xcode 在 UIPickerView 中选择一行 - swift
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Selecting a row in a UIPickerView - swift
提问by Niall Kehoe
I'm trying to select a row of a picker view in Swift.I know there are other questions like this but they all have the same answers which doesn't work for me. Such questions can be located at : UIPickerView selectRow doesn't works.
我正在尝试在 Swift 中选择一行选择器视图。我知道还有其他类似的问题，但它们都有相同的答案，但对我不起作用。此类问题可以位于：UIPickerView selectRow 不起作用。
They all point to use this code in the viewDidAppear:
他们都指出在以下代码中使用此代码viewDidAppear：
pickerview.selectRow(3, inComponent: 0, animated: true)
But the View Controller still looks like this: 
但是视图控制器仍然是这样的：
Any ideas on how to select a row?
关于如何选择一行的任何想法？
采纳答案by DHShah01
It looks like you only have 3 elements in your picker. Pickerview element rows are 0-indexed, so instead of
看起来您的选择器中只有 3 个元素。Pickerview 元素行是 0 索引的，所以不是
pickerview.selectRow(1, inComponent: 0, animated: true)
pickerview.selectRow(2, inComponent: 0, animated: true)
pickerview.selectRow(3, inComponent: 0, animated: true)
you'll want
你会想要
pickerview.selectRow(0, inComponent: 0, animated: true)
pickerview.selectRow(1, inComponent: 0, animated: true)
pickerview.selectRow(2, inComponent: 0, animated: true)
