cocoa-touch

问题 iPhone App :How to play Youtube video in app using MPMoviePlayerController for that i write the code: NSString *urlAddress = @"http://www.youtube.com/xyz"; NSLog(@"URL ADDress : %@",urlAddress); //Create a URL object. NSURL *url = [NSURL URLWithString:urlAddress]; movie = [[MPMoviePlayerController alloc] initWithContentURL:url]; movie.scalingMode=MPMovieScalingModeAspectFill; movie.view.frame = CGRectMake(0.0, 0.0, 320.0, 460.0); [self.view addSubview:movie.view]; [movie play]; if i pass the

问题 I'd like to achieve the glow effect on what I believe are UILabels (or maybe a custom control?) in this application called convert. I think the app looks pretty neat and I'm trying to achieve a similar effect for my own application Any help? Best regards david alt text http://www.davidhomes.net/convert.png 回答1: The applicatin seems to have the glow effect only for numbers. That's 10 digits plus a few symbols (".", "+", "-", etc). An easy way to achieve this is to have a different image for

问题 In mac osx (cocoa), It is very easy to make a blank image of a specific size and draw to it off screen: NSImage* image = [[NSImage alloc] initWithSize:NSMakeSize(64,64)]; [image lockFocus]; /* drawing code here */ [image unlockFocus]; However, in iOS (cocoa touch) there does not seem to be equivalent calls for UIImage. I want to use UIImage (or some other equivalent class) to do the same thing. That is, I want to make an explicitly size, initially empty image to which I can draw using calls

问题 In mac osx (cocoa), It is very easy to make a blank image of a specific size and draw to it off screen: NSImage* image = [[NSImage alloc] initWithSize:NSMakeSize(64,64)]; [image lockFocus]; /* drawing code here */ [image unlockFocus]; However, in iOS (cocoa touch) there does not seem to be equivalent calls for UIImage. I want to use UIImage (or some other equivalent class) to do the same thing. That is, I want to make an explicitly size, initially empty image to which I can draw using calls

问题 I have recently started using UICollectionView, and am a bit confused about the UICollectionViewFlowLayout. It would seem that the frames for each cell in the collection view are calculated with equal space between each item. This causes the frames of some of the cells to have fractional positions, which will cause blurry labels and misaligned image pixels and so on. I am surprised to find that there are no questions about this on stack overflow though, which makes me think I am doing

问题 I have recently started using UICollectionView, and am a bit confused about the UICollectionViewFlowLayout. It would seem that the frames for each cell in the collection view are calculated with equal space between each item. This causes the frames of some of the cells to have fractional positions, which will cause blurry labels and misaligned image pixels and so on. I am surprised to find that there are no questions about this on stack overflow though, which makes me think I am doing

问题 All UIWebViews share a single web thread. When one of them is init -ed, removed from superview etc., they will attempt to lock the web thread from the main thread in a blocking fashion, thus temporarily freezing the run loop of the main thread. If the web thread is busy, e.g. while doing a long synchronous XMLHttpRequest , this may block the main thread for a long time. Is there a way to avoid this? If I could modify UIWebView, I'd just make the lock attempt non-blocking, but obviously that's

问题 I have been wondering for a while, after asking different people and without any of them providing what I would call an "at least a bit concrete answer": Question: Where, in an iPhone application should an application keep the references to it's Model Classes (using the MVC approach) ? In iPhone (and Cocoa) applications we have what we call the "App Delegate", which basically start's up our application and inits our controllers, also handles UITouch events. So is the App Delegate a controller

问题 First off, I'm using XCode 4.0.2. Okay, here is my issue. I can build Apple sample program for MFMailComposerViewController and run it in the simulator (I am aware it will not send email, I'm just concerned that it builds). That seems to work fine. HOWEVER, when I try to build in my application I get the following message. ld: warning: ignoring file /Users/lloyd/Projects/iOS/simpleApp/MessageUI.framework/MessageUI, missing required architecture i386 in file Undefined symbols for architecture

问题 following situation: in a TTTableViewController i added some Cells with URLs. they are opening a class with @"tt://photos" for example. this works quite fine. the first thing is, i saw some urls in TT Examples like @"tt/photos/1". is it possible to fetch this "1" in my photos class and say, for example okay, please open picture one, ore is this only another URL that was declared in TTNavigatior to open a specific Class? the other thing is: is it possible to forward an object to the linked