NSString+NSMutableString+NSValue+NSAraay用法汇总

jopen 10年前

/一、NSString         /*----------------创建字符串的方法----------------*/        //1、创建常量字符串。      NSString *astring = @"This is a String!";          //2、创建空字符串,给予赋值。        NSString *astring = [[NSString alloc] init];      astring = @"This is a String!";      NSLog(@"astring:%@",astring);    [astring release];              //3、在以上方法中,提升速度:initWithString方法        NSString *astring = [[NSString alloc] initWithString:@"This is a String!"];      NSLog(@"astring:%@",astring);      [astring release];            //4、用标准c创建字符串:initWithCString方法        char *Cstring = "This is a String!";      NSString *astring = [[NSString alloc] initWithCString:Cstring];      NSLog(@"astring:%@",astring);      [astring release];            //5、创建格式化字符串:占位符(由一个%加一个字符组成)        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];            //6、创建临时字符串        NSString *astring;      astring = [NSString stringWithCString:"This is a temporary string"];      NSLog(@"astring:%@",astring);              /*----------------从文件读取字符串:initWithContentsOfFile方法 ----------------*/           NSString *path = @"astring.text";      NSString *astring = [[NSString alloc] initWithContentsOfFile:path];      NSLog(@"astring:%@",astring);      [astring release];          /*----------------写字符串到文件:writeToFile方法 ----------------*/             NSString *astring = [[NSString alloc] initWithString:@"This is a String!"];      NSLog(@"astring:%@",astring);      NSString *path = @"astring.text";         [astring writeToFile: path atomically: YES];      [astring release];                 /*---------------- 比较两个字符串----------------*/                //用C比较:strcmp函数        char string1[] = "string!";      char string2[] = "string!";      if(strcmp(string1, string2) = = 0)      {          NSLog(@"1");      }            //isEqualToString方法         NSString *astring01 = @"This is a String!";      NSString *astring02 = @"This is a String!";      BOOL result = [astring01 isEqualToString:astring02];      NSLog(@"result:%d",result);              //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              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)            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)            //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)            //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                              opti*****:NSCaseInsensitiveSearch | NSNumericSearch] = = NSOrderedSame;         NSLog(@"result:%d",result);             //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。          /*----------------改变字符串的大小写----------------*/           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          /*----------------在串中搜索子串 ----------------*/                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];          /*----------------抽取子串 ----------------*/                //-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);              //-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);              //-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);  //快速枚举      //for(NSString *filename in direnum)      //{      //    if([[filename pathExtension] isEqualToString:@"jpg"]){      //        [files addObject:filename];      //    }      //}      NSLog(@"files:%@",files);        //枚举      NSEnumerator *filenum;      filenum = [files objectEnumerator];      while (filename = [filenum nextObject]) {          NSLog(@"filename:%@",filename);      }  @"b",@"a",@"e",@"d",@"c",@"f",@"h",@"g",nil];         NSLog(@"oldArray:%@",oldArray);      NSEnumerator *enumerator;      enumerator = [oldArray objectEnumerator];      id obj;      while(obj = [enumerator nextObject])      {          [newArray addObject: obj];      }      [newArray sortUsingSelector:@selector(compare:)];      NSLog(@"newArray:%@", newArray);      [newArray release];            /*--------------------------- 切分数组------------------------------*/        //从字符串分割到数组- componentsSeparatedByString:      NSString *string = [[NSString alloc] initWithString:@"One,Two,Three,Four"];      NSLog(@"string:%@",string);         NSArray *array = [string componentsSeparatedByString:@","];      NSLog(@"array:%@",array);      [string release];          //从数组合并元素到字符串- componentsJoinedByString:      NSArray *array = [[NSArray alloc] initWithObjects:@"One",@"Two",@"Three",@"Four",nil];      NSString *string = [array componentsJoinedByString:@","];      NSLog(@"string:%@",string);            /************************************************************************       NSMutableArray       *************************************************************************/      /*--------------- 给数组分配容量----------------*/      //NSArray *array;      array = [NSMutableArray arrayWithCapacity:20];            /*-------------- 在数组末尾添加对象----------------*/      //- (void) addObject: (id) anObject;      //NSMutableArray *array = [NSMutableArray arrayWithObjects:      @"One",@"Two",@"Three",nil];      [array addObject:@"Four"];      NSLog(@"array:%@",array);            /*-------------- 删除数组中指定索引处对象----------------*/         //-(void) removeObjectAtIndex: (unsigned) index;         //NSMutableArray *array = [NSMutableArray arrayWithObjects:      @"One",@"Two",@"Three",nil];      [array removeObjectAtIndex:1];      NSLog(@"array:%@",array);            /*------------- 数组枚举---------------*/         //- (NSEnumerator *)objectEnumerator;从前向后      //NSMutableArray *array = [NSMutableArray arrayWithObjects:      @"One",@"Two",@"Three",nil];      NSEnumerator *enumerator;      enumerator = [array objectEnumerator];        id thingie;      while (thingie = [enumerator nextObject]) {          NSLog(@"thingie:%@",thingie);      }          //- (NSEnumerator *)reverseObjectEnumerator;从后向前      //NSMutableArray *array = [NSMutableArray arrayWithObjects:      @"One",@"Two",@"Three",nil];      NSEnumerator *enumerator;      enumerator = [array reverseObjectEnumerator];        id object;      while (object = [enumerator nextObject]) {          NSLog(@"object:%@",object);      }          //快速枚举      //NSMutableArray *array = [NSMutableArray arrayWithObjects:      @"One",@"Two",@"Three",nil];      for(NSString *string in array)      {          NSLog(@"string:%@",string);      }            /*****************************************************************************       NSDictionary       ***************************************************************************/        /*------------------------------------创建字典 ------------------------------------*/      //- (id) initWithObjectsAndKeys;        //NSDictionary *dictionary = [[NSDictionary alloc] initWithObjectsAndKeys:@"One",@"1",@"Two",@"2",@"Three",@"3",nil];      NSString *string = [dictionary objectForKey:@"One"];      NSLog(@"string:%@",string);      NSLog(@"dictionary:%@",dictionary);      [dictionary release];          /********************************************************************************       NSMutableDictionary       ********************************************************************************/        /*------------------------------------创建可变字典 ------------------------------------*/         //创建      NSMutableDictionary *dictionary = [NSMutableDictionary dictionary];        //添加字典      [dictionary setObject:@"One" forKey:@"1"];      [dictionary setObject:@"Two" forKey:@"2"];      [dictionary setObject:@"Three" forKey:@"3"];      [dictionary setObject:@"Four" forKey:@"4"];      NSLog(@"dictionary:%@",dictionary);        //删除指定的字典      [dictionary removeObjectForKey:@"3"];      NSLog(@"dictionary:%@",dictionary);          /******************************************************************************       NSValue(对任何对象进行包装)       ****************************************************************************/        /*--------------------------------将NSRect放入NSArray中 ------------------------------------*/         //将NSRect放入NSArray中      NSMutableArray *array = [[NSMutableArray alloc] init];      NSValue *value;      CGRect rect = CGRectMake(0, 0, 320, 480);         value = [NSValue valueWithBytes:&rect objCType:@encode(CGRect)];      [array addObject:value];      NSLog(@"array:%@",array);        //从Array中 提取      value = [array objectAtIndex:0];      [value getValue:&rect];      NSLog(@"value:%@",value);          /**************************************************************************       从目录搜索扩展名为jpg的文件     *****************************************************************************/        //NSFileManager *fileManager = [NSFileManager defaultManager];      NSString *home;      home = @"../Users/";        NSDirectoryEnumerator *direnum;      direnum = [fileManager enumeratorAtPath: home];        NSMutableArray *files = [[NSMutableArray alloc] init];        //枚举      NSString *filename;      while (filename = [direnum nextObject]) {          if([[filename pathExtension] hasSuffix:@"jpg"]){              [files addObject:filename];          }      }  //扩展路径        NSString *Path = @"~/NSData.txt";      NSString *absolutePath = [Path stringByExpandingTildeInPath];      NSLog(@"absolutePath:%@",absolutePath);      NSLog(@"Path:%@",[absolutePath stringByAbbreviatingWithTildeInPath]);            //文件扩展名      NSString *Path = @"~/NSData.txt";      NSLog(@"Extension:%@",[Path pathExtension]);              /***********************************************************************       NSMutableString       ***********************************************************************/           /*---------------给字符串分配容量----------------*/      //stringWithCapacity:      NSMutableString *String;      String = [NSMutableString stringWithCapacity:40];          /*---------------在已有字符串后面添加字符----------------*/           //appendString: and appendFormat:        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);      */          /*-------- 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);             /*--------在已有字符串后面在所指定的位置中插入给出的字符串------*/        //-insertString: atIndex:      NSMutableString *String1 = [[NSMutableString alloc] initWithString:@"This is a NSMutableString"];      [String1 insertString:@"Hi! " atIndex:0];      NSLog(@"String1:%@",String1);            /*--------将已有的空符串换成其它的字符串------*/        //-setString:      NSMutableString *String1 = [[NSMutableString alloc] initWithString:@"This is a NSMutableString"];      [String1 setString:@"Hello Word!"];      NSLog(@"String1:%@",String1);            /*--------按照所给出的范围,和字符串替换的原有的字符------*/        //-setString:      NSMutableString *String1 = [[NSMutableString alloc] initWithString:@"This is a NSMutableString"];      [String1 replaceCharactersInRange:NSMakeRange(0, 4) withString:@"That"];      NSLog(@"String1:%@",String1);            /*-------------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");        //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;            /**************************************************************************       NSArray    ****************************************************************************/        /*---------------------------创建数组 ------------------------------*/      //NSArray *array = [[NSArray alloc] initWithObjects:      @"One",@"Two",@"Three",@"Four",nil];        self.dataArray = array;      [array release];        //- (unsigned) Count;数组所包含对象个数;      NSLog(@"self.dataArray cound:%d",[self.dataArray count]);        //- (id) objectAtIndex: (unsigned int) index;获取指定索引处的对象;      NSLog(@"self.dataArray cound 2:%@",[self.dataArray objectAtIndex:2]);          /*-------------------------- 从一个数组拷贝数据到另一数组(可变数级)----------------------------*/           //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);        array1 = [NSArray arrayWithArray:array];      NSLog(@"array1:%@",array1);          //Copy        //id obj;      NSMutableArray *newArray = [[NSMutableArray alloc] init];      NSArray *oldArray = [NSArray arrayWithObjects:                           @"a",@"b",@"c",@"d",@"e",@"f",@"g",@"h",nil];        NSLog(@"oldArray:%@",oldArray);      for(int i = 0; i < [oldArray count]; i++)      {                  obj = [[oldArray objectAtIndex:i] copy];          [newArray addObject: obj];      }      //           NSLog(@"newArray:%@", newArray);      [newArray release];          //快速枚举        //NSMutableArray *newArray = [[NSMutableArray alloc] init];      NSArray *oldArray = [NSArray arrayWithObjects:                           @"a",@"b",@"c",@"d",@"e",@"f",@"g",@"h",nil];         NSLog(@"oldArray:%@",oldArray);        for(id obj in oldArray)      {          [newArray addObject: obj];      }      //           NSLog(@"newArray:%@", newArray);      [newArray release];             //Deep copy        //NSMutableArray *newArray = [[NSMutableArray alloc] init];      NSArray *oldArray = [NSArray arrayWithObjects:                           @"a",@"b",@"c",@"d",@"e",@"f",@"g",@"h",nil];         NSLog(@"oldArray:%@",oldArray);         newArray = (NSMutableArray*)CFPropertyListCreateDeepCopy(kCFAllocatorDefault, (CFPropertyListRef)oldArray, kCFPropertyListMutableContainers);      NSLog(@"newArray:%@", newArray);      [newArray release];             //Copy and sort        //NSMutableArray *newArray = [[NSMutableArray alloc] init];      NSArray *oldArray = [NSArray arrayWithObjects: