我们如何创建一个更大的中心 UITabBar 项

问题描述

我想知道我们如何创建一个更大的中心 UITabBar，如下图所示?真的很漂亮！！！

I am wondering how do we create a bigger center UITabBar like the shot below? Its really beautiful!!!!

推荐答案

我建议你看看下面的文章.它解释了如何自定义提升主按钮的标签栏.

I recommend you taking a look at the following article. It explains how to customise a tab bar raising the main button.

代码:

UIButton* button = [UIButton buttonWithType:UIButtonTypeCustom];
button.frame = CGRectMake(0.0, 0.0, buttonImage.size.width, buttonImage.size.height);
[button setBackgroundImage:buttonImage forState:UIControlStateNormal];
[button setBackgroundImage:highlightImage forState:UIControlStateHighlighted];

CGFloat heightDifference = buttonImage.size.height - self.tabBar.frame.size.height;
if (heightDifference < 0)
   button.center = self.tabBar.center;
else
{
 CGPoint center = self.tabBar.center;
 center.y = center.y - heightDifference/2.0;
 button.center = center;
}

[self.view addSubview:button];

指南:https://github.com/boctor/idev-recipes/tree/master/RaisedCenterTabBar