When you use NSPrivateQueueConcurrencyType you need to do anything that touches that context or any object belonging to that context inside the -performBlock: method. Your code above is illegal since you’re passing those objects back to the main queue. The new API helps you in solving this, though: You create one context that’s associated with … Read more
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
I was able to recover from this by unplugging the iPad, powering it down and back up, clearing all XCode caches and targets, and doing a clean build. I’m running XCode 3.5.4 and iOS 4.2.1 UPDATE: Same problem running Xcode 4.3 and iOS5 – just power-cycle the device.
If you don’t need any data inbetween drag, than you should simply set: [mySlider setContinuous: NO]; This way you will receive valueChanged event only when the user stops moving the slider. Swift 5 version: mySlider.isContinuous = false
On dynamic cells, rowHeight set on the UITableView always overrides the individual cells’ rowHeight. But on static cells, rowHeight set on individual cells can override UITableView’s. Not sure if it’s a bug, Apple might be intentionally doing this?
So I finally sorted this out! Ugh, what an information scavenger hunt. Anyway, here is the bit in the docs for ExtAudioFile that I missed (see bolded text). I wasn’t setting this property. Data was being written to my .m4a file but it was unreadable at playback. So to sum up: I have a bunch … Read more
With static content in a table view, you do not implement any of the datasource methods (including tableView:cellForRowAtIndexPath:, so you would never dequeue the cells. There is no dequeuing for static content (that you can get involved in, anyway). If you want to get a pointer to a particular cell: get it from the table … Read more
Set email format as HTML. This code is woking fine in my app. MFMailComposeViewController *emailDialog = [[MFMailComposeViewController alloc] init]; NSString *htmlMsg = @”<html><body><p>This is your message</p></body></html>”; NSData *jpegData = UIImageJPEGRepresentation(emailImage, 1.0); NSString *fileName = @”test”; fileName = [fileName stringByAppendingPathExtension:@”jpeg”]; [emailDialog addAttachmentData:jpegData mimeType:@”image/jpeg” fileName:fileName]; emailDialog setSubject:@”email subject”]; [emailDialog setMessageBody:htmlMsg isHTML:YES]; [self presentModalViewController:emailDialog animated:YES]; [emailDialog release]; Swift … Read more
Please try this : Convert Emoji to unicode NSData *data = [strEmo dataUsingEncoding:NSNonLossyASCIIStringEncoding]; NSString *goodValue = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding]; Very easy to convert unicode to Emoji NSData *data = [strEmo dataUsingEncoding:NSUTF8StringEncoding]; NSString *goodValue = [[NSString alloc] initWithData:data encoding:NSNonLossyASCIIStringEncoding];
Click on you project, in the left hand organizer. Select your target, in the next column over. Select the Build Settings tab at the top. Scroll down to “Objective-C Automatic Reference Counting” (it may be listed as “CLANG_ENABLE_OBJC_ARC” under the User-Defined settings group), and set it to NO. This is on Xcode 4.2 (Build 4D199).