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问题 I'm working on an app that is supposed to be universal, one app for both iPad and iPhone. I would like to keep their interfaces as similar as possible. In the iPhone app I am using a Tab bar controller, and one of those tabs goes to an image picker controller. Obviously I cannot do that in iPad. So I have hijacked control of that button to bring a popupcontroller that has the image picker in it. This all works well enough, except when I bring up the popup, it is not in the correct place. When

问题 Lets say I wan't to add 1 to an integer. This will only be done when I push down on a UIButton and then release my finger on another UIButton . A drag combo. Whats the easiest way I can make an IBAction occur out of a combo? This could be done with touch coordinates or maybe just UIButtons and IBActions . How do I create a 2-button combo with IBActions 回答1: Try implementing the button you wish to touch down on as a "Touch Down", "Touch Up Inside", and "Touch Up Outside" button. UIButtons can

问题 I am very new to CoreData and in my iPhone app I want to know how to save some text, then load it back in. But the trick is, loading it back in when the date in the UIDatePicker is the same as when I saved it, like a calendar. Hope you can help in anyway. Its pretty important I learn how to do this fairly soon, so any help is massively appreciated, thanks. UPDATE: Thanks for the replies, especially the for the code sample. However I have some issues understand how this fits together, forgive

问题 I am using CoreText to render multiple columns of text. However, when I set the first letter of the 1st paragraph to a bold, larger font than the rest of the text, I incur 2 issues (both visible in the attached image): The spacing underneath the first line is too big (I understand that this is because the 1st character could be a g,y,p,q etc. Lines below the first line now do not line up with corresponding lines in the next column. Any advice on how to overcome these 2 issues would be greatly

问题 I have been following these instructions to help integrate iCloud support with CoreData and I am getting some errors. I have this in my AppDelegate: - (NSPersistentStoreCoordinator *)persistentStoreCoordinator { if (persistentStoreCoordinator != nil) { return persistentStoreCoordinator; } //NSURL *storeURL = [[self applicationDocumentsDirectory] URLByAppendingPathComponent:@"Little_Wedding_Book_Universal.sqlite"]; NSString *storePath = [[NSString stringWithFormat:@"%@", [self

问题 I would like to know how we can use UIPinchGestureRecognizer to scale UIView in single (x or y) directions alone. Say, if the user moves his two fingers in a pinch gesture only in a single direction (horizontal), only the width of the uiview should increase/decrease and if the fingers are moved only vertically, the height should change. If the fingers move diagonally, then both height and width of uiview should increase/decrease. I have seen the MoveMe sample code from Apple.

问题 I would like to know how we can use UIPinchGestureRecognizer to scale UIView in single (x or y) directions alone. Say, if the user moves his two fingers in a pinch gesture only in a single direction (horizontal), only the width of the uiview should increase/decrease and if the fingers are moved only vertically, the height should change. If the fingers move diagonally, then both height and width of uiview should increase/decrease. I have seen the MoveMe sample code from Apple.

问题 What is the iOS 6.0 user agent string? Previous user-agent strings: iOS 5.1 - What is the iOS 5.1 user agent string? iOS 5.0 - What is the iOS 5.0 user agent string? iOS 4.0 - What is the iPhone 4 user-agent? 回答1: iPhone: Mozilla/5.0 (iPhone; CPU iPhone OS 6_0 like Mac OS X) AppleWebKit/536.26 (KHTML, like Gecko) Version/6.0 Mobile/10A5376e Safari/8536.25 iPad: Mozilla/5.0 (iPad; CPU OS 6_0 like Mac OS X) AppleWebKit/536.26 (KHTML, like Gecko) Version/6.0 Mobile/10A5376e Safari/8536.25 For a

问题 What is the iOS 6.0 user agent string? Previous user-agent strings: iOS 5.1 - What is the iOS 5.1 user agent string? iOS 5.0 - What is the iOS 5.0 user agent string? iOS 4.0 - What is the iPhone 4 user-agent? 回答1: iPhone: Mozilla/5.0 (iPhone; CPU iPhone OS 6_0 like Mac OS X) AppleWebKit/536.26 (KHTML, like Gecko) Version/6.0 Mobile/10A5376e Safari/8536.25 iPad: Mozilla/5.0 (iPad; CPU OS 6_0 like Mac OS X) AppleWebKit/536.26 (KHTML, like Gecko) Version/6.0 Mobile/10A5376e Safari/8536.25 For a

问题 What is the iOS 6.0 user agent string? Previous user-agent strings: iOS 5.1 - What is the iOS 5.1 user agent string? iOS 5.0 - What is the iOS 5.0 user agent string? iOS 4.0 - What is the iPhone 4 user-agent? 回答1: iPhone: Mozilla/5.0 (iPhone; CPU iPhone OS 6_0 like Mac OS X) AppleWebKit/536.26 (KHTML, like Gecko) Version/6.0 Mobile/10A5376e Safari/8536.25 iPad: Mozilla/5.0 (iPad; CPU OS 6_0 like Mac OS X) AppleWebKit/536.26 (KHTML, like Gecko) Version/6.0 Mobile/10A5376e Safari/8536.25 For a