Compariosn of distinct pointer types lacks a cast

Question

Hi, this is my code

NSDictionary *dictionary = [self.tableDataSource objectAtIndex:indexPath.row];
    NSArray *Children = [dictionary objectForKey:@"Children"];
    NSArray *Title = [dictionary objectForKey:@"Title"];

if([Children count] == 0) {
    if(Title =="A #1"){
UIImageView *tmp = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"bg2.png"]]; 
        [dvController.detailImage addSubview:tmp]; 
        [tmp release]; 

} i am not able to compare "Title", at if(Title == "A #1") , its giving warning "Compariosn of distinct pointer types lacks a cast" how can i compare Title in if condition. i also tried

if([Title isequalToString:@"A #1"])...but its not working for me.

Sry for unformated question. regards

Answer 1

NSArray *Title = [dictionary objectForKey:@"Title"];

Title is type of NSArray and "A #1" is NSString Compiler is 100% correct as always... you can't compare this two object because they are of distinct type

you might want something like

if([[Title objectAtIndex:0] isEqualToString:@"A #1"]])

OR

NSString  *Title = [dictionary objectForKey:@"Title"];
if([Title isEqualToString:@"A #1"]])

Answer 2

You declared Title as an NSArray*, so it's obviously a different type from a string and can't be compared to a string. (Perhaps this is a typo?)

Perhaps something more like:

NSString myTitleString = (NSString *)[dictionary stringForKey"@"Title"]

if ( [ myTitleString isEqualToString:@"foo") ] ) { ... }

is what you want?

Answer 3

Hello,

If I understand the code, which is a bit hard because of the formatting. You are defining Title as NSArray. If you want to make a string comparison you need an NSString. So you are either declaring "Title" of the wrong type, or you are expecting another array from the dictionary where you have your strings. I would assume it's the first. This should work:

NSString *titleString = [dictionary objectForKey"@"Title"];

if([titleString isEqualToString:@"A #1"]){
}

Answer 4

Your data structure looks weird... what do you want to store in that dictionary?

But as others already said: if Title is of NSArray you won't get true when compared to a string or NSString.

If Title should be of NSString you might call this:

NSString *title = [dict objectForKey:@"Title"];
if ([title isEqualToString:@"my string"]) { /* do it */ }