iOS自定义工具栏（Toolbar）

自定义工具栏，可以创建多个Item。

//创建工具栏

[self.navigationController
setToolbarHidden:NO
animated:YES];

[self.navigationController.toolbar
setBarStyle:UIBarStyleDefault];

self.navigationController.toolbar.frame=CGRectMake(0,
[UIScreen mainScreen].bounds.size.height-44,
[UIScreen mainScreen].bounds.size.width,
44);

UIBarButtonItem *spaceItem = [[UIBarButtonItem
alloc]

initWithBarButtonSystemItem:UIBarButtonSystemItemFlexibleSpace

target:nil
action:nil];

UIBarButtonItem *customItem1 = [[UIBarButtonItem
alloc]

initWithTitle:@"预览"
style:UIBarButtonItemStyleDone

target:self
action:@selector(toolBarItem1:)];

UIBarButtonItem *customItem2 = [[UIBarButtonItem
alloc]

initWithTitle:@"确定"
style:UIBarButtonItemStyleDone

target:self
action:@selector(toolBarItem2:)];

NSArray *arr1 = [[NSArray
alloc]initWithObjects:customItem1,spaceItem,customItem2,
nil];

self.toolbarItems = arr1;

[super
viewDidLoad];

参考：http://www.runoob.com/ios/att-ios-ui-toolbar.html