This is a self-contained UIView subclass that renders the text portion of a tweet according to Twitter's guidelines at https://dev.twitter.com/terms/display-guidelines.
It parses the following tweet entities & provides callbacks for tap gestures:
- URLs
- #Hashtags
- User @mentions
- Media links
The callbacks are passed an instance of a WMATweetEntity subclass that contains all of the data you'll need to process the tap according to Twitter's guidelines.
Encoded ampersands (&) are also replaced with a plain "&" character.
Note: this view only renders the tweet text - you're responsible for adding avatars, author names, dates etc. But that's the easy part! Example:
The code should work on iOS 4.0 and above. It might even work on iOS 3.2 (when CoreText was made public), although I haven't tested that at all.
It also supports including in both ARC and non-ARC Xcode projects - you don't have to set any flags, it's all handled via compile-time macros (thanks to John Blanco).
Once you've added the WMATweetView.h & WMATweetView.m files to your Xcode project, you'll need to add a reference to CoreText.framework as well.
Currently, there are two ways to initialise the view:
This is the easiest option - assuming you've got an NSDictionary instance containing the tweet data (i.e. from Twitter's API), you can just pass that to the view's initWithTweet: initialiser.
Contrived example:
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
// Set up window
self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
self.window.backgroundColor = [UIColor whiteColor];
// Get tweet dictionary from JSON - typically, this would come from Twitter's API rather than a resource file...
NSData *tweetData = [NSData dataWithContentsOfFile:[[NSBundle mainBundle] pathForResource:@"tweet" ofType:@"json"]];
NSDictionary *tweet = [NSJSONSerialization JSONObjectWithData:tweetData options:0 error:NULL];
// Build & add tweet view - let's emulate Tweetbot
WMATweetView *tweetView = [[WMATweetView alloc] initWithTweet:tweet frame:CGRectMake(10, 30, 300, 300)];
tweetView.backgroundColor = [UIColor colorWithRed:0.906 green:0.945 blue:0.980 alpha:1.];
tweetView.textColor = [UIColor colorWithRed:0.176 green:0.306 blue:0.431 alpha:1.];
tweetView.textFont = [UIFont systemFontOfSize:12];
tweetView.urlColor = [UIColor colorWithRed:0.153 green:0.431 blue:0.702 alpha:1.];
tweetView.hashtagColor = [UIColor colorWithRed:0.518 green:0.600 blue:0.690 alpha:1.];
tweetView.userMentionColor = [UIColor colorWithRed:0.267 green:0.349 blue:0.427 alpha:1.];
tweetView.userMentionFont = [UIFont boldSystemFontOfSize:12];
[self.window addSubview:tweetView];
// Resize view to encompass text only
[tweetView sizeToFit];
// Add tap gesture handlers for parsed tweet entities
tweetView.urlTapped = ^(WMATweetURLEntity *entity, NSUInteger numberOfTouches)
{
NSLog(@"Tapped entity: %@", entity);
};
tweetView.hashtagTapped = ^(WMATweetHashtagEntity *entity, NSUInteger numberOfTouches)
{
NSLog(@"Tapped entity: %@", entity);
};
tweetView.userMentionTapped = ^(WMATweetUserMentionEntity *entity, NSUInteger numberOfTouches)
{
NSLog(@"Tapped entity: %@", entity);
};
// Go!
[self.window makeKeyAndVisible];
return YES;
}If you're a masochist, you can set the .text and .entities properties manually. You'd probably only want to do this if you didn't have an NSDictionary derived from a call to Twitter's API.
One day, I might do some sort of regex parsing so the manual entity creation isn't required (although you'll miss out on the good stuff that Twitter's API provides - original URLs, display URLs, full names for @mentions etc etc etc).
Example:
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
// Set up window
self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
self.window.backgroundColor = [UIColor whiteColor];
// Build & add tweet view - let's emulate Tweetbot
WMATweetView *tweetView = [[WMATweetView alloc] initWithFrame:CGRectMake(10, 30, 300, 300)];
tweetView.text = @"Tweet with a link http://t.co/dQ06Fbx3, screen name @wemakeapps, #hashtag, more text, another link http://t.co/9GQa6ycA @ZarroBoogs #ios moo";
// Add entities (well, the last two anyway)
NSMutableArray *entities = [NSMutableArray array];
[entities addObject:[WMATweetUserMentionEntity entityWithScreenName:@"ZarroBoogs" name:@"Mark Beaton" idString:@"547490130" start:120 end:131]];
[entities addObject:[WMATweetHashtagEntity entityWithText:@"ios" start:132 end:136]];
tweetView.entities = entities;
tweetView.backgroundColor = [UIColor colorWithRed:0.906 green:0.945 blue:0.980 alpha:1.];
tweetView.textColor = [UIColor colorWithRed:0.176 green:0.306 blue:0.431 alpha:1.];
tweetView.textFont = [UIFont systemFontOfSize:12];
tweetView.urlColor = [UIColor colorWithRed:0.153 green:0.431 blue:0.702 alpha:1.];
tweetView.hashtagColor = [UIColor colorWithRed:0.518 green:0.600 blue:0.690 alpha:1.];
tweetView.userMentionColor = [UIColor colorWithRed:0.267 green:0.349 blue:0.427 alpha:1.];
tweetView.userMentionFont = [UIFont boldSystemFontOfSize:12];
[self.window addSubview:tweetView];
// Resize view to encompass text only
[tweetView sizeToFit];
// Add tap gesture handlers for parsed tweet entities
tweetView.urlTapped = ^(WMATweetURLEntity *entity, NSUInteger numberOfTouches)
{
NSLog(@"Tapped entity: %@", entity);
};
tweetView.hashtagTapped = ^(WMATweetHashtagEntity *entity, NSUInteger numberOfTouches)
{
NSLog(@"Tapped entity: %@", entity);
};
tweetView.userMentionTapped = ^(WMATweetUserMentionEntity *entity, NSUInteger numberOfTouches)
{
NSLog(@"Tapped entity: %@", entity);
};
// Go!
[self.window makeKeyAndVisible];
return YES;
}
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