Delete the array inside the dictionary file, then flashback, delete the specified array element

#import <Foundation/Foundation.h>

#define NSLOG (FORMAT, ...) printf ("%s\n", [[NSString Stringwithformat:format, # #__VA_ARGS__] utf8string])

int main (int argc, const char * argv[]) {

@autoreleasepool {

1. For the string "2015-09-01 08:19:10" operation, output "08:19:10". Two methods of interception are required.

nsstring* str [email protected] "2015-09-01 08:19:10";

The first of these methods

nsstring* str1 = [str substringfromindex:11];

NSLog (@ "%@", str1);

The second method of

Nsrange range = Nsmakerange (11, 8);

nsstring* str2 = [str substringwithrange:range];

NSLog (@ "%@", str2);

/*2. Access the following data in the array:

@[@{@ "name": @ "Chenfong" @ "Age": @ "32"},

@{@ "name": @ "Sun Ming" @ "age": @ "24"},

@{@ "name": @ "Wang Ming" @ "age": @ "12"},

@{@ "name": @ "Lisiek" @ "Age": @ "50"}

]

1) Sort by age (descending), output data

2) Delete "Chenfong" and output data

*/

nsarray* array = @[@{@ "name": @ "Chenfong" @ "Age": @ "32"},

@{@ "name": @ "Sun Ming" @ "age": @ "24"},

@{@ "name": @ "Wang Ming" @ "age": @ "12"},

@{@ "name": @ "Lisiek" @ "Age": @ "50"}

];

nsarray* array2 = [array sortedarrayusingcomparator:^nscomparisonresult (ID obj1, id obj2) {

int object1 = [obj1[@ "Age"]intvalue];

int object2 = [obj2[@ "Age"]intvalue];

if (OBJECT1==OBJECT2)

{

return nsorderedsame;

}

else if (OBJECT1<OBJECT2)

{

return nsordereddescending;

}

Else

{

return nsorderedascending;

}

}];

NSLog (@ "Descending????????????????????????????????????????");

for (id obj in array2)

{

nsdictionary* dic = obj;

NSLog (@ "%@%@", dic[@ "name"],dic[@ "Age"]);

}

nsmutablearray* array3 =[nsmutablearray Arraywitharray:array2];

for (int i =0; i<array3.count;i++)

{

nsdictionary* dic = Array3[i];

if ([dic[@ "name"]isequal:@ "Chenfong"])

{

[Array3 Removeobject:dic];

}

NSLog (@ "%@%@", dic[@ "name"],dic[@ "Age"]);

}

NSLog (@ "????????????????????????????????????????");

for (id obj in array3)

{

nsdictionary* dic = obj;

NSLog (@ "%@%@", dic[@ "name"],dic[@ "Age"]);

}

}

return 0;

}

Delete the array inside the dictionary file, then flashback, delete the specified array element