【转】NSString+NSMutableString+NSValue+NSAraay用法汇总
[经验分享] NSString+NSMutableString+NSValue+NSAraay用法汇总
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开发过程中难免遇到字符串操作，下面是CocoaChina为您总结的NSString+NSMutableString+NSValue+NSAraay用法汇总，帮您应对各种字符串操作。
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//一、NSString ? ?
?? ?/*----------------创建字符串的方法----------------*/
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?? ?//1、创建常量字符串。
?? ?NSString *astring = @"This is a String!";
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?? ?//2、创建空字符串，给予赋值。
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?? ?NSString *astring = [[NSString alloc] init];
?? ?astring = @"This is a String!";
?? ?NSLog(@"astring:%@",astring);
??[astring release];
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?? ?//3、在以上方法中，提升速度:initWithString方法
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?? ?NSString *astring = [[NSString alloc] initWithString:@"This is a String!"];
?? ?NSLog(@"astring:%@",astring);
?? ?[astring release];
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?? ?//4、用标准c创建字符串:initWithCString方法
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?? ?char *Cstring = "This is a String!";
?? ?NSString *astring = [[NSString alloc] initWithCString:Cstring];
?? ?NSLog(@"astring:%@",astring);
?? ?[astring release];
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?? ?//5、创建格式化字符串:占位符（由一个%加一个字符组成）
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?? ?int i = 1;
?? ?int j = 2;
?? ?NSString *astring = [[NSString alloc] initWithString:[NSString stringWithFormat:@"%d.This is %i string!",i,j]];
?? ?NSLog(@"astring:%@",astring);
?? ?[astring release];
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?? ?//6、创建临时字符串
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?? ?NSString *astring;
?? ?astring = [NSString stringWithCString:"This is a temporary string"];
?? ?NSLog(@"astring:%@",astring);
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?? ?/*----------------从文件读取字符串:initWithContentsOfFile方法 ----------------*/ ? ?
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?? ?NSString *path = @"astring.text";
?? ?NSString *astring = [[NSString alloc] initWithContentsOfFile:path];
?? ?NSLog(@"astring:%@",astring);
?? ?[astring release];
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?? ?/*----------------写字符串到文件:writeToFile方法 ----------------*/ ? ?
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?? ?NSString *astring = [[NSString alloc] initWithString:@"This is a String!"];
?? ?NSLog(@"astring:%@",astring);
?? ?NSString *path = @"astring.text"; ? ?
?? ?[astring writeToFile: path atomically: YES];
?? ?[astring release]; ? ?
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?? ?/*---------------- 比较两个字符串----------------*/ ? ? ? ?
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?? ?//用C比较:strcmp函数
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?? ?char string1[] = "string!";
?? ?char string2[] = "string!";
?? ?if(strcmp(string1, string2) = = 0)
?? ?{
?? ? ? ?NSLog(@"1");
?? ?}
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?? ?//isEqualToString方法 ? ?
?? ?NSString *astring01 = @"This is a String!";
?? ?NSString *astring02 = @"This is a String!";
?? ?BOOL result = [astring01 isEqualToString:astring02];
?? ?NSLog(@"result:%d",result);
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?? ?//compare方法(comparer返回的三种值) ? ?
?? ?NSString *astring01 = @"This is a String!";
?? ?NSString *astring02 = @"This is a String!"; ? ?
?? ?BOOL result = [astring01 compare:astring02] = = NSOrderedSame; ? ?
?? ?NSLog(@"result:%d",result); ? ?
?? ?//NSOrderedSame 判断两者内容是否相同
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?? ?NSString *astring01 = @"This is a String!";
?? ?NSString *astring02 = @"this is a String!";
?? ?BOOL result = [astring01 compare:astring02] = = NSOrderedAscending; ? ?
?? ?NSLog(@"result:%d",result);
?? ?//NSOrderedAscending 判断两对象值的大小(按字母顺序进行比较，astring02大于astring01为真)
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?? ?NSString *astring01 = @"this is a String!";
?? ?NSString *astring02 = @"This is a String!";
?? ?BOOL result = [astring01 compare:astring02] = = NSOrderedDescending; ? ?
?? ?NSLog(@"result:%d",result); ? ??
?? ?//NSOrderedDescending 判断两对象值的大小(按字母顺序进行比较，astring02小于astring01为真)
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?? ?//不考虑大 小写比较字符串1
?? ?NSString *astring01 = @"this is a String!";
?? ?NSString *astring02 = @"This is a String!";
?? ?BOOL result = [astring01 caseInsensitiveCompare:astring02] = = NSOrderedSame; ? ?
?? ?NSLog(@"result:%d",result); ? ??
?? ?//NSOrderedDescending判断两对象值的大小(按字母顺序进行比较，astring02小于astring01为 真)
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?? ?//不考虑大小写比较字符串2
?? ?NSString *astring01 = @"this is a String!";
?? ?NSString *astring02 = @"This is a String!";
?? ?BOOL result = [astring01 compare:astring02
?? ? ? ? ? ? ? ? ? ? ? ? ? ?options:NSCaseInsensitiveSearch | NSNumericSearch] = = NSOrderedSame; ? ?
?? ?NSLog(@"result:%d",result); ? ??
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?? ?//NSCaseInsensitiveSearch:不区分大小写比较 NSLiteralSearch:进行完全比较，区分大小写 NSNumericSearch:比较字符串的字符个数，而不是字符值。
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?? ?/*----------------改变字符串的大小写----------------*/ ? ?
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?? ?NSString *string1 = @"A String";?
?? ?NSString *string2 = @"String";?
?? ?NSLog(@"string1:%@",[string1 uppercaseString]);//大写
?? ?NSLog(@"string2:%@",[string2 lowercaseString]);//小写
?? ?NSLog(@"string2:%@",[string2 capitalizedString]);//首字母大小
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?? ?/*----------------在串中搜索子串 ----------------*/ ? ? ? ?
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?? ?NSString *string1 = @"This is a string";
?? ?NSString *string2 = @"string";
?? ?NSRange range = [string1 rangeOfString:string2];
?? ?int location = range.location;
?? ?int leight = range.length;
?? ?NSString *astring = [[NSString alloc] initWithString:[NSString stringWithFormat:@"Location:%i,Leight:%i",location,leight]];
?? ?NSLog(@"astring:%@",astring);
?? ?[astring release];
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?? ?/*----------------抽取子串 ----------------*/ ? ? ? ?
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?? ?//-substringToIndex: 从字符串的开头一直截取到指定的位置，但不包括该位置的字符
?? ?NSString *string1 = @"This is a string";
?? ?NSString *string2 = [string1 substringToIndex:3];
?? ?NSLog(@"string2:%@",string2);
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?? ?//-substringFromIndex: 以指定位置开始（包括指定位置的字符），并包括之后的全部字符
?? ?NSString *string1 = @"This is a string";
?? ?NSString *string2 = [string1 substringFromIndex:3];
?? ?NSLog(@"string2:%@",string2);
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?? ?//-substringWithRange: //按照所给出的位置，长度，任意地从字符串中截取子串
?? ?NSString *string1 = @"This is a string";
?? ?NSString *string2 = [string1 substringWithRange:NSMakeRange(0, 4)];
?? ?NSLog(@"string2:%@",string2);
//***************************************************
//扩展路径
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?? ?NSString *Path = @"~/NSData.txt";
?? ?NSString *absolutePath = [Path stringByExpandingTildeInPath];
?? ?NSLog(@"absolutePath:%@",absolutePath);
?? ?NSLog(@"Path:%@",[absolutePath stringByAbbreviatingWithTildeInPath]);
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?? ?//文件扩展名
?? ?NSString *Path = @"~/NSData.txt";
?? ?NSLog(@"Extension:%@",[Path pathExtension]);
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?? ?/*******************************************************************************************
?? ? NSMutableString
?? ? *******************************************************************************************/ ? ?
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?? ?/*---------------给字符串分配容量----------------*/
?? ?//stringWithCapacity:
?? ?NSMutableString *String;
?? ?String = [NSMutableString stringWithCapacity:40];
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?? ?/*---------------在已有字符串后面添加字符----------------*/ ? ?
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?? ?//appendString: and appendFormat:
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?? ?NSMutableString *String1 = [[NSMutableString alloc] initWithString:@"This is a NSMutableString"];
?? ?//[String1 appendString:@", I will be adding some character"];
?? ?[String1 appendFormat:[NSString stringWithFormat:@", I will be adding some character"]];
?? ?NSLog(@"String1:%@",String1);
?? ?*/
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?? ?/*-------- 在已有字符串中按照所给出范围和长度删除字符------*/ ? ?
?? ?/*
?? ? //deleteCharactersInRange:
?? ? NSMutableString *String1 = [[NSMutableString alloc] initWithString:@"This is a NSMutableString"];
?? ? [String1 deleteCharactersInRange:NSMakeRange(0, 5)];
?? ? NSLog(@"String1:%@",String1);
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?? ? /*--------在已有字符串后面在所指定的位置中插入给出的字符串------*/
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?? ?//-insertString: atIndex:
?? ?NSMutableString *String1 = [[NSMutableString alloc] initWithString:@"This is a NSMutableString"];
?? ?[String1 insertString:@"Hi! " atIndex:0];
?? ?NSLog(@"String1:%@",String1);
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?? ?/*--------将已有的空符串换成其它的字符串------*/
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?? ?//-setString:
?? ?NSMutableString *String1 = [[NSMutableString alloc] initWithString:@"This is a NSMutableString"];
?? ?[String1 setString:@"Hello Word!"];
?? ?NSLog(@"String1:%@",String1);
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?? ?/*--------按照所给出的范围，和字符串替换的原有的字符------*/
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?? ?//-setString:
?? ?NSMutableString *String1 = [[NSMutableString alloc] initWithString:@"This is a NSMutableString"];
?? ?[String1 replaceCharactersInRange:NSMakeRange(0, 4) withString:@"That"];
?? ?NSLog(@"String1:%@",String1);
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?? ?/*-------------判断字符串内是否还包含别的字符串(前缀，后缀)-------------*/
?? ?//01： 检查字符串是否以另一个字符串开头- (BOOL) hasPrefix: (NSString *) aString;
?? ?NSString *String1 = @"NSStringInformation.txt";
?? ?[String1 hasPrefix:@"NSString"] = = 1 ? ?NSLog(@"YES") : NSLog(@"NO");
?? ?[String1 hasSuffix:@".txt"] = = 1 ? ?NSLog(@"YES") : NSLog(@"NO");
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?? ?//02： 查找字符串某处是否包含其它字符串 - (NSRange) rangeOfString: (NSString *) aString，这一点前面在串中搜索子串用到过;
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?? ?/*******************************************************************************************
?? ? NSArray
?? ? *******************************************************************************************/
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?? ?/*---------------------------创建数组 ------------------------------*/
?? ?//NSArray *array = [[NSArray alloc] initWithObjects:
?? ?@"One",@"Two",@"Three",@"Four",nil];
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?? ?self.dataArray = array;
?? ?[array release];
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?? ?//- (unsigned) Count;数组所包含对象个数；
?? ?NSLog(@"self.dataArray cound:%d",[self.dataArray count]);
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?? ?//- (id) objectAtIndex: (unsigned int) index;获取指定索引处的对象;
?? ?NSLog(@"self.dataArray cound 2:%@",[self.dataArray objectAtIndex:2]);
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?? ?/*-------------------------- 从一个数组拷贝数据到另一数组(可变数级)----------------------------*/ ? ?
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?? ?//arrayWithArray:
?? ?//NSArray *array1 = [[NSArray alloc] init];
?? ?NSMutableArray *MutableArray = [[NSMutableArray alloc] init];
?? ?NSArray *array = [NSArray arrayWithObjects:
?? ? ? ? ? ? ? ? ? ? ?@"a",@"b",@"c",nil];
?? ?NSLog(@"array:%@",array);
?? ?MutableArray = [NSMutableArray arrayWithArray:array];
?? ?NSLog(@"MutableArray:%@",MutableArray);
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?? ?array1 = [NSArray arrayWithArray:array];
?? ?NSLog(@"array1:%@",array1);
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?? ?//Copy
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?? ?//id obj;
?? ?NSMutableArray *newArray = [[NSMutableArray alloc] init];
?? ?NSArray *oldArray = [NSArray arrayWithObjects:
?? ? ? ? ? ? ? ? ? ? ? ? @"a",@"b",@"c",@"d",@"e",@"f",@"g",@"h",nil];
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?? ?NSLog(@"oldArray:%@",oldArray);
?? ?for(int i = 0; i?
不错，谢谢版主收集