以编程方式检查是否安装了应用程序 [英] Programmatically check whether an app is installed

问题描述

我想知道是否有以下 Objective-C 代码的 Swift 等价物

I would like to know whether there is a Swift equivalent of the following Objective-C code

NSURL *appURL = [NSURL URLWithString: @"myapp://"];
if ([app canOpenURL: appURL] {
 NSLog(@"The app is this URL Scheme is installed on the device");
}

推荐答案

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方法基本相同:

if let appURL = NSURL(string: "myapp://test/url/") {
    let canOpen = UIApplication.sharedApplication().canOpenURL(appURL)
    println("Can open \"\(appURL)\": \(canOpen)")
}

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