Using objective-c objects with an NSDictionary
- by Mark
I want store a URL against a UILabel so that when a user touches the label it takes them to that URL in a UIWebView.
I have declared a NSDictionary like so:
NSMutableArray *linksArray = [[NSMutableArray alloc] init];
[linksArray addObject: [NSValue valueWithNonretainedObject: newsItem1ReadMoreLabel]];
[linksArray addObject: [NSValue valueWithNonretainedObject: newsItem2ReadMoreLabel]];
[linksArray addObject: [NSValue valueWithNonretainedObject: newsItem3ReadMoreLabel]];
[linksArray addObject: [NSValue valueWithNonretainedObject: newsItem4ReadMoreLabel]];
[linksArray addObject: [NSValue valueWithNonretainedObject: newsItem5ReadMoreLabel]];
//NSString *ageLink = @"http://www.theage.com.au";
NSArray *defaultLinks = [NSArray arrayWithObjects: @"1", @"2", @"3", @"4", @"5", nil];
self.urlToLinkDictionary = [[NSMutableDictionary alloc] init];
self.urlToLinkDictionary = [NSDictionary dictionaryWithObjects:defaultLinks forKeys:linksArray];
Considering I used a NSValue as the key, how do I get/set the URL associated with that key given that I only have references to the UILabels?
this is what I have but it doesn't work:
for(NSValue *key in [self.urlToLinkDictionary allKeys])
{
if ([key nonretainedObjectValue] == linkedLabel)
{
[self.urlToLinkDictionary setValue:[newsItem link] forKey: key];
}
}
but I get an error: "objc_exception_throw" resolved
