首先要在项目的info.plist里面添加,你要判断的APP里面添加URL Schemes!
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//是否安装APP
func isInstallation(urlString:String?) -> Bool {
let url = URL(string: urlString!)
if url == nil {
return false
}
if UIApplication.shared.canOpenURL(url!) {
return true
}
return false
}
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