如何在swift中将背景图像设置为colorWithPatternImage [英] how to set a background image as colorWithPatternImage in swift

问题描述

我的问题是，是否可以让 UIView 显示图像，如果可以，我该怎么做?我能找到的只是 colorwithpatternImage 不再适用于 swift .

My questions is, is it possible to have a UIView display an image, and if so, how so I do it? All I can find is the colorwithpatternImage which no longer works with swift.

我现在尝试使用的代码是:

The code I am trying to use now is:

self.view.backgroundColor = [UIColor colorWithPatternImage:[UIImage imageNamed:@"background.png"]];  

预先感谢您的回答！

推荐答案

参考UIColor 文档.

在 Swift 中，您必须调用便利构造函数.这是因为在 Swift 中，所有返回其类实例的 Objective-C 类方法都变成了便利初始化器.

In Swift, you have to call a convenience initializer. This is because in Swift, all Objective-C class methods which return an instance of their class become convenience initializers.

这是它在 Swift 中的样子:

Here's how it looks in Swift:

 self.view.backgroundColor = UIColor(patternImage: UIImage(named: "background.png"))

+ (UIColor *)colorWithPatternImage:(UIImage *)image 返回一个 UIColor 实例，因此它将成为 Swift 中的便利初始化程序.同样，UIImage imageNamed: 变成了 init(patternImage image: UIImage!).

+ (UIColor *)colorWithPatternImage:(UIImage *)image returns a UIColor instance, so it will become a convenience initializer in Swift. Similarly, UIImage imageNamed: becomes init(patternImage image: UIImage!).

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