将iOS TabBar项标题调整为其中心

Question

//TabBarController code:

self.delegate=self;
self.tabBarController.tabBar.delegate=self;

CGRect viewFrame=self.tabBar.frame;
viewFrame.origin.y -=0;![enter image description here][1]
viewFrame.origin.x -=0;
viewFrame.size.height=30;
self.tabBar.frame=viewFrame;

firstViewController = [[FirstViewController alloc] initWithNibName:nil bundle:NULL];
secondViewController = [[SecondViewController alloc] initWithNibName:nil bundle:NULL];

NSArray *twoViewControllers = [[NSArray alloc] initWithObjects:
                                       self.firstViewController, self.secondViewController, nil];

self.viewControllers=twoViewControllers;



//    ====================================================
//    
//    FirstViewController code in initWithNibName: 
//    
//    To set the title of the first tabbar item:


- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
    self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
    if (self) {
        self.title = @"Article view";
        NSLog(@"count = %d",[self.tabBarController.tabBar.items count]);

    }
    return self;
}

//如何在不向tabbaritem添加任何//图像的情况下将第一个tabbar项目标题"Article View"设置为中心？

//类似于下面的tabbar项截图.

  [1]: http://i.stack.imgur.com/xBpVH.png


Thanks in advance.

Answer 1

替换initWithNibName方法

- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
    self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
    if (self) {
        self.title = @"Article view";
        self.tabBarItem.imageInsets = UIEdgeInsetsMake(5, 0, -5, 0);
        NSLog(@"count = %d",[self.tabBarController.tabBar.items count]);
    }
    return self;
}

self.tabBarItem.imageInsets = UIEdgeInsetsMake(5, 0, -5, 0); 这一行在这里以下列方式调整tabBarItem的图像位置:

将图像沿x方向'+5'和y方向'-5'从默认位置移动.

玩,UIEdgeInsetsMake玩得开心.干杯.