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。
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。
在UIToolBar上面添加image
[myToolBarItems addObject:[[[UIBarButtonItem alloc] initWithImage:[UIImage imageNamed:@"myImage.png"] style:UIBarButtonItemStylePlain target:self action:@selector(action)]];
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;
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。