oc中NSString,NSArray,NSDictionary常用用法

initWithString,initWithFormat,stringWithString,stringWithFormat

isEqualToString、compare、

substringToIndex不包括该位置的字符

substringFromIndex: 以指定位置开始到最后

substringWithRange: //按照所给出的位置，长度，任意地从字符串中截取子串

appendString，appendFormat，setString，replaceCharactersInRange，rangeOfString，

 

 

arrayWithObjects,arrayWithArray,addObject,

objectAtIndex,removeObjectAtIndex，count

componentsSeparatedByString(字符串分割到数组),

componentsJoinedByString(数组合并到字符串)

objectEnumerator（从前往后）

reverseObjectEnumerator（从后向前）

 

 

initWithObjectsAndKeys，setObject-forKey，removeObjectForKey，objectAtIndex，nextObject

------------------------如下是举例说明------------------------------------------------------------------------------------------------------------

//NSString
 
//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!";
[astring release];
NSLog(@"astring:%@",astring);
//
NSString *astring = [[NSString alloc] init];
NSLog(@"0x%.8x", astring);
astring=@"This is a String!";
NSLog(@"0x%.8x", astring);
[astring release];
NSLog(@"astring:%@",astring);
 
//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 %istring!",i,j]];
NSLog(@"astring:%@",astring);
[astring release];
 
//6、创建临时字符串
NSString *astring;
astring = [NSString stringWithCString:"This is atemporary string"];
NSLog(@"astring:%@",astring);
//
NSString *path = @"astring.text";
NSString *astring = [[NSString alloc]initWithContentsOfFile:path];
NSLog(@"astring:%@",astring);
[astring release];
//
NSString *astring = [[NSString alloc] initWithString:@"Thisis a String!"];
NSLog(@"astring:%@",astring);
NSString *path = @"astring.text"; 
[astring writeToFile: path atomically: YES];
[astring release]; 
 
//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); 
 
//不考虑大小写比较字符串1
NSString *astring01 = @"this is aString!";NSString *astring02 = @"This is a String!";BOOL result= [astring01 caseInsensitiveCompare:astring02] = = NSOrderedSame; NSLog(@"result:%d",result); 
//不考虑大小写比较字符串2
NSString *astring01 = @"this is aString!";
NSString *astring02 = @"This is a String!";
BOOL result= [astring01 compare:astring02options: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。
NSString *string1 = @"A String"; 
NSString *string2 = @"String"; 
NSLog(@"string1:%@",[string1uppercaseString]);
//大写
NSLog(@"string2:%@",[string2lowercaseString]);
//小写
NSLog(@"string2:%@",[string2capitalizedString]);
//首字母大小
//NSString *string1 =@"This is a string";
NSString *string2 = @"string";
NSRangerange = [string1 rangeOfString:string2];
int location = range.location;intleight = range.length;
NSString *astring = [[NSString alloc]initWithString:[NSStringstringWithFormat:@"Location:%i,Leight:%i",location,leight]];
NSLog(@"astring:%@",astring);[astringrelease];
//-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 astring";
NSString *string2 = [string1substringToIndex: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 = [string1substringFromIndex: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 astring";
NSString *string2 = [string1 substringWithRange:NSMakeRange(0,4)];
NSLog(@"string2:%@",string2);
//扩展路径
NSString *Path = @"~/NSData.txt";
NSString*absolutePath = [PathstringByExpandingTildeInPath];
NSLog(@"absolutePath:%@",absolutePath);
NSLog(@"Path:%@",[absolutePathstringByAbbreviatingWithTildeInPath]);
//文件扩展名
NSString *Path = @"~/NSData.txt";
NSLog(@"Extension:%@",[PathpathExtension]);
//stringWithCapacity转变成大写:
NSMutableString *String;String = [NSMutableStringstringWithCapacity:40];
//appendString: and appendFormat追加一个字符串和数字到后面:
NSMutableString *String1 = [[NSMutableString alloc]initWithString:@"This is a NSMutableString"];
//[String1appendString:@", I will be adding some character"];
[String1appendFormat:[NSString stringWithFormat:@"%d",10]];NSLog(@"String1:%@",String1);
//-insertString: atIndex（位置）插入进一个字符串:
NSMutableString *String1 = [[NSMutableString alloc]initWithString:@"This is a NSMutableString"];
[String1insertString:@"Hi! "atIndex:0];NSLog(@"String1:%@",String1);
//-setString把原来初始化的字符串改变为另一个字符串:
NSMutableString *String1 =[[NSMutableString alloc] initWithString:@"This is a NSMutableString"];
[String1setString:@"Hello Word!"];NSLog(@"String1:%@",String1);
//replaceCharactersInRange在哪个位置替换字符串:
NSMutableString *String1 =[[NSMutableString alloc] initWithString:@"This is aNSMutableString"];
[String1 replaceCharactersInRange:NSMakeRange(0, 4)withString:@"That"];
NSLog(@"String1:%@",String1);
//检查字符串是否以另一个字符串开头- (BOOL) hasPrefix: (NSString *) aString;
NSString*String1 = @"NSStringInformation.txt";
[String1hasPrefix:@"NSString"] = = 1 ? NSLog(@"YES") :NSLog(@"NO");
[String1 hasSuffix:@".txt"] = = 1 ?NSLog(@"YES") : NSLog(@"NO");
//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 *array = [[NSArray alloc]initWithObjects:@"One",@"Two",@"Three",@"Four",nil];self.dataArray=
array;[array release];
 
//NsArray
//-(unsigned) Count;数组所包含对象个数；
NSLog(@"self.dataArraycound:%d",[self.dataArray count]);
 
//- (id)objectAtIndex: (unsigned int) index;获取指定索引处的对象;
NSLog(@"self.dataArraycound 2:%@",[self.dataArray objectAtIndex:2]);
 
//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];
[newArrayaddObject: obj];
}
// 
NSLog(@"newArray:%@",newArray);
[newArrayrelease];
 
 
//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 objin oldArray)
{
[newArrayaddObject: obj];
}
// 
NSLog(@"newArray:%@",newArray);
[newArrayrelease]; 
 
 
//Deepcopy
//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);
[newArrayrelease]; 
 
//Copy andsort
//NSMutableArray *newArray = [[NSMutableArray alloc] init];NSArray*oldArray = [NSArrayarrayWithObjects:@"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];}[newArraysortUsingSelector:@selector(compare:)];NSLog(@"newArray:%@",newArray);[newArray release];
//从字符串分割到数组－componentsSeparatedByString:
NSString *string = [[NSStringalloc]initWithString:@"One,Two,Three,Four"];NSLog(@"string:%@",string); NSArray*array = [stringcomponentsSeparatedByString:@","];NSLog(@"array:%@",array);[stringrelease];
//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);
//arrayWithCapacity
NSArray*array;
array = [NSMutableArray arrayWithCapacity:20];
//- (void)addObject: (id) anObject;
//NSMutableArray *array = [NSMutableArrayarrayWithObjects:@"One",@"Two",@"Three",nil];[arrayaddObject:@"Four"];NSLog(@"array:%@",array);
//-(void)removeObjectAtIndex: (unsigned) index; 
//NSMutableArray *array = [NSMutableArrayarrayWithObjects:@"One",@"Two",@"Three",nil];
[arrayremoveObjectAtIndex:1];NSLog(@"array:%@",array);
//-(NSEnumerator *)objectEnumerator;从前向后
//NSMutableArray*array = [NSMutableArrayarrayWithObjects:@"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 = [NSMutableArrayarrayWithObjects:@"One",@"Two",@"Three",nil];
NSEnumerator*enumerator;enumerator = [array reverseObjectEnumerator];
id object;
while(object = [enumerator nextObject]) {NSLog(@"object:%@",object);}
//快速枚举
//NSMutableArray*array = [NSMutableArrayarrayWithObjects:@"One",@"Two",@"Three",nil];
for(NSString*string in array){NSLog(@"string:%@",string);}
//-(id) initWithObjectsAndKeys;
//NSDictionary *dictionary = [[NSDictionaryalloc] initWithObjectsAndKeys:@"One",@"1",@"Two",@"2",@"Three",@"3",nil];
NSString*string = [dictionaryobjectForKey:@"One"];NSLog(@"string:%@",string);NSLog(@"dictionary:%@",dictionary);[dictionaryrelease]

//NSdictionary
//创建
NSMutableDictionary*dictionary = [NSMutableDictionary dictionary];
 
//添加字典
[dictionarysetObject:@"One" forKey:@"1"];
[dictionarysetObject:@"Two" forKey:@"2"];
[dictionarysetObject:@"Three" forKey:@"3"];
[dictionarysetObject:@"Four" forKey:@"4"];
NSLog(@"dictionary:%@",dictionary);
 
//删除指定的字典
[dictionaryremoveObjectForKey:@"3"];
NSLog(@"dictionary:%@",dictionary);
 
//将NSRect放入NSArray中
NSMutableArray*array = [[NSMutableArray alloc] init];
NSValue*value;
CGRectrect = CGRectMake(0, 0, 320, 480); 
value =[NSValue valueWithBytes:&rect objCType:@encode(CGRect)];
[arrayaddObject:value];
NSLog(@"array:%@",array);
 
//从Array中提取
value =[array objectAtIndex:0];
[valuegetValue:&rect];
NSLog(@"value:%@",value);
 
//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([[filenamepathExtension] hasSuffix:@"jpg"]){
[filesaddObject:filename];
}
}
 
//快速枚举
for(NSString*filename in direnum)
{ if([[filenamepathExtension] isEqualToString:@"jpg"]){[filesaddObject:filename];}}NSLog(@"files:%@",files);
//枚举
NSEnumerator*filenum;filenum = [files objectEnumerator];while (filename = [filenumnextObject]) {NSLog(@"filename:%@",filename);}
//快速枚举
for(idobject in files){ NSLog(@"object:%@",object);
}

----如下是详细举例说明----------------------------------------------------

//NSString
 
//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!";
[astring release];
NSLog(@"astring:%@",astring);
//
NSString *astring = [[NSString alloc] init];
NSLog(@"0x%.8x", astring);
astring=@"This is a String!";
NSLog(@"0x%.8x", astring);
[astring release];
NSLog(@"astring:%@",astring);
 
//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 %istring!",i,j]];
NSLog(@"astring:%@",astring);
[astring release];
 
//6、创建临时字符串
NSString *astring;
astring = [NSString stringWithCString:"This is atemporary string"];
NSLog(@"astring:%@",astring);
//
NSString *path = @"astring.text";
NSString *astring = [[NSString alloc]initWithContentsOfFile:path];
NSLog(@"astring:%@",astring);
[astring release];
//
NSString *astring = [[NSString alloc] initWithString:@"Thisis a String!"];
NSLog(@"astring:%@",astring);
NSString *path = @"astring.text"; 
[astring writeToFile: path atomically: YES];
[astring release]; 
 
//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); 
 
//不考虑大小写比较字符串1
NSString *astring01 = @"this is aString!";
NSString *astring02 = @"This is a String!";
BOOL result= [astring01 caseInsensitiveCompare:astring02] = = NSOrderedSame; NSLog(@"result:%d",result); 
//不考虑大小写比较字符串2
NSString *astring01 = @"this is aString!";
NSString *astring02 = @"This is a String!";
BOOL result= [astring01 compare:astring02options: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。
NSString *string1 = @"A String"; 
NSString *string2 = @"String"; 
NSLog(@"string1:%@",[string1uppercaseString]);
//大写NSLog(@"string2:%@",[string2lowercaseString]);
//小写NSLog(@"string2:%@",[string2capitalizedString]);
//首字母大小
//NSString *string1 =@"This is a string";
NSString *string2 = @"string";
NSRangerange = [string1 rangeOfString:string2];
int location = range.location;
intleight = range.length;
NSString *astring = [[NSString alloc]initWithString:[NSStringstringWithFormat:@"Location:%i,Leight:%i",location,leight]];
NSLog(@"astring:%@",astring);
[astringrelease];
//-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 astring";NSString *string2 = [string1substringToIndex: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 = [string1substringFromIndex: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 astring";
NSString *string2 = [string1 substringWithRange:NSMakeRange(0,4)];
NSLog(@"string2:%@",string2);
//扩展路径NSString *Path = @"~/NSData.txt";
NSString*absolutePath = [PathstringByExpandingTildeInPath];
NSLog(@"absolutePath:%@",absolutePath);
NSLog(@"Path:%@",[absolutePathstringByAbbreviatingWithTildeInPath]);
//文件扩展名
NSString *Path = @"~/NSData.txt";NSLog(@"Extension:%@",[PathpathExtension]);
//stringWithCapacity转变成大写:
NSMutableString *String;String = [NSMutableStringstringWithCapacity:40];
//appendString: and appendFormat追加一个字符串和数字到后面:
NSMutableString *String1 = [[NSMutableString alloc]initWithString:@"This is a NSMutableString"];
//[String1appendString:@", I will be adding some character"];
[String1appendFormat:[NSString stringWithFormat:@"%d",10]];NSLog(@"String1:%@",String1);
//-insertString: atIndex（位置）插入进一个字符串:
NSMutableString *String1 = [[NSMutableString alloc]initWithString:@"This is a NSMutableString"];
[String1insertString:@"Hi! "atIndex:0];NSLog(@"String1:%@",String1);
//-setString把原来初始化的字符串改变为另一个字符串:
NSMutableString *String1 =[[NSMutableString alloc] initWithString:@"This is a NSMutableString"];
[String1setString:@"Hello Word!"];NSLog(@"String1:%@",String1);
//replaceCharactersInRange在哪个位置替换字符串:
NSMutableString *String1 =[[NSMutableString alloc] initWithString:@"This is aNSMutableString"];
[String1 replaceCharactersInRange:NSMakeRange(0, 4)withString:@"That"];
NSLog(@"String1:%@",String1);
//检查字符串是否以另一个字符串开头- (BOOL) hasPrefix: (NSString *) aString;
NSString*String1 = @"NSStringInformation.txt";[String1hasPrefix:@"NSString"] = = 1 ? NSLog(@"YES") :
NSLog(@"NO");[String1 hasSuffix:@".txt"] = = 1 ?NSLog(@"YES") : NSLog(@"NO");
//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 *array = [[NSArray alloc]initWithObjects:@"One",@"Two",@"Three",@"Four",nil];self.dataArray= array;[array release];
 
//NsArray
//-(unsigned) Count;数组所包含对象个数；
NSLog(@"self.dataArraycound:%d",[self.dataArray count]);
 
//- (id)objectAtIndex: (unsigned int) index;获取指定索引处的对象;
NSLog(@"self.dataArraycound 2:%@",[self.dataArray objectAtIndex:2]);
 
//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];
[newArrayaddObject: obj];
}
// 
NSLog(@"newArray:%@",newArray);
[newArrayrelease];
 
 
//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 objin oldArray)
{
[newArrayaddObject: obj];
}
// 
NSLog(@"newArray:%@",newArray);
[newArrayrelease]; 
 
 
//Deepcopy
//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);
[newArrayrelease]; 
 
//Copy andsort
//NSMutableArray *newArray = [[NSMutableArray alloc] init];NSArray*oldArray = [NSArrayarrayWithObjects:@"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];}[newArraysortUsingSelector:@selector(compare:)];
NSLog(@"newArray:%@",newArray);[newArray release];
//从字符串分割到数组－componentsSeparatedByString:
NSString *string = [[NSStringalloc]initWithString:@"One,Two,Three,Four"];NSLog(@"string:%@",string); NSArray*array = [stringcomponentsSeparatedByString:@","];NSLog(@"array:%@",array);[stringrelease];
//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);
//NSArray*array;array = [NSMutableArray arrayWithCapacity:20];
//- (void)addObject: (id) anObject;
//NSMutableArray *array = [NSMutableArrayarrayWithObjects:@"One",@"Two",@"Three",nil];[arrayaddObject:@"Four"];NSLog(@"array:%@",array);
//-(void)removeObjectAtIndex: (unsigned) index; 
//NSMutableArray *array = [NSMutableArrayarrayWithObjects:@"One",@"Two",@"Three",nil];
[arrayremoveObjectAtIndex:1];NSLog(@"array:%@",array);
//-(NSEnumerator *)objectEnumerator;从前向后
//NSMutableArray*array = [NSMutableArrayarrayWithObjects:@"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 = [NSMutableArrayarrayWithObjects:@"One",@"Two",@"Three",nil];
NSEnumerator*enumerator;
enumerator = [array reverseObjectEnumerator];
id object;
while(object = [enumerator nextObject]) {NSLog(@"object:%@",object);}
//快速枚举
//NSMutableArray*array = [NSMutableArrayarrayWithObjects:@"One",@"Two",@"Three",nil];for(NSString*string in array){NSLog(@"string:%@",string);}
//-(id) initWithObjectsAndKeys;
//NSDictionary *dictionary = [[NSDictionaryalloc] initWithObjectsAndKeys:@"One",@"1",@"Two",@"2",@"Three",@"3",nil];NSString*string = [dictionaryobjectForKey:@"One"];NSLog(@"string:%@",string);NSLog(@"dictionary:%@",dictionary);[dictionaryrelease];

//NSdictionary
//创建
NSMutableDictionary*dictionary = [NSMutableDictionary dictionary];
 
//添加字典
[dictionarysetObject:@"One" forKey:@"1"];
[dictionarysetObject:@"Two" forKey:@"2"];
[dictionarysetObject:@"Three" forKey:@"3"];
[dictionarysetObject:@"Four" forKey:@"4"];
NSLog(@"dictionary:%@",dictionary);
 
//删除指定的字典
[dictionaryremoveObjectForKey:@"3"];
NSLog(@"dictionary:%@",dictionary);
 
//将NSRect放入NSArray中
NSMutableArray*array = [[NSMutableArray alloc] init];
NSValue*value;
CGRectrect = CGRectMake(0, 0, 320, 480); 
value =[NSValue valueWithBytes:&rect objCType:@encode(CGRect)];
[arrayaddObject:value];
NSLog(@"array:%@",array);
 
//从Array中提取
value =[array objectAtIndex:0];
[valuegetValue:&rect];
NSLog(@"value:%@",value);
 
//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([[filenamepathExtension] hasSuffix:@"jpg"]){
[filesaddObject:filename];
}
}
 
//快速枚举
for(NSString*filename in direnum)
{ if([[filenamepathExtension] isEqualToString:@"jpg"]){[filesaddObject:filename];}}NSLog(@"files:%@",files);
//枚举
NSEnumerator*filenum;filenum = [files objectEnumerator];while (filename = [filenumnextObject]) {NSLog(@"filename:%@",filename);}
//快速枚举
for(idobject in files){ NSLog(@"object:%@",object);
}