UINavigationItem titleView“如果设置了leftBarButtonItem则忽略"?

问题描述

UINavigationItem 的 titleView 属性文档 说:

The documentation for UINavigationItem's titleView property says:

如果 leftBarButtonItem 不为零，则忽略此属性."

但是，我在测试中设置了 titleView 和 leftBarButtonItem 属性，它们看起来都很好.我已经在我的 Xcode 中的所有模拟器上进行了测试:4.3、5.0 和 5.1.有谁知道文档是错误的，还是在我无法测试的某些旧版本(例如 4.2、3.x)上正确?

However, I've set both the titleView and leftBarButtonItem properties in my testing and they both appear to show up fine. I've tested on all the simulators in my Xcode: 4.3, 5.0, and 5.1. Does anyone know if the documentation is just wrong, or is it correct on some older versions (e.g. 4.2, 3.x) that I haven't been able to test?

推荐答案

查看属性文档 leftBarButtonItems，上面写着:

Check the documentation for property leftBarButtonItems, it says:

如果没有足够的空间来显示数组中的所有项目，那些会重叠标题视图(如果存在)或按钮右侧的栏不显示.

所以，对于 titleView 的说法可能是不正确的.

So, what's said for titleView is probably incorrect.

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