iOS：增加 UIBarButtonItem 的间距

Question

我做了一个自定义，UINavigationBar看起来像这样：[

现在我想增加左栏按钮和左栏按钮之间的间距。我试图用这种方式做到这一点UIEdgeInsets：

self.navigationItem.leftBarButtonItem?.imageInsets = UIEdgeInsetsMake(0, 20, 0, 0)

然后它就会尖叫:

Answer 1

您可以在按钮之前添加额外的间距项：

    let button = UIBarButtonItem(title: "<", style: .plain, target: self, action: "someSelector")
    let spacing = UIBarButtonItem(barButtonSystemItem: .fixedSpace, target: nil, action: nil)
    spacing.width = 20;
    navigationItem.leftBarButtonItems = [spacing, button]