如何以编程方式为UIButton添加系统图标?

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为 UIButton 添加自定义图像或背景很容易，但是似乎没有编程方式为 UIButton ，我知道它可以应用于导航栏按钮，我不需要，我想将其应用于简单的 UIButton ，有什么提示吗?

解决方案

对于Swift 5，语法为:

button.setImage(UIImage(systemName:"search")，用于:.normal)

您还可以通过添加 SymbolConfiguration :

来设置图标的权重:

让boldConfig = UIImage.SymbolConfiguration(weight:.bold)让boldSearch = UIImage(systemName:"search"，withConfiguration:boldConfig)button.setImage(boldSearch，for:.normal)

请参阅:

It's easy to add a custom image or a background for a UIButton , but there seems to be no programmatic way to set one of the following default iOS icons for a UIButton , I know it can be applied to navigation bar buttons, I don't need that, I want to apply it to a simple UIButton, any hints?

解决方案

For Swift 5 the syntax is:

button.setImage(UIImage(systemName: "search"), for: .normal)

You can also set the weight of the icon by adding SymbolConfiguration:

let boldConfig = UIImage.SymbolConfiguration(weight: .bold) let boldSearch = UIImage(systemName: "search", withConfiguration: boldConfig) button.setImage(boldSearch, for: .normal)

See: Apple documentation for available names (API column) or go to InterfaceBuilder, select UIButton and in Attributes Inspector select Image which will give you list of all available icons.