a) How do I know which instances of a class work with the appearance property? For e.g. since UITableView conforms to the UIAppearance protocol I was thinking I could do something like You look in the header of the class (and the headers of all the superclasses). Any method that has UI_APPEARANCE_SELECTOR next to it … Read more
Update after seeing your edit: A class object responds to respondsToSelector: just fine, as you’re probably aware. In a test application, I can do both of the following without any compiler warnings: NSLog(@”Responds to selector? %i”, [MyObject respondsToSelector:@selector(respondsToSelector:)]); NSLog(@”Responds to selector? %i”, [[MyObject class] respondsToSelector:@selector(respondsToSelector:)]); However, you’ve declared a protocol on your variable, so it … Read more
Even simpler than Andrey Z’s reply: Simply make a bogus tableFooterView in your UITableView class: self.tableFooterView = [UIView new]; // to hide empty cells and Swift: tableFooterView = UIView()
Setting it as the accessoryView is usually the way to go. You can set it up in tableView:cellForRowAtIndexPath: You may want to use target/action to do something when the switch is flipped. Like so: – (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath { switch( [indexPath row] ) { case MY_SWITCH_CELL: { UITableViewCell *aCell = [tableView dequeueReusableCellWithIdentifier:@”SwitchCell”]; if( … Read more
Make sure you have signed out of any production iTunes accounts on the device. I was getting this error on my test phone which was logged in with my actual iTunes account. You cannot test apps using your production iTunes account, hence the error. I just wish Apple provided a better error so as to … Read more
If you look in the iAd sample code from Apple in the basic banner project they have a simple timer: NSTimer *_timer; _timer = [NSTimer scheduledTimerWithTimeInterval:0.1 target:self selector:@selector(timerTick:) userInfo:nil repeats:YES]; and the the method they have – (void)timerTick:(NSTimer *)timer { // Timers are not guaranteed to tick at the nominal rate specified, so this isn’t … Read more
You could simply ignore the invalid certificate if you are not sending any sensitive information. This article describes how you could do that. Here is an example implementation by Alexandre Colucci for one of the methods described in that article. Essentially you want to define a dummy interface just above the @implementation: @interface NSURLRequest (DummyInterface) … Read more
Yes. Subclass UIAlertView and then overload -dismissWithClickedButtonIndex:animated:, e.g. @implementation MyAlertView -(void)dismissWithClickedButtonIndex:(NSInteger)buttonIndex animated:(BOOL)animated { if (buttonIndex should not dismiss the alert) return; [super dismissWithClickedButtonIndex:buttonIndex animated:animated]; } @end Unofficially you can define a -(void)alertSheet:(UIAlertSheet*)sheet buttonClicked:(id)button; method to the delegate which will make it bypass -dismissWithClickedButtonIndex:animated:, but it’s undocumented, so I don’t know whether it’s suitable for you.
Old question, but you can do it now (easily). NSMutableAttributedString *attributedString; attributedString = [[NSMutableAttributedString alloc] initWithString:@”Please get wider”]; [attributedString addAttribute:NSKernAttributeName value:@5 range:NSMakeRange(10, 5)]; [self.label setAttributedText:attributedString]; For Nov 2013, Just to expand on this great answer, here’s some totally typical code. Usually you’d set the font as well. Note in the comments the old-fashioned way using … Read more
I found this bit of code awhile ago (can’t remember who to attribute it to). It’s quite ingenius, using a Category to allow the creation of a mutable array that does no retain/release by backing it with a CFArray with proper callbacks. @implementation NSMutableArray (WeakReferences) + (id)mutableArrayUsingWeakReferences { return [self mutableArrayUsingWeakReferencesWithCapacity:0]; } + (id)mutableArrayUsingWeakReferencesWithCapacity:(NSUInteger)capacity { … Read more