NSString

1. 建立
   NSString *[email protected]”test”;
   NSString *str1=[[NSString alloc]initWithString:str];
   NSString *str2=[[NSString alloc]initWithUTF8String:”test”];
   NSString *str3=[[NSString alloc]initWithFormat:@”str1”];
2. 比較 isEqualToString
   BOOL result= [str isEqualToString；str1];
   NSLog(@”結果是%d”,result);
3. 查詢字串 rangeOfString:
   NSString *[email protected]”u a the A o “;
   NSString *[email protected]”the”;
   NSRange range=[str7 rangeOfString:str8];
   NSLog(@”%lu %lu”,range.location,range.length);//——>結果是4 3
4. 擷取
   NSSting *[email protected]”0123456789”;
   //從頭開始擷取到指定的位置
   NSString *str1=[str substringToIndex:6];//——>結果是012345
   //從指定的位置（不包括指定的位置）開始擷取到最後一位
   NSString *str2=[str substringFromIndex:6];//——>結果是6789
   //從第幾位開始（不包括指定位置）擷取幾位
   NSString *str3=[str substringWithRange:NSMakeRange(3,4)];//——>結果是3456
5. 大小寫轉化
   NSString *[email protected]”I Love You”;
   NSString *strUpperCase=[string uppercaseString];//——>結果是I LOVE YOU
   NSString *strLowerCase=[string lowercaseString];//——>結果是i love you

NSMutableString
-(void)createNSMutableString
{
NSString *[email protected]”test”;
NSMutableString *mutableStr=[NSMutableString stringWithString:str];
//修改
[mutableStr setString:@”update”];
NSLog(@”%@”,mutableStr); //——>結果是update
//追加
[mutableStr appendString:@”str”];
NSLog(@”%@”,mutableStr); //——>結果是updatestr
[mutableStr appendFormat:@”str%@”,str];
NSLog(@”%@”,mutableStr); //——>結果是updatestrstrtest
//插入
[mutableStr insertString:@”insert” atIndex:4];
NSLog(@”%@”,mutableStr); //——>結果是updainserttestrstrtes
//修改
[mutableStr replaceCharactersInRange:NSMakeRange(1, 1) withString:@”K”];
NSLog(@”%@”,mutableStr); //——>結果是uKdainserttestrstrtes
//刪除
[mutableStr deleteCharactersInRange:NSMakeRange(1, 1)];
NSLog(@”%@”,mutableStr); //——>結果是udainserttestrstrtes
}

NSArray

-(void)createArray
{
//建立陣列
NSArray *array=[[NSArray alloc]initWithObjects:@”one”,@”two”,@”three”, nil];
NSArray *array1=[array arrayWithObjects:@”one”,@”two”,@”three”, nil];
NSArray *[email protected][@”one”,@”two”,@”three”];
NSLog(@”%@ %@ %@”,array,array1,array2);

//遍歷陣列
//for-in
id obj;
for(obj in array)
{
NSLog(@”obj====%@”,obj);
}
//用列舉器遍歷
NSEnumerator *enumerator=[array objectEnumerator];
while(obj=[enumerator nextObject])
{
NSLog(@”obj====%@”,obj);
}
//用列舉器逆序遍歷
NSEnumerator *enumerator1=[array reverseObjectEnumerator];
while（obj=[enumerator nextObject]）
{
NSLog(@”obj====%@”,obj);
}
}

NSMutableArray

-(void)createMutable
{
NSMutableArray *array=[[NSMutableArray alloc]init];
//新增元素
[array addObject:@”one”];
[array addObject:@”two”];
[ array addObject:@”three”];

//NSString 與 NSArray 互轉
NSString *[email protected]"1,2,3,4,5";
NSArray *arr=[str componentsSeparatedByString:@","];
NSLog(@"%@",arr);

NSString *str1=[arr componentsJoinedByString:@"!"];
NSLog(@"str1==%@",str1);

}
NSDictionary
-(void)createNSDictionary
{
//建立字典
NSDictionary *dict=[[NSDictionary alloc]initWithObjectsAndKeys:@”one”,@”1”,@”two”,@”2”,@”three”,@”3” ,nil];
NSDictionary *dict1=[NSDictionary dictionaryWithObjectsAndKeys:@”one”,@”1”,@”two”,@”2”,@”three”,@”3” ,nil];
NSDictionary *[email protected]{@”one”:@”1”,@”two”:@”2”,@”three”:@”3”}; //注意這是新特性，字典是@{}，陣列的是@[];
NSLog(@”dict–%@ %@ %@”,dict,dict1,dict2);

id obj;
for (obj in dict) {
    //key
    NSLog(@"obj===%@",obj);
    //value
    NSLog(@"value====%@",[dict objectForKey:obj]);
}
//value
NSEnumerator *enumerator=[dict objectEnumerator];
while (obj=[enumerator nextObject]) {
    NSLog(@"obj enum======%@",obj);
}
//key
NSEnumerator *enumerator1=[dict keyEnumerator];
while (obj=[enumerator1 nextObject]) {
    NSLog(@"obj eunm1======%@",obj);
}

}

NSMutableDictionary
-(void)createMutableDictionary
{
//建立
NSMutableDictionary *dict=[[NSMutableDictionary alloc]init];
//新增
[dict setValue:@”value1” forKey:@”key1”];
[dict setValue:@”value2” forKey:@”key2”];
[dict setValue:@”value3” forKey:@”key3”];
[dict setValue:@”value4” forKey:@”key4”];
NSLog(@”dict===%@”,dict);

//刪除
[dict removeObjectForKey:@"key3"];
 NSLog(@"dict===%@",dict);

//2種都可以，但是valueForKey在[email protected]"@key"情況下,系統會把@符號去掉，這樣會crash，建議用objectForKey
NSLog(@"value====%@",[dict objectForKey:@"key2"]);
NSLog(@"value====%@",[dict valueForKey:@"key2"]);

NSLog(@"all key==%@",[dict allKeys]);
NSLog(@"all value==%@",[dict allValues]);  

}
NSSet
-(void)createNSSet
{
//建立
NSSet *set=[[NSSet alloc]initWithObjects:@”one”,@”two”,@”three”, nil];
NSLog(@”set====%@”,set);

//判斷是否包含某個物件
BOOL judgeSet=[set containsObject:@"three"];
BOOL judgeSet1=[set containsObject:@"Three"];
NSLog(@"bool ===%d  %d",judgeSet,judgeSet1);

//以陣列的形式存放資料
NSArray *[email protected][@"1",@"2",@"3"];
NSSet *set1=[NSSet setWithArray:array];
NSLog(@"%@   %@",array,set1);


NSSet *stu=[[NSSet alloc]initWithObjects:@"25",@"male",@"student" ,nil];
NSSet *stu1=[[NSSet alloc]initWithObjects:@"25",@"male",@"student",@"cool", nil];
NSLog(@"stu count ===%lu",(unsigned long)[stu count]);
//判斷是否包含
if ([stu containsObject:@"cool"]) {
    NSLog(@"include cool");
}
//判斷是否相等
if ([stu isEqualToSet:stu1]) {
    NSLog(@"!=");
}
//判斷是不是其子串
if ([stu isSubsetOfSet:stu1]) {
    NSLog(@"is sub");
}
//遍歷的方法
//1.for-in
id obj;
for (obj in stu1) {
    NSLog(@"%@",obj);
}
//2.列舉器
NSEnumerator *enumerator=[stu1 objectEnumerator];
while (obj=[enumerator nextObject]) {
    NSLog(@"%@",obj);
}

NSArray *stuArray=[stu allObjects];
NSLog(@"set===%@,array===%@",stu1,stuArray);

}
NSMutableSet
-(void)createNSMutableSet
{
//建立
NSMutableSet *set=[[NSMutableSet alloc]init];
[set addObject:@”1”];
[set addObject:@”2”];
[set addObject:@”3”];
[set addObject:@”4”];
[set addObject:@”8”];
NSLog(@”%@”,set);
//移除某個物件
[set removeObject:@”1”];
NSLog(@”%@”,set);
//移除所有物件
[set removeAllObjects];
//NSLog(@”%@”,set);

NSMutableSet *set1=[[NSMutableSet alloc]init];
[set1 addObject:@"1"];
[set1 addObject:@"2"];
[set1 addObject:@"3"];
[set1 addObject:@"4"];
//合併

[set unionSet:set1];
NSLog(@”set==%@ set1==%@”,set,set1);
// 去除
[set minusSet:set1];
NSLog(@”set==%@ set1==%@”,set,set1);
//交集
[set intersectSet:set1];
NSLog(@”set==%@ set1==%@”,set,set1);

}