Foundation framework--sort instances of content in arrays

In the Person class

@property(nonatomic,strong)nsstring * name;

@property(nonatomic ,strong)nsstring *year;

@property(nonatomic,assign)int age ;

-(ID) initwithname: (nsstring *) name Andyear: (nsstring *) Year Andage: (int.) age;

person.m

-(nsstring *) description

{

return [nsstringstringwithformat:@ "name=%@,year= %@,age=%d ",_name,_year,_age];

}

Initialization

-(ID) initwithname: (nsstring *) name Andyear: (nsstring *) Year Andage: (int.) Age

{

if ( self =[superinit])

{

_name=name;

_year=year;

_age=age;

}

return self;

}

in the main function, do the following:

//1. The array is stored in the order in which the data is deposited.

nsarray *array=@[@ "B",@ "D",@ "1",@ "A",@ " Z ",@" 2 "];

NSLog (@ " sort before array%@", array);

array= [Arraysortedarrayusingselector:@selector(compare:)];

NSLog (@ " sort after array%@", array);

//2. Sort using block mode.

nsarray *array1=@[@ "z",@ "4",@ "3",@ "x"];

NSLog (@ "Array1 %@ before sorting ", array1);

Array1 =[array1sortedarrayusingcomparator: ^nscomparisonresult(ID obj1,ID obj2 ) {

Nscomparisonresult rersult=[obj1 Compare:obj2];

return rersult;

return [Obj1 Compare: Obj2];

}];

NSLog (@ "Array1 %@ after sorting ", array1);

//3. Sorting of custom objects, sorting by attributes

person *p=[[personalloc]initwithname: c10>@ "Jack"andyear:@ "1990"andage:];

        person *p1=[[ person alloc ] initwithname : @ "Tom" andyear : @ "" " andage: 21 ];

        person *p2=[[ person alloc ] initwithname : @ "Hoo" andyear: @ "1908" andage: 18 ];

person *p3=[[personalloc]initwithname: c8>@ "Hoo1"andyear:@ "1907"andage:];

nsarray *array2=@[p,p1,p2,p3];

NSLog (@ " sort before array2%@", array2);

        nssortdescriptor *d1=[ Nssortdescriptor sortdescriptorwithkey Span style= "COLOR: #000000" >: @ "Age" ascending : yes ];

nssortdescriptor *d2=[nssortdescriptorsortdescriptorwithkey:@ " Year "ascending:YES";

nsarray *descripts=@[d1,d2];

Array2 =[array2sortedarrayusingdescriptors:d escripts];

NSLog (@ " array2%@ after sorting ", array2);

//4. Block method Ordering for custom objects

nsarray *array4=@[p,p1,p2,p3];

NSLog (@ "Array4 %@ before sorting ", Array4);

Array4=[array4sortedarrayusingcomparator: ^nscomparisonresult(ID obj1,ID OBJ2) {

person *p1=obj1;

person *p2=obj2;

return [P1. Year Compare:p 2. Year];

}];

NSLog (@ "Array4 %@ after sorting ", Array4);

Foundation framework--sort instances of content in arrays