iOS Swift判断代码运行在模拟器上

iOS模拟器有些功能没有，比如拍照，因此代码中需要加个模拟器判断，查了好多文章，终于找到了。swift代码如下：

struct Platform {
    static let isSimulator: Bool = {
        var isSim = false
        #if arch(i386) || arch(x86_64)
            isSim = true
        #endif
        return isSim
    }()
}

// Elsewhere...

if Platform.isSimulator {
    // Do one thing
}
else {
    // Do the other
}

参考 http://themainthread.com/blog/2015/06/simulator-check-in-swift.html