    target:self   
                    action:@selector(action)]]; 

4.在UIToolBar上面添加SystemItem

[myToolBarItems addObject:[[[UIBarButtonItem alloc]  
                    initWithBarButtonSystemItem:UIBarButtonSystemItemPlay   
                    target:self   
                    action:@selector(action)] autorelease]];  

Note:

initWithBarButtonSystemItem初始化：

- (id)initWithBarButtonSystemItem:(UIBarButtonSystemItem)systemItem target:(id)target action:(SEL)action

Defines system defaults for commonly used items.

typedef enum {  
UIBarButtonSystemItemDone,  
UIBarButtonSystemItemCancel,  
UIBarButtonSystemItemEdit,  
UIBarButtonSystemItemSave,  
UIBarButtonSystemItemAdd,  
UIBarButtonSystemItemFlexibleSpace,  
UIBarButtonSystemItemFixedSpace,  
UIBarButtonSystemItemCompose,  
UIBarButtonSystemItemReply,  
UIBarButtonSystemItemAction,  
UIBarButtonSystemItemOrganize,  
UIBarButtonSystemItemBookmarks,  
UIBarButtonSystemItemSearch,  
UIBarButtonSystemItemRefresh,  
UIBarButtonSystemItemStop,  
UIBarButtonSystemItemCamera,  
UIBarButtonSystemItemTrash,  
UIBarButtonSystemItemPlay,  
UIBarButtonSystemItemPause,  
UIBarButtonSystemItemRewind,  
UIBarButtonSystemItemFastForward,  
UIBarButtonSystemItemUndo,        // iPhoneOS 3.0  
UIBarButtonSystemItemRedo,        // iPhoneOS 3.0  
} UIBarButtonSystemItem;  

5.在UIToolBar上面添加其它各种控件,最自由意义，最有意思的，我把它放在最后来讲。我们使用initWithCustomView来完成，

这里需要看一下initWithCustomView的定义：

- (id)initWithCustomView:(UIView *)customView

可以看出，它的参数是一个VIEW，所以我们给它的配料要正确哦才行哦，否则，你就等着时间DIDADIDA的流失吧.

A>加一个开关switch：

[myToolBarItems addObject:[[[UIBarButtonItem alloc]   
                initWithCustomView:[[[UISwitch alloc] init] autorelease]]  
                autorelease]];

B>加一个按钮UIBarButtonItem

UIBarButtonItem *myButton = [[[UIBarButtonItem alloc]  
             initWithTitle:@"myButton"  
             style:UIBarButtonItemStyleBordered  
             target:self   
             action:@selector(action)]autorelease];  
get1Button.width = 50;  
[myToolBarItems addObject:myButton];

C>加一个文本Label

UILabel *myLabel = [[UILabel alloc] initWithFrame:CGRectMake(40.0f, 20.0f, 45.0f, 10.0f)];  
myLabel.font=[UIFont systemFontOfSize:10];  
//myLabel.backgroundColor = [UIColor clearColor];  
//myLabel.textAlignment=UITextAlignmentCenter;  
UIBarButtonItem *myButtonItem = [[UIBarButtonItem alloc]initWithCustomView:myLabel];  
[myToolBarItems addObject: myButtonItem];     
[mylabel release];  
[myButtonItem release];

D>加一个进度条UIProgressView

UIProgressView *myProgress = [[UIProgressView alloc] initWithFrame:CGRectMake(65.0f, 20.0f, 90.0f, 10.0f)];  
UIBarButtonItem *myButtonItem = [[UIBarButtonItem alloc]initWithCustomView:myProgress];  
[myToolBarItems addObject: myButtonItem];  
[myProgress release];                                             
[myButtonItem release];

可以加使用initWithCustomView制作各种button，这里就不在这里一个一个在加了。我想你应该也已经掌握了如何添加各种buttonItem的方法了。