在 Xcode 6.1 中.'UIImage?'没有名为“size"的成员错误 [英] In Xcode 6.1. 'UIImage?' does not have a member named 'size' Error

问题描述

我正在获取图像的 Size 并使用以下代码.它在 Xcode 6.0.1 上运行得非常好.更新到 Xcode 6.1 后，我收到错误:

I'm getting an image's Size and used the below code. It was working perfectly fine with Xcode 6.0.1. After updating to Xcode 6.1, I'm getting Error Like :

'UIImage?'没有名为 'size' 的成员

var image = UIImage(named: imageName)
let sizeOfImage = image.size

是我的代码还是 Apple 的错误?请帮我在这里.TIA.

Is it bug with my code or Apple ? Please help me in here. TIA.

推荐答案

该初始化器现在是一个可失败初始化器，因此它返回一个可选的 UIImage.

That initializer is now a failable initializer, and as such it returns an optional UIImage.

要快速修复您的错误，只需打开图片即可:

To quickly fix your bug just unwrap the image:

let sizeOfImage = image?.size

但我认为您将在代码中多次引用 image 变量，在这种情况下，我建议使用可选绑定:

but I presume you will reference the image variable more than just once in your code, in that case I suggest using optional binding:

if let image = image {
    let sizeOfImage = image.size
    /// ...
    /// Use the image
}

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