Question

我有一系列条形按钮，我通常设置如下：

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

但是，我想更改左侧的这些按钮，而不是居中对齐。谁知道我怎么能这样做？提供示例或使用我的按钮这样做将是一个加号。

谢谢！

Answer 1

据我了解你的问题，它需要有一些左边的按钮，一些在中间，一些在右边有相对的分隔符。直接导航不会提供把按钮放在中间，或者在TitleView

中

您可以像这样将自定义标题视图设置到导航栏。

//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;

看起来像THIS

可能会对你有帮助。

HTH，享受编码!!

以编程方式创建UIBarButton

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