uibarbuttonitem

问题 UIBarButtonItem *button = [[UIBarButtonItem alloc] initWithCustomView:[[UIImageView alloc] initWithImage:[UIImage imageNamed:@"cancel.png"]]]; button.target = picker.navigationBar.topItem.leftBarButtonItem ; button.action = picker.navigationBar.topItem.leftBarButtonItem.action; picker.navigationBar.topItem.leftBarButtonItem=button; Hi folks, I'm trying to change the style of the buttons of the mail composer. The above code does change the look of the button, however the action seems to be

问题 I have UIBarButton and user can change image just chose photo or gallery image with image picker. My problem is bad scale image. If I use AspectFit my UIBarButton look like this: If I use AspectFill my UIBarButton look like this: and if I try first change size image and after set it, image all time scratched: This is my code: func createPhotoBarButton(image: Data) { let barbtn = UIBarButtonItem() var image = UIImage(data:image) if image == nil { image = UIImage(named: "photoIcon") } let

问题 Hoping someone here has conquered this one 'cuz it's driving me crazy. My app includes a popover that is used to enter and edit information. I learned today that it's possible to show a toolbar at the bottom of the popover and that's great -- except that I cannot for the life of me get any buttons to show on said toolbar. Here's where we start: UINavigationController *navigationController = [[UINavigationController alloc] initWithRootViewController: editorViewer]; //*** This makes the toolbar

问题 I have a UIBarButtonItem . When it receives a message it cannot handle, I want it to forward that message to a particular view controller. I thought I might be able to accomplish this using the bar button item's forwardingTargetForSelector: method, but apparently no such property is found on objects of type UIBarButtonItem . (Point of terminology: Does that mean forwardingTargetForSelector: is a private property? edit: Wait, I think I'm confused... methods with a colon at the end aren't

问题 This is my code - (void)createCustomBtnRightBar:(UIImage *)buttonImage { self.navigationItem.rightBarButtonItem = nil; UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom]; if (buttonImage != nil) { [button setImage:buttonImage forState:UIControlStateNormal]; button.frame = CGRectMake(0, 0, 45, 33); button.imageEdgeInsets = UIEdgeInsetsMake(0, 0, 0, -10); } else { [button setTitle:@"Add New Pal" forState:UIControlStateNormal]; button.frame = CGRectMake(0, 0, 110, 24); [button

问题 i have this piece of code which permits me to insert a title on the UIbar (if i'm not wrong) of the app. [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(ApplicationDidBecomeActive:) name:UIApplicationDidBecomeActiveNotification object:nil]; [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(goToAlbum) name:@"GetAlbumNotif" object:nil]; self.title = @"Events List"; Can you please give me an orientation to this? Thanks! 回答1: UIImageView

问题 Hi there my current code is as follows and i would like to know how to implement a button icon change within my current if statement if possible if this is not possible then what code will i need to use instead? Many thanks in advance. viewController.m #import "GroupsViewController.h" #import "CustomCell.h" @interface GroupsViewController () { NSArray *arrayOfImages; NSArray *arrayOfDescriptions; } @end @implementation GroupsViewController { NSString *reuseIdentifier; } - (void)viewDidLoad {

问题 When I press the nextButton, which is UIBarButton. Then associated action is not performed. UIButton *nextButton1=[UIButton buttonWithType:UIButtonTypeCustom]; [nextButton1 setBackgroundImage:[UIImage imageNamed:@"next.png"] forState:UIControlStateNormal]; [nextButton1 addTarget:self action:@selector(goToItems) forControlEvents:UIControlEventTouchUpOutside]; [nextButton1 sizeToFit]; UIBarButtonItem *nextButton=[[UIBarButtonItem alloc]initWithCustomView:nextButton1]; self.navigationItem

问题 If I use the UIBarButtonSystemItemCancel, it's color is set to that of the navigation bar. However, in the Photos App, the "Cancel" button is shown with a blue background. How can I also set the UIBarButtonSystemItemCancel to have a blue background please? 回答1: your can use image as button image as UIImage *buttonImage = [UIImage imageNamed:@"image.png"]; //create the button and assign the image UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom]; [button setImage:buttonImage

问题 I want to make a simple view with a navigation bar and a table view. So I created a subclass of UINavigationController and I added a UITableView in it. My is is also the UITableViewDataSource and UITableViewDelegate . Now I want to add UIBarButton in the navigation bar but it doesn't work : UIBarButtonItem *anotherButton = [[UIBarButtonItem alloc] initWithTitle:[[Translator instance] getTranslation:@"Back"] style:UIBarButtonItemStylePlain target:self.parentViewController action:@selector