Question

我编辑过的问题： 我复制了数组。但问题是当下面的行执行时 [mainRestaurantArray removeObjectAtIndex：j]; mainRestaurantArray的索引是reduce.And不允许删除正确的索引值

因为它显示索引超出范围的错误。 Becoz是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），它是根据来自网络服务的响应数据填充的。

mainRestaurantArray中的数据如下： -

{
    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";
}

即字典形式。现在有时候数据会重复。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...

Answer 1

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

// listItems是你的NSMutableArray对象。

Answer 2

您可以将此方法用于此

+(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;
}

Answer 3

以下是从NSMutable Array中删除重复值的代码。。它将适合您。 myArray是你想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];
    }
}

现在打印你的数组并看到没有重复值

从Nsmutablearray + iphone中删除重复值

3 个答案: