What is the right way to check for a null string in Objective-C?

Question

I was using this in my iPhone app

if (title == nil) {
    // do something
}

but it throws some exception, and the console shows that the ti

Answer 1

if ([strpass isEqual:[NSNull null]] || strpass==nil || [strpass isEqualToString:@""] || [strpass isEqualToString:@"(null)"] || strpass.length==0 || [strpass isEqualToString:@""])
{
    //string is blank  
}