iOS 对时间排序

ios 对时间排序

NSMutableArray *dataArray=[[NSMutableArray alloc]initWithCapacity:0];

NSMutableDictionary *dir=[[NSMutableDictionary alloc]init];

[dir setObject:@"2012-12-02" forKey:@"time"];

[dataArray addObject:dir];

[dir release];

NSMutableDictionary *dir1=[[NSMutableDictionary alloc]init];

[dir1 setObject:@"2012-02-15" forKey:@"time"];

[dataArray addObject:dir1];

[dir1 release];

NSMutableDictionary *dir2=[[NSMutableDictionary alloc]init];

[dir2 setObject:@"2012-03-02" forKey:@"time"];

[dataArray addObject:dir2];

[dir2 release];

NSMutableDictionary *dir3=[[NSMutableDictionary alloc]init];

[dir3 setObject:@"2000-03-02" forKey:@"time"];

[dataArray addObject:dir3];

[dir3 release];

NSMutableDictionary *dir4=[[NSMutableDictionary alloc]init];

[dir4 setObject:@"2112-03-02" forKey:@"time"];

[dataArray addObject:dir4];

[dir4 release];

NSMutableArray *myArray=[[NSMutableArray alloc]initWithCapacity:0];

[myArray addObjectsFromArray:dataArray];

//[myArray release];

[dataArray release];

for (int i=0; i<[myArray count]; i++) {

NSLog(@"排序前----->>%@",[[myArray objectAtIndex:i] objectForKey:@"time"]);

}

NSSortDescriptor*sorter=[[NSSortDescriptor alloc]initWithKey:@"time" ascending:YES];

NSMutableArray *sortDescriptors=[[NSMutableArray alloc]initWithObjects:&sorter count:1];

NSArray *sortArray=[myArray sortedArrayUsingDescriptors:sortDescriptors];

[sorter release];

for (int i=0; i<[sortArray count]; i++) {

NSLog(@"排序后----->>%@",[[sortArray objectAtIndex:i] objectForKey:@"time"]);

}