可以在toolBar上添加任何View。其实它的原理是把你要添加的View先加到UIBarButtonItem里面，最后再把UIBarButtonItem数组一次性放到toolbar的items里面。
1.首先，我们看一下UIBbarButtonItem有哪些初始化方法，这也可以看出，它可以被定义为什么东东，然后加到UIToolBar上面去。
根据SDK的文档，我们可以发现UIBarButtonItem有如下几种初始化的方法：
-initWithTitle（添加button用这个）
-initWithImage
-initWithBarButtonSystemItem（添加系统自定义的button，形状跟大小都已经固定了）下面链接里面有按钮图片样式
https://developer.apple.com/library/ios/#documentation/UIKit/Reference/UIBarButtonItem_Class/Reference/Reference.html
-initWithCustomView（添加除了button以外的View）
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
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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
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[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
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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。
