无法更改搜索栏背景颜色 [英] Cannot change search bar background color

问题描述

我有一个搜索栏：

let searchBar:UISearchBar = UISearchBar(frame: CGRectMake((searchView.frame.width - UIScreen.mainScreen().bounds.width / 1.6) / 2, 0, UIScreen.mainScreen().bounds.width / 1.6, 24))

我想更改文本输入部分背景颜色。为此，我试过：

and I want to change text input part background color. For this I've tried:

searchBar.barTintColor = UIColor(red: 0/255, green: 74/255, blue: 103/255, alpha: 1)

searchBar.backgroundColor = UIColor.redColor()

但这两种变体都不起作用。如何更改我的UISearchBar textInput部分的背景颜色以及我做错了什么？

but these both variants do not work. How can I change background color of my UISearchBar textInput part and what I did wrong?

推荐答案

如果您只想更改它您的ViewController并不希望其他任何地方生效，然后使用

If you only want to change it in your ViewController and don't want anywhere else to effect then use

for view in searchBar.subviews {
            for subview in view.subviews {
                if subview .isKindOfClass(UITextField) {
                    let textField: UITextField = subview as! UITextField
                    textField.backgroundColor = UIColor.redColor()
                }
            }
        }

但如果您希望在整个应用程序中进行更改并定位到iOS 9.0或更高版本，则应使用appearanceWhenContainedInInstancesOfClasses，如

But if you want it to be change in whole app and targeting the iOS 9.0 or later then should be using appearanceWhenContainedInInstancesOfClasses like

UITextField.appearanceWhenContainedInInstancesOfClasses([UISearchBar.self]).backgroundColor = UIColor.redColor()

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