Question

Hello I got an issue with this

for (NSString* fileName in fileList){
    if ( [fileName rangeOfString:@".png"].location != NSNotFound  ) {
        int x= col*130;



        NSLog(@"add %@", fileName);

        //create dynamically a nice thumbnail 
        UIImage* img = [UIImage imageWithContentsOfFile:
                        [self.documentsDir stringByAppendingPathComponent:fileName]
                        ];

        UIImageView* imgView = [[UIImageView alloc] initWithImage:img];
        imgView.frame = CGRectMake(0, 0, 110, 110);
        imgView.contentMode = UIViewContentModeScaleAspectFill;
        imgView.clipsToBounds = YES;

        UIButton* imgBtn = [UIButton buttonWithType:UIButtonTypeCustom];
        [imgBtn addTarget:self action:@selector(imgPressed:) forControlEvents:UIControlEventTouchUpInside];
        imgBtn.frame = CGRectMake(x, row*130, 120, 120);
        //imgBtn.backgroundColor = [UIColor lightGrayColor];
        [imgBtn addSubview:imgView];

        [self.canvas addSubview:imgBtn];

        [imgView release];


    col++;
        if (x > 760) {
            row++;
            col = 0;
        }
    }

this makes really nice thumbnail, but i want to make it with only files with specific name, so i have problem how to load only the specific name types. like e.g. I have images named …city1,city2,city3, all are types png, and i also have car1,car2 …. also png. But once I want to load only cities and once only cars….

Is there any possibility to load only cities or only cars????

Thanks to all.
I don’t know how to make the exact comparison to string.

I would use something like this
if(filename isequaltoString:@”car%”)

but it doesn’t work.. =(

Answer 1

You already have code to almost handle this…

 if ( [fileName rangeOfString:@".png"].location != NSNotFound  ) 

You just need to check for @”car” or whatever you are looking for, and you can’t just check the location property or NSRange, because if you match at the first character index 0 your test above will fail.

Return Value
An NSRange structure giving the location and length in the receiver of the first occurrence of aString. Returns {NSNotFound, 0} if aString is not found or is empty (@””).

You should check length as well.