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我编辑的问题：- 我复制了数组。但问题是当下面的行执行 [mainRestaurantArray removeObjectAtIndex:j]; mainRestaurantArray 的索引是减少的。这将不允许删除正确的索引值

因为它显示了索引超出范围的错误。因为 arrayRestaurantList -31 的总索引和 mainRestaurantArray-25 的总索引（删除重复值后）。

if([arrayRestaurantList count]==[mainRestaurantArray count]){
    BtnMore.hidden=YES;
    TablView.frame=CGRectMake(0,57, 320, 360);
    }   else{
    [mainRestaurantArray removeAllObjects];
    mainRestaurantArray=[[NSMutableArray arrayWithArray:arrayRestaurantList] retain];
    if ([arrayRestaurantList count]>10) {
        for (int i=0;i<[arrayRestaurantList count]-10;i++) {
            NSString *Old_data;
            Old_data=[[arrayRestaurantList objectAtIndex:i] objectForKey:@"Name"];
            NSLog(@"olddata==>%@",Old_data);
            for (int j=[arrayRestaurantList count]-10;j<[arrayRestaurantList count];j++) {              
                NSString *New_data;             
                New_data=[[arrayRestaurantList objectAtIndex:j] objectForKey:@"Name"];
                NSLog(@"olddata==>%@ newdata==>%@",Old_data,New_data);
                if ([New_data isEqualToString:Old_data]) {
                    //BtnMore.hidden=YES;                   
                    [mainRestaurantArray removeObjectAtIndex:j];

                }
            }
        }
    }
    }

我有一个NSMutableArray( mainRestaurantArray)，它是从作为 web 服务响应的数据中填充的。

中的数据mainRestaurantArray如下：-

{
    Address = "Ellisbridge Opposite Parimal Garden Near Doctor House Ahmedabad Gujarat 380006 India (Collegian Restaurant)";
    Image = "";
    Latitude = "23.020119999999999";
    Longitude = "72.556343999999996";
    Name = "Collegian Restaurant";
    "Phone_Number" = "079 26401020";
    url = "";
}
{
    Address = "Ground Floor Aakash Ganga Ellisbridge B/H Gujrat College : Next To Art Palace Ellisbridge Ahmedabad Gujarat 380006 India (TC's Bread Shop)";
    Image = "";
    Latitude = "23.023137999999999";
    Longitude = "72.560096000000001";
    Name = "TC's Bread Shop";
    "Phone_Number" = "079 26568158";
    url = "";
}
{
    Address = "Center Point Panchwati Crossing C G Road Ahmedabad Gujarat 380009 India (Kings Food Factory)";
    Image = "";
    Latitude = "23.022670000000002";
    Longitude = "72.555651999999995";
    Name = "Kings Food Factory";
    "Phone_Number" = "079 4002 1122";
    url = "http://www.kingsfoodfactory.com";
}

即以字典形式。现在有时会发生数据重复。所以我想删除它。我编写了如下代码：

if ([mainRestaurantArray count]>10) {
        for (int i=0;i<[mainRestaurantArray count]-10;i++) {
            NSString *Old_data;
            Old_data=[[mainRestaurantArray objectAtIndex:i] objectForKey:@"Name"];
            NSLog(@"olddata==>%@",Old_data);
            for (int j=[mainRestaurantArray count]-10;j<[mainRestaurantArray count];j++) {              
                NSString *New_data;             
                New_data=[[mainRestaurantArray objectAtIndex:j] objectForKey:@"Name"];
                NSLog(@"olddata==>%@ newdata==>%@",Old_data,New_data);
                if ([New_data isEqualToString:Old_data]) {
                    BtnMore.hidden=YES;
                    TablView.frame=CGRectMake(0,57, 320, 360);
                    [mainRestaurantArray removeObjectAtIndex:j];

                }
            }
        }
    }

但是这段代码中的问题是当我删除引用丢失的值时。所以应用程序崩溃了。任何人都可以帮助我如何删除数据

提前致谢...

4

3 回答 3

5 
 NSArray *cleanedArray = [[NSSet setWithArray:listItems] allObjects];

//listItems 是你的 NSMutableArray 对象。

于 2012-04-12T13:15:43.747 回答
1

您可以为此使用此方法

+(NSMutableArray*)GetFilterData :(NSMutableArray*)array;
{
//Filter duplicate data
NSArray *copy = [array copy];
NSInteger index = [copy count] - 1;
for (id object in [copy reverseObjectEnumerator]) {
    if ([array indexOfObject:object inRange:NSMakeRange(0, index)] != NSNotFound) {
        [array removeObjectAtIndex:index];
    }
    index--;
}
[copy release];
NSLog(@"arr %@",[array description]);
return array;
}
于 2012-09-07T06:35:39.523 回答
0

这是从 NSMutable 数组中删除重复值的代码。.它会为你工作。myArray 是您要删除重复值的可变数组。

for(int j = 0; j < [myArray count]; j++){
    for( k = j+1;k < [myArray count];k++){
        NSString *str1 = [myArray objectAtIndex:j];
        NSString *str2 = [myArray objectAtIndex:k];
        if([str1 isEqualToString:str2])
            [myArray removeObjectAtIndex:k];
    }
}

现在打印你的数组，会看到没有重复的值

于 2012-05-15T09:08:54.763 回答