uikit

问题 I'm try to get from an UIAlertView the Content with following: UIAlertView *loginView = [[UIAlertView alloc] initWithTitle:@"Login" message:@"Please enter user and pass" delegate:self cancelButtonTitle:@"Abort" otherButtonTitles:@"Login", nil]; [loginView setAlertViewStyle:UIAlertViewStyleLoginAndPasswordInput]; [loginView show]; and then -(void)alertView:(UIAlertView *)alertView didDismissWithButtonIndex:(NSInteger)buttonIndex { if (buttonIndex == 1) { UITextField *username = [alertView

问题 Is it possible to recognize gestures and touches simultaneously when interacting with a UIKit object. For example, when a user is scrolling through a slider or pickerview, could I also be handling a swipe gesture? 回答1: If you set your view controller to be the delegate of your gestures, you can implement: - (BOOL) gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer I'm not sure if you're

问题 I was hoping this would work: protocol Foo : UITableViewDelegate{ } extension Foo{ func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath) { print("ROW:\(indexPath.row)") } } class MyVC : UITableViewController, Foo{ //... } No luck though, the method does not get called. Am I missing something, or is this genuinely not possible? Also, there is no compiler warning/error, the method is just not being called, which some may consider a bug. 回答1: I think this is

问题 I want to use SLComposeServiceViewController inside my app as a UI for composing and posting a message to my backend. However, if I override loadPreviewView and return a view as stated in the documentation, that view doesn't show up. This is my code: @interface ComposeViewController : SLComposeServiceViewController @end @implementation ComposeViewController - (UIView *)loadPreviewView { UIView *v = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 200, 200)]; v.backgroundColor = [UIColor

问题 I have a offlineMapVC and a onlineMapVC for my application to support both online maps (using MapKit and Google Maps) and offline maps (using Route-Me). I made my own mapVC to manage the switching of these mapVCs and be able to use the view controller as one separate view controller. Well I've done this by making the offlineMapVC and the onlineMapVC instance variables of the new mapVC witch I now use all over my application. First off all things seem to work but. However while using this

问题 I'm having an immense amount of trouble figuring out how to populate a Grouped UITableView with custom UITableViewCells. Could anyone point me towards a tutorial on how one might do this? Or does anyone have an example of what a cellForRowAtIndexPath method would look like when creating a Grouped UITableView with custom UITableViewCells? Thanks. 回答1: Here are some guidelines: Each of your group in grouped UITableView is a section. Then the method: - (UITableViewCell *)tableView:(UITableView *

问题 I was using PSButtonCell's for links but three individual ones took up too much space so I'm trying to create a custom cell with three buttons in one row; basically like 3 floating icons. I've got some code for creating a tableview with icons, but currently I do not know how to space them properly (all the icons currently overlap), and I have no idea how I should go about adding tap listeners to the views. Does this look like something I could modify to do what I want? If not does anyone have

问题 Is there a way to capture the amount of screen that is making contact with the users? I assume there is since this finger painting app shows the ipad responding to only the pixels that the user makes contact with. Thanks so much in advance for your help! 回答1: The size of the touch is abstracted away by the framework, and UITouches only contain calculated (“best estimated”) points instead of the raw, actual areas that were touched. I would guess that the “pressure” was calculated from the

问题 I ran into the same problem as desciped in: Crashing while trying to move UITableView rows! All I want to do is on specific reranging operations insert a new cell or delete the selected one. Sometimes I get: ********* Assertion failure in -[_UITableViewUpdateSupport _setupAnimationForReorderingRow], /SourceCache/UIKit/UIKit-963.10/UITableViewSupport.m:295 Attempt to create two animations for cell exception and when I want to reload my data by calling [self.tableView reloadData] I get: *******

问题 I am working with drawing project, and it is quite working well, the only problem is that, it works only with single touch.I want to do multitouch drawing, so that if user draws with his two fingers, then it should draw them Below is my code for single touch drawing -(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event { UITouch *touch = [touches anyObject]; //LocationInView returns the current location of the reciever in coordinate system of the given View. m_previousPoint1 =