更改UISearchBar的textField的背景 [英] Change the background of UISearchBar's textField

问题描述

我现在正在努力解决这个问题。已经到处搜索，但提供的解决方案仅适用于objective-c。其中包含

I'm struggling with this for a while now. Have searched everywhere but the solution provided only works with objective-c. Which consists in

UITextField * txt = [_ searchBar valueForKey：@_ searchField];

虽然有些人可能会说这是受保护的API，Apple可能会拒绝使用此类代码的应用。

Although some might say that this is protected API and Apple might refuse an app with such code.

所以，现在我已经尝试了很多方法来解决这个问题，而且根本没有工作。
我的代码是这样的：

So, now I've tried so many ways to work this out and it's not working at all. My code is this:

searchBar = UISearchBar(frame: CGRectMake(0, 0, 320.0, 30.0))
searchBar.autoresizingMask = UIViewAutoresizing.FlexibleWidth
searchBar.searchBarStyle = UISearchBarStyle.Minimal
searchBar.layer.cornerRadius = 15
searchBar.delegate = self

searchBar.backgroundColor = UIColor.whiteColor()

if floor(NSFoundationVersionNumber) <= NSFoundationVersionNumber_iOS_6_1{
    // Load resources for iOS 6.1 or earlier
    searchBar.placeholder = "Search";
} else {
    // The following "hack" (if we can call that) breaks the UI for different size devices.
    // Load resources for iOS 7 or later
    searchBar.placeholder = "Search                                         ";
}

这给了我奇怪的结果：

This gives me the bizarre result:

虽然我想要的只是里面的文字字段UISearchBar有一个白色背景，而SearchBar本身的cornerRadius比如15.

While what I want is just the textfield inside the UISearchBar to have a white background and the SearchBar itself have a cornerRadius of, say, 15.

我该怎么做？

非常感谢提前

推荐答案

您必须访问UISearchBar中的UITextField。你可以用
使用 valueForKey（searchField）

You have to access the UITextField inside the UISearchBar. You can do that by using valueForKey("searchField")

var textFieldInsideSearchBar = yourSearchbar.valueForKey("searchField") as? UITextField

textFieldInsideSearchBar?.textColor = yourcolor
textFieldInsideSearchBar?.backgroundColor = backgroundColor
...

你可以改变任何参数，比如UITextField的textColor或backgroundColor

there you can change any parameters like textColor or backgroundColor of the UITextField

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