以编程方式将UIBarButtonItem添加到UIToolbar？

Question

这就是我需要的.

我有我的应用程序的免费版本和付费版本.加载付费版本时,我的UIToolBar上需要3个UIBarButtons.当加载免费版本时,我需要4个UIBarButtons.在最右边的barButton,我需要色调蓝色,而其余的默认是黑色.而且我假设他们之间有灵活的空间来平衡他们.我已经尝试通过IB做到这一点,但我似乎无法让它与间距正确.如您所见,带有3个按钮的底部工具栏与工具栏的间距不均匀.(我想以编程方式执行此操作)

#ifdef LITE_VERSION


#else

[buyButton removeFromSuperview];

#endif

Answer 1

UIToolbar* toolbar = [[UIToolbar alloc]
                  initWithFrame:CGRectMake(0, 0, 320, 45)];
[toolbar setBarStyle: UIBarStyleBlackOpaque];

// create an array for the buttons
NSMutableArray* BarbuttonsArray = [[NSMutableArray alloc] initWithCapacity:5];

// create a clearAll button
UIBarButtonItem * clearAllButton = [[UIBarButtonItem alloc] initWithTitle:@"Clear All" 
                             style:UIBarButtonItemStylePlain
                             target:self
                             action:@selector(clearAllAction:)];

clearAllButton.style = UIBarButtonItemStyleBordered;
[BarbuttonsArray  addObject:clearAllButton];
[clearAllButton release];


 // create a calculate button
 UIBarButtonItem *calculateButton = [[UIBarButtonItem alloc]initWithTitle:@"Calculate" 
                             style:UIBarButtonItemStylePlain
                           target:self
                           action:@selector(calculateButton:)];
calculateButton.style = UIBarButtonItemStyleBordered;
[BarbuttonsArray  addObject:calculateButton];
[calculateButton release];


// create a settingButton
UIBarButtonItem *settingButton = [[UIBarButtonItem alloc]initWithTitle:@"Setting" 
                             style:UIBarButtonItemStylePlain
                             target:self
                             action:@selector(settingButton:)];
settingButton.style = UIBarButtonItemStyleBordered;
[BarbuttonsArray  addObject:settingButton];
[settingButton release];


 // create a buyNowButton

UIBarButtonItem *buyNowButton = [[UIBarButtonItem alloc]initWithTitle:@"Buy Now" 
                             style:UIBarButtonItemStylePlain
                          target:self
                          action:@selector(buyNowButton:)];
buyNowButton.style = UIBarButtonItemStyleBordered;
[BarbuttonsArray  addObject:buyNowButton];
[buyNowButton release];


 // put the BarbuttonsArray in the toolbar and release them
[toolbar setItems:BarbuttonsArray  animated:NO];
[BarbuttonsArray  release];

// place the toolbar into the navigation bar
self.navigationItem.leftBarButtonItem = [[UIBarButtonItem alloc] initWithCustomView:toolbar];
[toolbar release];


//before using these lines of code you have to alloc and make the property of   UINavigationController in your appDelegate

尝试使用这可能会对你有所帮助