问题：

用Swift开发时，使用LLDB的po和print命令在控制台输出变量报错。

let a = 1(lldb) po a
(lldb) print a

错误信息

error: expression failed to parse:
warning: :11:7: warning: initialization of variable '$__lldb_error_result' was never used; consider replacing with assignment to '_' or removing it
  var $__lldb_error_result = __lldb_tmp_error
  ~~~~^~~~~~~~~~~~~~~~~~~~
  _

error: :19:5: error: cannot find '$__lldb_injected_self' in scope
    $__lldb_injected_self.$__lldb_wrapped_expr_78(
    ^~~~~~~~~~~~~~~~~~~~~

解决：

1. 使用frame variable variablename打印

frame variable可以简写成fr v或v

(lldb) frame variable a
(Int) a = 1(lldb) fr v a
(Int) a = 1(lldb) v a
(Int) a = 1

(lldb) frame variable this.dataArray[0]
(hdjlm.HDGoodsModel) [0] = {id = "0nOzwPbqBkS7t8GY7QudKUGU6-m9adjRUWqx3VGaGCYb"name = "奥克斯家用小型速干衣烘衣机风干机"tag = "天猫"image = "https://img.alicdn.com/bao/uploaded/i4/2794532420/O1CN01qlZ1D01TkPH6irS2s_!!0-item_pic.jpg"originPrice = "489"actualPrice = "484"sales = "10000"couponAmount = "5"rebateAmount = "10.45"src = "1"buyEconomy = ""shopName = "奥克斯赵记专卖店"couponLink = ""created = ""couponExpire = "1669391999"isCollect = false
}

 2. 使用frame variable -L veriablename打印堆栈地址

(lldb) po this.dataArray[0]
Fatal error: Call of deleted method
2022-11-21 18:20:20.401060+0800 hdjlm[7124:293069] Fatal error: Call of deleted method
error: Execution was interrupted, reason: signal SIGABRT.
The process has been returned to the state before expression evaluation.(lldb) frame variable -L this.dataArray[0]
0x00007f8928e38370: (hdjlm.HDGoodsModel) [0] = {
0x00007f8928e38370:   id = "0nOzwPbqBkS7t8GY7QudKUGU6-m9adjRUWqx3VGaGCYb"
0x00007f8928e38380:   name = "奥克斯家用小型速干衣烘衣机风干机"
0x00007f8928e38390:   tag = "天猫"
0x00007f8928e383a0:   image = "https://img.alicdn.com/bao/uploaded/i4/2794532420/O1CN01qlZ1D01TkPH6irS2s_!!0-item_pic.jpg"
0x00007f8928e383b0:   originPrice = "489"
0x00007f8928e383c0:   actualPrice = "484"
0x00007f8928e383d0:   sales = "10000"
0x00007f8928e383e0:   couponAmount = "5"
0x00007f8928e383f0:   rebateAmount = "10.45"
0x00007f8928e38400:   src = "1"
0x00007f8928e38410:   buyEconomy = ""
0x00007f8928e38420:   shopName = "奥克斯赵记专卖店"
0x00007f8928e38430:   couponLink = ""
0x00007f8928e38440:   created = ""
0x00007f8928e38450:   couponExpire = "1669391999"
0x00007f8928e38460:   isCollect = false
}

 3. 使用frame variable -o veriablename打印

(lldb) print this.dataArray[0]
Fatal error: Call of deleted method
2022-11-21 18:22:53.338750+0800 hdjlm[7124:293069] Fatal error: Call of deleted method
error: Execution was interrupted, reason: signal SIGABRT.
The process has been returned to the state before expression evaluation.(lldb) frame variable -o this.dataArray[0]
(hdjlm.HDGoodsModel) [0] = ▿ HDGoodsModel- id : "0nOzwPbqBkS7t8GY7QudKUGU6-m9adjRUWqx3VGaGCYb"- name : "奥克斯家用小型速干衣烘衣机风干机"- tag : "天猫"- image : "https://img.alicdn.com/bao/uploaded/i4/2794532420/O1CN01qlZ1D01TkPH6irS2s_!!0-item_pic.jpg"- originPrice : "489"- actualPrice : "484"- sales : "10000"- couponAmount : "5"- rebateAmount : "10.45"- src : "1"- buyEconomy : ""- shopName : "奥克斯赵记专卖店"- couponLink : ""- created : ""- couponExpire : "1669391999"- isCollect : false