When work in a project get Errors and how I solve the errors in xcode, Pod, terminal, github, swift code and crash app will be here.


 1. "Pod install" Error

Check this Error screenshot

libc++abi.dylib: terminating with uncaught exception of type NSException
*** Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: 'Mutating a priority from required to not on an installed constraint (or vice-versa) is not supported. You passed priority 500 and the existing priority was 1000.'
terminating with uncaught exception of type NSException
CoreSimulator 776.4 - Device: iPhone 8 (xxxxxx-589A-xxxx-8E6B-xxxxx) - Runtime: iOS 12.4 (16G73) - DeviceType: iPhone 8

try to Debug

Debug
(lldb) po descFirstHeight.priority
▿ UILayoutPriority
- rawValue : 1000.0

(lldb) po descSecondHeight.priority
▿ UILayoutPriority
- rawValue : 500.0

(lldb) po UILayoutPriority.defaultLow
▿ UILayoutPriority
- rawValue : 250.0

(lldb) po UILayoutPriority.defaultHigh
▿ UILayoutPriority
- rawValue : 750.0

(lldb)

Solution
- In XIB dont set (priority = 1000) but you must set (prority = 999)
descFirstHeight =  999
descSecondHeight = 250

- And in file swift 

descFirstHeight.priority = UILayoutPriority.defaultLow // 250

descSecondHeight.priority = UILayoutPriority.defaultHigh // 750

Source: https://stackoverflow.com/a/37474902/8366535

3. In Stackview cannot change color UIView (IOS 12)

Condition when subview in stackview 

example look like this

in phone 8 (IOS 12)

Should be like this
in Iphone 11 (IOS 15)

let see the code Before, it is because in ios 12 the process is slower than ios 15 

//// Code here ///

    private func updateDigitView(_ digitView: UIView, isHighlight: Bool) {

            digitView.backgroundColor = isHighlight ? .cyan : .clear

            

            if let bulletView = digitView.subviews.last {

                bulletView.backgroundColor = isHighlight ? .blue : .clear

                bulletView.layer.borderWidth = isHighlight ? 0 : 1

                bulletView.layer.borderColor = isHighlight ? nil : UIColor.cyan.cgColor

            }

    }

//// ----------- ///

SOLUTION

So this my solution can fix that problem use dispatchqueue async

//// Code here ///

 private func updateDigitView(_ digitView: UIView, isHighlight: Bool) {

     DispatchQueue.main.async {

            digitView.backgroundColor = isHighlight ? .cyan : .clear

            

            if let bulletView = digitView.subviews.last {

                bulletView.backgroundColor = isHighlight ? .blue : .clear

                bulletView.layer.borderWidth = isHighlight ? 0 : 1

                bulletView.layer.borderColor = isHighlight ? nil : UIColor.cyan.cgColor

            }

        }

    }

//// ----------- ///

4. Error build after (pod install)

error: The sandbox is not in sync with the Podfile.lock. Run 'pod install' or update your CocoaPods installation.

How to Solve

- clean build/ delete DrivedData

- pod install / pod update (again)

If still an error

- checkout to branch development/master and build app.
- If in branch master not failed back into your branch and build your app again

5. UserDefaults JSON
this example use pod swiftyJson

// set

if let model = JSON["data"].rawString(.utf8, options: .fragmentsAllowed) {

  UserDefaults.standard.setValue(model, forKey: "UserDefaultKey")

 }

//call

guard let status = UserDefaults.standard.string(forKey: "UserDefaultKey"), let data = statusOA.data(using: .utf8) else {

return nil }

6. Nil when passing data Model

When I passing optional data model like this 
example: 

In Model

struct Form: Codable {

var isValue: Bool?

var isUsed: Bool?

enum CodingKeys: String, CodingKey {

case isValue, isUsed

}

init(from decoder: Decoder) throws {

let container = try decoder.container(keyedBy: CodingKeys.self)

isUsed = try container.decodeIfPresent(Bool.self, forKey: .isUsed)

isValue = try container.decodeIfPresent(Bool.self, forKey: .isValue)

}

}

In View Controller

var form: Form?

//When Passing from API Response

.

.

.

form = response?.form

.

.

.

print(form.isValue) // nil

Solution is  create a new request model with parameter

struct FormModel {

struct Request {

var parameters: [String: String]?

public init(isValue: Bool, isUsed: Bool) {

parameters = [

"isValue": "\(isValue)",

"isUsed": "\(isUsed)"

]

}

}

}

/////------/////------/////------/////------/////------

// in viewDidLoad example

form = FormModel.Request(isValue: true, isUsed: false)

// now is not nil

7. Error Need Install `cocoapods-keys`

Not running with Xcode Cloud, setup podfile with cocoapod-keys plugin

[!] Your Podfile requires that the plugin `cocoapods-keys` be installed. Please install it and try installation again.

The problem is my git change from `https` to `ssh` setting so my old version ruby is `2.6.1` update to `3.1.2`

Solution

- delete old `cocoapod-keys-App ` in Keychain access

$arch 

$ruby -v   

$brew     

$brew install rbenv ruby-build

$rbenv install 3.1.2  

$rbenv global 3.1.2    

$open ~/.zshrc  

$ruby -v 

$gem install cocoapods-keys

$gem install cocoapods

$gem install fastlane

$cd app    

$pod install 

8. When Cannot Run "xed ." in terminal  

This Error

app: $xcode-select --install

xcode-select: error: command line tools are already installed, use "Software Update" to install updates

Solution:

xcode-select --install

sudo xcode-select -s /Applications/Xcode.app/Contents/Developersudo xcodebuild -license accept

When use pod alamofire this difference setup `ParameterEncoding` to create serviceApi

 this print in debug area on xcode.

(lldb) po URLEncoding.queryString

▿ URLEncoding

  - destination : Alamofire.URLEncoding.Destination.queryString

  - arrayEncoding : Alamofire.URLEncoding.ArrayEncoding.brackets

  - boolEncoding : Alamofire.URLEncoding.BoolEncoding.numeric



(lldb) po URLEncoding.default

▿ URLEncoding

  - destination : Alamofire.URLEncoding.Destination.methodDependent

  - arrayEncoding : Alamofire.URLEncoding.ArrayEncoding.brackets

  - boolEncoding : Alamofire.URLEncoding.BoolEncoding.numeric



(lldb) po URLEncoding.default.destination

Alamofire.URLEncoding.Destination.methodDependent



(lldb) po URLEncoding.queryString.destination

Alamofire.URLEncoding.Destination.queryString

In order to use a query string in a POST request, you need to change your encoding argument to URLEncoding(destination: .queryString).

  _url = "http://localhost:8080/"
    let parameters: Parameters = [
        "test": "123"
        ]

    Alamofire.request(_url,
                      method: .post,
                      parameters: parameters,
                      encoding: URLEncoding(destination: .queryString),
                      headers: headers)

You can do a simple Alamofire request like this.
import Alamofire
import AlamofireObjectMapper
import ObjectMapper

//
//

Alamofire.request("hello.com", method: .post, parameters: ["name": "alvin"], encoding: JSONEncoding.default, headers: nil).responseObject(completionHandler: { (response : DataResponse<YourModelHere>) in


 })
------------------------------------------------------------
You can see that I have used JSONEncoding in this request. You can choose your way of encoding in there from any of these.
In JSONEncoding
default
Alamofire.request("https://httpbin.org/post", method: .post, parameters: parameters, encoding: JSONEncoding.default)
prettyPrinted
Alamofire.request("https://httpbin.org/post", method: .post, parameters: parameters, encoding: JSONEncoding. prettyPrinted)
And in URLEncoding
default --
Alamofire.request("https://httpbin.org/get", parameters: parameters, encoding: URLEncoding.default)
methodDependent
Alamofire.request("https://httpbin.org/get", parameters: parameters, encoding: URLEncoding(destination: .methodDependent))
queryString
httpBody
Alamofire.request("https://httpbin.org/post", parameters: parameters, encoding: URLEncoding.httpBody)

https://stackoverflow.com/a/43282916/8366535
https://stackoverflow.com/a/39679994/8366535

This My list Git client app :

1. Git-Fork  https://git-fork.com/
Platforms: Linux, Mac, Windows
Price: Free / $49
License: Proprietary

2. Sourcetree https://www.sourcetreeapp.com/

Platforms: Mac, Windows
Price: Free
License: Proprietary

3. Github Desktop  https://desktop.github.com/

Platforms: Mac, Windows
Price: Free
License: MIT

4. GitKraken https://www.gitkraken.com/

Platforms: Linux, Mac, Windows
Price: Free / $29 / $49
License: Proprietary

Here example for check type object you don't what it is:

------------------------------------------------------------------------------------------------

Source: Author use sourcetree

I found a great article how to improve my commit in medium, check this link 
https://betterprogramming.pub/write-better-git-commit-messages-to-increase-your-productivity-89fa773e8375

 Note: How use good commit

• feat: introduce a new feature
• fix: patches a bug in your codebase (bugfix or hotfix)
• build: changes that affect the build system or external dependencies
• chore: updates dependencies and does not relate to fix or feat and does not modify src or test files.
• ci: changes that affect the continuous integration process
• docs: updates the documentation or introduce documentation
• style: updates the formatting of code; remove white spaces, add missing spaces, remove unnecessary newlines
• refactor: reactors code segments to optimize readability without changing behavior
• perf: improve performance
• test: add/remove/update tests
• revert: reverts one or many previous commits