Get NSDate Day, Month or Year in Swift 2.0

Looking for Swift 3.0 version? -> Click here 

Well, having recharged batteries after vacation I’m back into coding!

And yet again I was faced with another simple problem: how to get the day, month or year from a date. 

This is the simpler solution I’ve found in Swift 2:

 

//Here I’m creating the calendar instance that we will operate with:

let calendar = NSCalendar.init(calendarIdentifier: NSCalendarIdentifierGregorian)

     

 

//Now asking the calendar what month are we in today’s date:

let currentMonthInt = (calendar?.component(NSCalendarUnit.Month, fromDate: NSDate()))!

       

 

//Now asking the calendar what year are we in today’s date:

let currentYearInt = (calendar?.component(NSCalendarUnit.Year, fromDate: NSDate()))!

 

Note that in my code I used NSDate() as the date, this will return today’s date. Also, instead of month or year you could use any of the NSCalendarUnits to retrieve the relevant unit you’re interested in. 

Hope this proves useful. If you would have any suggestions on how to improve you know where to reach me, @MarcMasVi in Twitter.

 

Marc

Dates & Components in Swift 2.0

Another topic that has been changed in Swift 2.0 is how to work with dates.

I’m digging into this topic for my upcoming app and I’ve found that most documentation on the web refers to Swift 1.2. So here are some snippets to create dates using components:

//CreateDateFromComponents (1st January 2016)

       var newDate = NSDate()

       let newDateComponents: NSDateComponents = NSDateComponents()

       newDateComponents.setValue(1, forComponent: NSCalendarUnit.Day)

       newDateComponents.setValue(1, forComponent: NSCalendarUnit.Month)

       newDateComponents.setValue(2016, forComponent: NSCalendarUnit.Year)

       newDate = NSCalendar.currentCalendar().dateFromComponents(newDateComponents)!

 

//AddToDateFromComponents (1 day, 1 month and 1 year to today)

 

        var newDate = NSDate()

        let newDateComponentsWhereQueryShouldBegin: NSDateComponents = NSDateComponents()

        newDateComponents.setValue(1, forComponent: NSCalendarUnit.Day)

        newDateComponents.setValue(1, forComponent: NSCalendarUnit.Month)

        newDateComponents.setValue(1, forComponent: NSCalendarUnit.Year)

        newDate = NSCalendar.currentCalendar().dateByAddingComponents(newDateComponents, toDate: newDate, options: NSCalendarOptions(rawValue: 0))! 

 

Hope this proves useful. If you would have any suggestions on how to improve you know where to reach me, @MarcMasVi in Twitter.

 

Marc

 

Evaluate string width and return CGFloat (Swift, OSX)

This morning I’ve been working in a Swift function to detect the width of a given text and return a CGFloat. 

I’ve not found that many examples on the web for OSX, so here you have what I’ve done in all of its glory:

func evaluateStringWidth (textToEvaluate: String) -> CGFloat{

    letfont = NSFont.userFontOfSize(NSFont.systemFontSize())

    let attributes = NSDictionary(object: font!, forKey:NSFontAttributeName)

    let sizeOfText = textToEvaluate.sizeWithAttributes((attributes as! [String : AnyObject]))

    

    return sizeOfText.width

}

 

If you would have any suggestions on how to improve you know where to reach me, @MarcMasVi in Twitter.

CSV Parser Swift 2

One of the features I’m adding to an upcoming app is the ability to import CSV files. For that purpose I looked around for code already available (and found several options, see below), however none of them compelled me enough so I decided to create my own. 

The main objective was to make it as simple as possible and, of course, coded in Swift 2. Note however that I’m still learning so if you would have any suggestions / feedback send them my way! Here it is in all of its glory:

//

//  CSVImporter.swift

//  Controller

//

//  Created by Marc on 5/8/15.

//  Copyright (c) 2015 MMV Solucions S.L. All rights reserved.

//

 

import Cocoa

 

class CSVImporter: NSObject {

 

    var columnDelimiter = “,”

    var textDelimiter = “\””

    var rowDelimiter = “\n”

    var doesItHaveHeader = true

    var rowsFromString : Array<String> = []

    var finalParsedCsv : Array<Array<String>> = []

    

    

 

    

    func retrieveCsvFileAndReturnRows(path path: String ) -> Array<Array<String>>? { //Main

        

        let stringToParse: String?

        do{

            stringToParse = try String(contentsOfFile: path, encoding: NSUTF8StringEncoding)

        } catch _ {

            stringToParse = nil

        }

        var unwrappedStringToParse=“”

        

        if (stringToParse == nil) { return nil } else {

            unwrappedStringToParse = stringToParse! }

        

        //Cleaning string

        unwrappedStringToParse = stringToParse!.stringByReplacingOccurrencesOfString(“\r”, withString: “\n”)

        unwrappedStringToParse = unwrappedStringToParse.stringByReplacingOccurrencesOfString(“\n\n”, withString: “\n”)

        

        //Storing by rows

        rowsFromString = unwrappedStringToParse.componentsSeparatedByString(rowDelimiter)

        

        //Removing header

        if (doesItHaveHeader == true){

            rowsFromString.removeAtIndex(0)

        }

        

        //Converting and adding rows

        for iteratorString in rowsFromString {

            

            if(iteratorString.rangeOfString(textDelimiter) != nil){ //We have detected double quotes

                let arrayContainingDoubleQuotes = iteratorString.componentsSeparatedByString(columnDelimiter)

                var newArrayAccountingForQuotes : Array <String> = []

                var tempArrayContainingNewWord : Array <String> = []

                var inDoubleQuoteLoop = false

                var newStringFromSplittedWord = “”

                for stringToTestForDoublequotes in arrayContainingDoubleQuotes{

                    if stringToTestForDoublequotes.rangeOfString(textDelimiter) != nil || inDoubleQuoteLoop == true {

                        if stringToTestForDoublequotes.rangeOfString(textDelimiter) != nil && inDoubleQuoteLoop == false {

                            tempArrayContainingNewWord.append(stringToTestForDoublequotes)

                            inDoubleQuoteLoop = true

                        }else{

                            tempArrayContainingNewWord.append(stringToTestForDoublequotes)

                            newStringFromSplittedWord = “”.join(tempArrayContainingNewWord)

                            newArrayAccountingForQuotes.append(newStringFromSplittedWord)

                            //Maybe add here option to remove “

                            inDoubleQuoteLoop = false

                        }

 

                    }else{ //No double quotes found and not in the middle of text, add to new array

                     newArrayAccountingForQuotes.append(stringToTestForDoublequotes)

                    }

                }

                finalParsedCsv.append(newArrayAccountingForQuotes)

            }else{

                finalParsedCsv.append(iteratorString.componentsSeparatedByString(columnDelimiter))

            }

            

        }

        

        //Final cleaning

        var row = 0

        for iteratorForFinalCleaning in finalParsedCsv{

            var column = 0

            for _ in iteratorForFinalCleaning{

                //Get the text of these coordinates

                var tempStringToRemoveCommas = finalParsedCsv[row][column]

                if (tempStringToRemoveCommas.rangeOfString(textDelimiter) != nil){

                //Do the needed changes into the text

                tempStringToRemoveCommas = tempStringToRemoveCommas.stringByReplacingOccurrencesOfString(textDelimiter, withString: “”)

                //Add result back to the arrayOfParsedContent

                finalParsedCsv[row].insert(tempStringToRemoveCommas, atIndex: column)

                }

                column++

            }

            row++

        }

        

        returnfinalParsedCsv

    }

    

 

}

 

 

Remember I’m still on my Swift beginnings, if you want other options check out SwiftCSV or this post