Use dictionary management in OC?

To process the crayons.txt? This information is about color, each of which is the information of the Yan, for example: Almond #EED9C4, the former string is the name of the color color, after the string is the colors of 16 binary? Value, processing? This completes the following requirements:

1, using a dictionary to manage all the Yan, that is, the dictionary is stored in a number of key-value pairs, Yan? The name is key,16. Color values (without #) are value.

2. Remove all keys and arrange them in ascending order.

3. Take out all the value and arrange it according to the sorted key.

4. Use a new dictionary to manage the color, to the Yan? Classification management, namely: "A", "B", "C" ... That is, the dictionary contains multiple key-value pairs, key is 26 characters? The parent, value is an array, an array? The Color object (including name and ColorValue) is stored. You need to create a color class.

First, we create a Color class that Color.h the Declarations section:

@interface color:nsobject{    * _name;     * _value;} -(Instancetype) Initwithname: (NSString *) Name value: (NSString *) value; -(NSString *) getName; -(NSString *) GetValue; @end

color.m Implementation section:

#import "Color.h"@implementationColor-(Instancetype) Initwithname: (NSString *) Name value: (NSString *) value{ Self=[Super Init]; if(self) {_name=name; _value=value; }    returnSelf ;}-(NSString *) getname{return_name;}-(NSString *) getvalue{return_value;}-(NSString *) description{return[NSString stringWithFormat:@"COLOR-%@%@", _name,_value];}@end

We implement the relevant requirements of the topic in the main function:

//reading a string from a documentNSString * datastring = [NSString stringwithcontentsoffile:@"/users/liguoxiang/desktop/product/oc/lesson/homework-06/homework-06/crayons.txt"encoding:nsutf8stringencoding Error:nil]; NSLog (@"%@", datastring); //divide the string into \ n to get all the strings that represent the color, stored in the DataArrayNsarray * DataArray = [datastring componentsseparatedbystring:@"\ n"]; //creates an empty, mutable dictionary that stores key-value pairs that represent colorsNsmutabledictionary * Colordic =[Nsmutabledictionary Dictionarywithcapacity:[dataarray Count]]; //Fast enumeration of DataArray to get a string representing color     for(NSString * colorstringinchDataArray) {                //split colorstring to get the name and color value of the colorNsarray * colorcomponents = [colorstring componentsseparatedbystring:@" #"]; NSString* ColorName = colorcomponents[0]; NSString* ColorValue = colorcomponents[1]; //The name of the color as the key, the color value as value, stored in the dictionary[Colordic setobject:colorvalue forkey:colorname]; }    //after the enumeration is finished, the output manages the dictionary of ColorsNSLog (@"color dic =%@", Colordic); //Create a group dictionaryNsmutabledictionary * Colorgroupdic = [Nsmutabledictionary dictionarywithcapacity: -]; //create an array to take out all key valuesNsarray * Colornamearray =[Colordic AllKeys];  for(inti =0; i < [Colornamearray count]; i + +) {        //Remove the name of the colorNSString * name =Colornamearray[i]; //Remove the value corresponding to the colorNSString * value =[Colordic Objectforkey:name]; //Initial Color ObjectColor * C =[[Color alloc] Initwithname:name Value:value]; //GroupName as the first letter of the colorNSString * groupName = [name Substringtoindex:1]; //remove an array from the corresponding group nameNsmutablearray * Onegroup =[Colorgroupdic Objectforkey:groupname]; //if the input is empty        if(Nil = =Onegroup) {            //adds a color object to the arrayOnegroup =[Nsmutablearray arraywithobject:c]; //then add the array and the group name to the dictionary[Colorgroupdic Setobject:onegroup forkey:groupname]; }Else{            //array is not empty, the description group exists, directly add it can be[Onegroup Addobject:c]; }} NSLog (@"colorgroupdic =%@", colorgroupdic);

About the color document used in the topic (crayons.txt), because I can not upload the project file, I attach it to the reader for easy reading, please paste the user to create text document,

Almond #EED9C4Antique Brass #C88A65Apricot #FDD5B1Aquamarine #71D9E2Asparagus #7BA05BAtomic Tangerine # Ff9966banana Mania #FBE7B2Beaver #926F5BBittersweet #FE6F5EBlack #000000Blizzard Blue #A3E3EDBlue #0066FFBlue Bell #9999CCBlue Green #0095B6Blue Violet #6456B7Brick Red #C62D42Brink Pink #FB 607FBrown #AF593EBurnt Orange #FF7034Burnt Sienna #E97451Cadet Blue #A9B2C3Canary #FFFF99Caribbean Green # 00cc99carnation Pink #FFA6C9Cerise #DA3287Cerulean #02A4D3Chartreuse #FF9966Chestnut #B94E48Copper #DA8A67Cornflower # 93CCEACotton Candy #FFB7D5Cranberry #DB5079Dandelion #FED85DDenim #1560BDDesert Sand #EDC9AFEggplant #614051Electric Lime #CCFF00Fern #63B76CFlesh #FFCBA4Forest Green #5FA777Fuchsia #C154C1Fuzzy wuzzy Brown #C45655Gold #E6BE8 Agoldenrod #FCD667Granny Smith Apple #9DE093Gray #8B8680Green #01A368Green Yellow #F1E788Happy Ever after #6CDA37Hot Magen Ta #FF00CCInch Worm #B0E313Indian Red #B94E48Indigo #4F69C6Jazzberry Jam #A50B5EJungle Green #29AB87Laser Lemon #FFFF66Lav Ender #FBAED2Macaroni and Cheese #FFB97BMagenta #F653A6Magic Mint #AAF0D1Mahogany #CA3435Manatee #8D90A1Mango Tango #E772 00Maroon #C32148Mauvelous #F091A9Melon #FEBAADMidnight Blue #003366Mountain Meadow #1AB385Mulberry #C54B8CNavy Blue #0066CCNeon carrot #FF9933Olive Green #B5B35COrange #FF681FOrchid #E 29cd2outer Space #2D383AOutrageous Orange #FF6037Pacific Blue #009DC4Peach #FFCBA4Periwinkle #C3CDE6Pig Pink #FDD7E4Pine Green #01796FPink Flamingo #FF66FFPlum #843179Prussian Blue #003366Purple Heart #652DC1Purple Mountain's Majesty #9678B6Purple pizzazz #FF00CCRadical Red #FF355ERaw Sienna #D27D46Razzle Dazzle Rose #FF33CCRazzmatazz #E30B5CRed #ED0A3FRed Orange #FF3F34Red Violet #BB3385Robin's Egg Blue #00CCCCRoyal Purple #6B3FA0Salmon #FF91A4Scarlet #FD0E35Screamin'Green #66FF66Sea Green #93DFB8Sepia #9E5B40Shadow #837050Shamrock #33CC99Shocking Pink #FF6FFFSilver #C9C0BBSky Blue #76D7EASpring Green #ECEBBDSunglow #FFCC33Sunset Orange # Fe4c40tan #FA9D5ATickle Me Pink #FC80A5Timberwolf #D9D6CFTorch Red #FD0E35Tropical Rain Forest #00755ETumbleweed #DEA681T Urquoise Blue #6CDAE7Ultra Green #66FF66Ultra Orange #FF6037Ultra Pink #FF6FFFUltra Red #FD5B78Ultra Yellow #FFFF66Unmello W Yellow #FFFF66Violet (purple) #8359A3Violet Red #F7468AVivid Tangerine #FF9980Vivid Violet #803790White #FFFFFFWild Blue Yonder #7A89B8Wild Strawberry #FF3399Wild Watermelon #FD5B78Wisteria #C9A0DCYellow # Fbe870yellow Green #C5E17AYellow Orange #FFAE42

Use dictionary management in OC?