NSMutalbleArray中的本地搜索

Question

我想在NSMutalbleArray中搜索，我的代码是：

    arrCelebs=[[NSMutableArray alloc] initWithObjects:@"Test 1",@"Test 2",@"Test 42",@"Test 5", nil];

    - (BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string {

    NSString *arrString1 = txtSearch.text;
    NSRange tmprange;
    for(NSString *string in arrCelebs) {
            tmprange = [arrString1 rangeOfString:string];
            if (tmprange.location != NSNotFound) {
                     NSLog(@"String found");
                    break;
            }
    }
    return YES;
    }

如果我输入"t“，那么它将搜索所有数据，我想将其添加到另一个数组中。用于在表视图中显示。

Answer 1

您可以使用NSPredicate的强大功能

NSPredicate *predicate = [NSPredicate predicateWithFormat:@"SELF BEGINSWITH[c] %@", textField.text];
NSArray *filteredArray = [arrCelebs filteredArrayUsingPredicate:predicate];

Answer 2

通过使用谓词，您可以轻松高效地获得结果。

- (BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string {

    NSPredicate *predicate = [NSPredicate predicateWithFormat:@"SELF beginswith[c] %@",  txtSearch.text];
    NSArray *ResultArray = [yourArray filteredArrayUsingPredicate:predicate];
    return YES;
}

Answer 3

尝试：

arr_NewArray  = [[NSMutableArray alloc] init];

for (int i = 0; i < [arr_YourArrayToSearch count]; i++)
{
     NSString *curString = [string lowercaseString];
     NSString *curStringInArray = [[arr_YourArrayToSearch objectAtIndex:i]lowercaseString];

     if (![curString rangeOfString:curStringSmall].location == NSNotFound)
     {
          [arr_NewArray addObject:[arr_YourArrayToSearch objectAtIndex:i]];
     }
 }

arr_NewArray将为您提供包含与搜索字符串匹配的数据的数组。