xcode编译过程中出现如下问题
Undefined symbols for architecture armv7:
...
ld: symbol(s) not found for architecture armv7
collect2: ld returned 1 exit status
Command /.../... failedwith exit code 1

那么显然是类库没有导入进来:

例:AFNetWorking 拖动工程里,然后报错,然后添加

问题解决

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