Ios 以编程方式创建以UIBarButton为中心的

我有一系列的条形按钮，通常设置如下：

 NSArray *leftButtonArray = [[NSArray alloc]initWithObjects: backBarButton, separator1,postBarButton, separator1, memeBarButton, separator1, pollBarButton, nil];
self.navigationItem.leftBarButtonItems = leftButtonArray;

但是，我想将左侧的这些按钮改为居中对齐。有人知道我怎么做吗？提供一个例子或使用我的按钮这样做将是一个加分

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谢谢

据我所知，您的问题需要在左侧有一些按钮，中间有一些按钮，右侧有一些按钮带有相对分隔符。直接导航将不提供将按钮放在中间，或在标题视图中

您可以这样将自定义标题视图设置为导航栏

//To hide default back button
self.navigationItem.hidesBackButton=YES;

//Title View for Navigation
UIView *navTitle1 = [[UIView alloc] initWithFrame:CGRectMake(0, 0, self.view.frame.size.width, 44)];
[navTitle1 setBackgroundColor:[UIColor lightGrayColor]];

//Left View button and separator
UIButton *backBarButton = [[UIButton alloc] initWithFrame:CGRectMake(0, 0, 50, 44)];
[backBarButton setTitle:@"Back" forState:UIControlStateNormal];

UIView *ttlview1 = [[UIView alloc] initWithFrame:CGRectMake(51, 0, 1, 44)];
[ttlview1 setBackgroundColor:[UIColor darkGrayColor]];


//Center view with two buttons and seprator for them
UIView *middleView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 121, 44)];
[middleView setBackgroundColor:[UIColor clearColor]];
[middleView setCenter:navTitle1.center];

UIButton *postBarButton = [[UIButton alloc] initWithFrame:CGRectMake(0, 0, 60, 44)];
[postBarButton setTitle:@"Post" forState:UIControlStateNormal];

UIView *ttlview2 = [[UIView alloc] initWithFrame:CGRectMake(middleView.frame.size.width/2, 0, 1, 44)];
[ttlview2 setBackgroundColor:[UIColor darkGrayColor]];

UIButton *memeBarButton = [[UIButton alloc] initWithFrame:CGRectMake((middleView.frame.size.width/2)+1, 0, 60, 44)];
[memeBarButton setTitle:@"Meme" forState:UIControlStateNormal];

[middleView addSubview:ttlview2];
[middleView addSubview:postBarButton];
[middleView addSubview:memeBarButton];

//Right button with seprator before that
UIView *ttlview3 = [[UIView alloc] initWithFrame:CGRectMake(self.view.frame.size.width-71, 0, 1, 44)];
[ttlview3 setBackgroundColor:[UIColor darkGrayColor]];

UIButton *pollBarButton = [[UIButton alloc] initWithFrame:CGRectMake(self.view.frame.size.width-70, 0, 50, 44)];
[pollBarButton setTitle:@"POLL" forState:UIControlStateNormal];

[navTitle1 addSubview:backBarButton];
[navTitle1 addSubview:ttlview1];
[navTitle1 addSubview:middleView];
[navTitle1 addSubview:ttlview3];
[navTitle1 addSubview:pollBarButton];
self.navigationItem.titleView = navTitle1;

看起来

也许这对你有帮助

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享受编码的乐趣

你说的“中心对齐”是什么意思？它们位于左侧，因为您制作了

leftBarButtonims

。如果你不想那样，就不要那样做。你想要什么？你想在中间有一堆按钮，是吗？中间的按钮（我在左边和右边各有几个）导航栏的中心被标题视图占据。因此，创建一个包含一些按钮的视图，并将其设置为

标题视图

。从另一篇文章尝试了以下操作，但不起作用[self.navigationController.toolbar setItems:[NSArray arrayWithObjects:flexibleSpace，postBarButton，separator1，memeBarButton，separator1，pollBarButton，flexibleSpace，nil]；您前面标记的解决方案可能不起作用，原因如下：（弹性空间似乎重叠）