代码之家 › 专栏 › 技术社区 › Steve Madsen

How to determine if an iOS device has a cellular radio?

ios reachability iphone

Steve Madsen · 技术社区 · 15 年前

Is it possible, without including an exhaustive list of models in the code, to determine if an iOS device includes a cellular radio?

我正在为一个应用程序添加一个主机可访问性检查,我希望失败消息适合这个设备。例如:

A network connection is not available. Please join a Wi-Fi network or move to a location with better cellular reception.

This is fine for iPhone and iPad 3G, but it's amateur for an iPod touch or iPad without 3G. For those devices, I'd like to remove mention of cellular service.

I don't want to create an array in code of every iOS device that Apple has shipped that has a cellular radio.

2 回复 | 直到 15 年前

progrmr 15 年前

There doesn't seem to be a way. Erica Sadun has an interesting UIDevice-hardware extension project on github but it can't determine whether there is cellular radio either.

bentford Marko Hlebar 15 年前

The best you can do is use the Apple provided sample project for Reachability.

http://developer.apple.com/library/ios/#samplecode/Reachability/Introduction/Intro.html

It has three states of the network status:

typedef enum {
    NotReachable = 0,
    ReachableViaWiFi,
    ReachableViaWWAN
} NetworkStatus;

如果 ReachableViaWiFi 状态返回,不提蜂窝服务。

This will be an improvement because even with a cellular radio you might in a wifi only location.

推荐文章

sudoExclamationExclamation · iOS自动布局-高度不能小于ThanOrEqualTo

1 年前

Tulon · Firebase身份验证SwiftUI:更改密码后,电子邮件验证状态变为真

1 年前

Danil · 种子/填充核心数据的最佳实践?[关闭]

1 年前

HeWhoRemains · 如何在SwiftUI中创建圆形文本,根据度数变化从一条直线变为一个完美的圆?

1 年前

Robin · LazyVGrid项目预计不会击中测试区域

1 年前

Mahendra · Popover不是从SwiftUI中的项目列表中打开的[重复]

1 年前

Alex Smith · 移动到下一个视图控制器后如何显示警报?

1 年前

sadiq shareef · 即使更新了我的苹果应用程序网站关联文件,iOS应用程序也不会在点击网址时启动

1 年前

selcukctn · 如何在react native中制作无限动画?

1 年前

Nicolas Gimelli · iOS 18远程通信通知不起作用

1 年前