Xcode中更漂亮的调试输出打印Swift字典 [英] Prettier debug output printing Swift Dictionary in Xcode

问题描述

当我在Swift的字典中使用 print（）时，它在控制台中变得非常漂亮，带有一个键和一个值。

When I use print() on a dictionary in Swift, it comes out nice and pretty in the console, with a key and a value.

object = Optional({
customerId = 111;
transactionId = 333;
extraId = 444;
})

当我运行 po

▿ Optional<Any>
▿ some : 3 elements
▿ 0 : 2 elements
  ▿ .0 : transactionId
  - .1 : 333
▿ 1 : 2 elements
  ▿ .0 : customerId
  - .1 : 111
▿ 2 : 2 elements
  ▿ .0 : extraId
  - .1 : 444

仅使用 p 会更糟

(Any?) $R8 = some {
  payload_data_0 = 0x0000000170e679c0 {
  Swift._SwiftNativeNSDictionary = {}
  _heapBufferBridged_DoNotUse = 0x0000000170e679d0 {}
  nativeStorage = {
    buffer = 0x00000001703e4300 {
      Swift.ManagedBuffer = {}
    }
    initializedEntries = (values = 0x00000001703e4328, bitCount = 4)
    keys = 0x00000001703e4330
    values = 0x00000001703e4390
    }
  }
  payload_data_1 = 0x0000000000000000
  payload_data_2 = 0x0000000000000000
  instance_type = 0x0000000105ffc3f8
}

我可以在控制台中执行哪些操作以查看我的变量

What can I do in the console to see my variables in a way that I can actually read them without having to sift through all this nonsense?

PS-在这种情况下，我正在打印 Optional< Any> 对象恰好是字典，但与非可选字典相同。

PS - In this case I am printing an Optional<Any> object that happens to be a dictionary, but it's the same with a non-optional Dictionary.

推荐答案

⚠️ （先前）接受的答案仅将字典作为非格式的单行字符串提供，如下所示：

⚠️ The (previously) accepted answer only provided the dictionary as a non-formatted single line string like so:

Optional(["transactionId": 333, "customerId": 111, "extraId": 444])

➡️一旦获得更多密钥和嵌入式对象/字典，就很难阅读。

➡️ As soon as you get more keys and embedded objects/dictionaries it becomes difficult to read.

• 要获得不错的json格式（缩进，换行等），您可以定义一个别名（我将其命名为 pjson ）通过在lldb终端中运行此命令（源）：

• To get a nice json formatting (indentations, newlines, etc) you can define an alias (I named mine pjson) by running this command in your lldb terminal (source):

command regex pjson 's/(.+)/expr print(NSString(string: String(data: try! JSONSerialization.data(withJSONObject: %1, options: .prettyPrinted), encoding: .utf8)!))/'

• 您可能不想每次打开XCode时都重新定义别名，因此运行以下命令将别名定义附加到〜/ .lldbinit ：


• You probably don't want to re-define the alias everytime you open XCode, so run the following command to append the alias definition to ~/.lldbinit:

echo "command regex pjson 's/(.+)/expr print(NSString(string: String(data: try! JSONSerialization.data(withJSONObject: %1, options: .prettyPrinted), encoding: .utf8)!))/'" >> ~/.lldbinit






• 这将创建 pjson 别名：


• This will create the pjson alias which you can use in your lldb terminal in XCode:

pjson object




---




比较以下Swift对象的输出：




let object: Any? = [
    "customerId": 111,
    "transactionId": 333,
    "extraId": 444,
    "embeddedDict": [
        "foo": true
    ]
]

❌输出 po print（data）

❌ Output of po print(data)

Optional(["transactionId": 333, "embeddedDict": ["foo": true], "customerId": 111, "extraId": 444])

✅ pjson

✅ Output of pjson

{
  "transactionId" : 333,
  "embeddedDict" : {
    "foo" : true
  },
  "customerId" : 111,
  "extraId" : 444
}

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