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[英]Objective-C NSMutableArray: Problem with sorting objects?
[英]Problem in sorting of Nsdictionary array in objective-c
我必須使用特定鍵“likecount”按降序對我的數組“數組”進行排序。 我已經寫了下面的代碼,我發現沒有發生任何變化。 這意味着排序沒有執行。 我在下面提到了我的控制台 output。
for (NSDictionary *wallText in wallvalue) {
NSString *wallNameValue = [wallText objectForKey:@"message"];
if(![[NSNull null] isEqual:wallNameValue] && [wallNameValue length])
{
[tableList addObject:wallNameValue];
NSLog(@" Count Like %@",[likeCount objectAtIndex:i]);
dict = [NSDictionary dictionaryWithObjectsAndKeys: @"message", wallNameValue, @"likecount", [likeCount objectAtIndex:i], nil];
[array addObject:dict];
NSLog(wallNameValue);
}
i++;
}
NSSortDescriptor *descriptors=[[[NSSortDescriptor alloc]initWithKey:@"likecount" ascending:YES]autorelease];
NSArray *sortdescriptor=[NSArray arrayWithObject:descriptors];
NSArray *sortedarray=[array sortedArrayUsingDescriptors:sortdescriptor];
NSLog(@"source sorting id key is %@",sortedarray);
NSLog(@"source s@@@@@@ id key is %@",array);
Output 程序
source id key is (
{
2 = likecount;
"This wall post is not from application. Direct from website." = message;
},
{
0 = likecount;
"New integration" = message;
},
{
1 = likecount;
"This is beta testing.. yes" = message;
},
{
2 = likecount;
"hello wall testing.." = message;
}
)
您以錯誤的順序聲明了對象和鍵。 它應該是,
dict = [NSDictionary dictionaryWithObjectsAndKeys: wallNameValue, @"message", [likeCount objectAtIndex:i], @"likecount", nil];
這就是它不排序的原因。
你的鑰匙和價值觀是錯誤的。 @"likecount"
是值,數字是鍵。
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