iOS - _OBJC_CLASS_$_CTTelephonyNetworkInfo 未找到？
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iOS - _OBJC_CLASS_$_CTTelephonyNetworkInfo not found?
提问by Suchi
I am using the following code to get network info about my iPhone -
我正在使用以下代码获取有关我的 iPhone 的网络信息 -
#import <CoreTelephony/CTTelephonyNetworkInfo.h>
#import <CoreTelephony/CTCarrier.h>
CTTelephonyNetworkInfo *netInfo = [[CTTelephonyNetworkInfo alloc] init];
CTCarrier *carrier = [netInfo subscriberCellularProvider];
NSString *osVersion = [[UIDevice currentDevice] systemVersion];
But I get the error -
但我得到了错误 -
Undefined symbols for architecture armv7:
"_OBJC_CLASS_$_CTTelephonyNetworkInfo", referenced from:
objc-class-ref in MyClass.o
ld: symbol(s) not found for architecture armv7
Isn't the class a part of the iOS SDK? What am I doing wrong?
该类不是 iOS SDK 的一部分吗？我究竟做错了什么？
回答by Joe
It is part of the CoreTelephony.framework. You need to add that frameworkfor your code to work.
它是CoreTelephony.framework 的一部分。您需要为您的代码添加该框架才能工作。
回答by Lasse
I had a similar issue. Mine was related to having multiple targets, where it would fail on only 1 target.
我有一个类似的问题。我的与有多个目标有关，它只会在 1 个目标上失败。
To resolve it I had to ctrl-click the CoreTelephone.framework and select to add it to all my schemes.
要解决它，我必须按住 ctrl 单击 CoreTelephone.framework 并选择将其添加到我的所有方案中。
The exact error I was getting was "Undefined symbols for architecture i386: "_OBJC_CLASS_$_CTTelephonyNetworkInfo","
我得到的确切错误是“架构 i386 的未定义符号：”_OBJC_CLASS_$_CTTelephonyNetworkInfo”，”
