CallKit 执行[callController reques

执行

[callController requestTransaction:transaction completion:^(NSError * _Nullable error) {
if (error) {
NSLog(@"Error requesting transaction: %@",error);
} else {
NSLog(@"Requested transaction successfully");
}

的时候报错：Error requesting transaction: Error Domain=com.apple.CallKit.error.requesttransaction Code=1 "(null)"

解决办法是： 项目->targets->capabilities->background mode设置on ，把Voice over IP勾上