Objective-c block method and laughter grammar

#pragma mark-block Syntax

NSLog(@ "========block method 1===========");

[Students sortusingcomparator: ^nscomparisonresult(ID obj1, ID obj2) {

Student *stu1 = (Student *) obj1; the obj1 here is the Student type.

Student *stu2 = (Student *) obj2;

NSLog (@ "%ld", [STU1. Name COMPARE:STU2. Name]);

return [STU1. Name COMPARE:STU2. Name];

}];

NSLog(@ "======= method 2==========");

nscomparator sortbyname = ^Nscomparisonresult (Student *obj1,Student *obj2)

{

return [Obj1. Name compare:obj2. Name];

};

[Students Sortusingcomparator:sortbyname];

NSLog (@ "%@", students);

// age

NSLog(@ "=========age=========");

[Students sortusingcomparator:^nscomparisonresult (Student *obj1, Student *obj2) {

if (obj1. Age > Obj2. Age ) {

return nsordereddescending;

}Else if (obj1. Age < Obj2. Age )

{

return nsorderedascending;

}

return nsorderedsame;

}];

NSLog (@ "%@", students);

// study No.

NSLog(@ "==========num=========");

[Students sortusingcomparator:^nscomparisonresult (Student *obj1, Student *obj2) {

if (obj1. num > Obj2. num) {

return nsordereddescending;

}Else if (obj1. Num < Obj2. num)

{

return nsorderedascending;

}

return nsorderedsame;

}];

NSLog (@ "%@", students);

#pragma mark- lol grammar

laugh Grammar Get string

NSString *str = [[NSString alloc] initwithutf8string:" convert C language to OC string " ];

nsstring *str1 = @ " laughing and laughing Grammar ";

laugh Grammar Get array

Nsarray *arr = [[nsarray alloc] initwithobjects:str,str1, Nil];

Nsarray *arr1 = @[str,str1];

[Arr Objectatindex:0];

ARR[0];

NSLog (@ "%@", arr[1]);

Laugh Grammar get dictionary

NSLog(@ "======= get Dictionary ========");

Nsdictionary *dic = [[Nsdictionary alloc] initwithobjectsandkeys:str,@ "str", str1,@ "str1", nil];

nsdictionary *dic1 = @{@ "str": str,@ "str1": str1};

NSLog (@ "%@", Dic1);

Laugh grammar get value by key

[Dic1 Valueforkey:@ "str1"];

NSLog (@ "%@", dic1[@ "str1"]);

Laugh grammar Get value object

NSNumber *NUM10 = [NSNumber numberwithint:ten];

@10;

@1.2;

NSLog (@ "%@", NUM10);

//Laughter grammar created , are immutable .

}

return 0;

}

Objective-c block method and laughter grammar