Navigationbar With Segmented Button

实现带Segmented Button的Navigationbar：

NSArray *itemArray = [NSArray arrayWithObjects: @"All", @"Some", nil];
chooseAllORSome = [[UISegmentedControl alloc] initWithItems:itemArray];
chooseAllORSome = CGRectMake(0,0,150, 32);
chooseAllORSome.segmentedControlStyle = UISegmentedControlStyleBar;
chooseAllORSome.selectedSegmentIndex = 0;
[chooseAllORSome addTarget:self action:@selector(pickOne:)  forControlEvents:UIControlEventValueChanged];
UIBarButtonItem *segmentBarItem = [[UIBarButtonItem alloc] initWithCustomView: chooseAllORSome];
self.navigationItem.rightBarButtonItem = segmentBarItem;
self.navigationItem.title = @"Hello";
[segmentBarItem release];