NSString+NSMutableString+NSValue+NSAraay用法汇总

NSString+NSMutableString+NSValue+NSAraay用法汇总

/*******************************************************************************************

NSString

*******************************************************************************************/

//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

options: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);

//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:

@"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];

}

}

//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);

}