Question

我有一个视图控制器，可以创建一个图像框（白框），用户可以在其中签名。在ipad上的纵向模式下，这很好用但是当我从横向模式进行签名时，框出现在屏幕的左下方，而不是像它应该的那样位于中心。

我已经使用了以下代码，我们将不胜感激任何帮助或建议。

@interface PropertyOwnerSignatureViewController ()

@end

@implementation PropertyOwnerSignatureViewController

@synthesize mySignatureImage;
@synthesize lastContactPoint1, lastContactPoint2, currentPoint;
@synthesize imageFrame;
@synthesize fingerMoved;
@synthesize navbarHeight;


- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
    self                             = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
    if (self) {
        // Custom initialization
    }
    return self;
}

- (void)viewDidLoad
{
    [super viewDidLoad];
    [[UIDevice currentDevice] beginGeneratingDeviceOrientationNotifications];
    [[NSNotificationCenter defaultCenter]
     addObserver:self selector:@selector(orientationChanged:)
     name:UIDeviceOrientationDidChangeNotification
     object:[UIDevice currentDevice]];


    //    //set the title of the navigation view
    [self.navigationItem setTitle:@"Sign here"];

        self.view.backgroundColor        = [UIColor lightGrayColor];

     //get reference to the navigation frame to calculate navigation bar height
    CGRect navigationframe           = [[self.navigationController navigationBar] frame];
    navbarHeight                     = navigationframe.size.height;
    //

    //    //create a frame for our signature capture based on whats remaining
    imageFrame                       = CGRectMake(self.view.center.x,
                                                  self.view.center.y,
                                                  self.view.frame.size.width,
                                                  self.view.frame.size.height/2.5);



    //    //allocate an image view and add to the main view
    mySignatureImage                 = [[UIImageView alloc] initWithImage:nil];
    mySignatureImage.frame           = imageFrame;
    mySignatureImage.center          = self.view.center;
    mySignatureImage.backgroundColor = [UIColor whiteColor];
    [self.view addSubview:mySignatureImage];
    AppDelegate *appDelegate =
    [[UIApplication sharedApplication] delegate];
    if(appDelegate.imagePhSignature)
    {
        mySignatureImage.image = appDelegate.imagePhSignature;
    }


}

- (void) orientationChanged:(NSNotification *)note
{
    UIDevice * device = note.object;
    mySignatureImage.center          = self.view.center;

    switch(device.orientation)
    {
        case UIDeviceOrientationPortrait:
            /* start special animation */
            break;

        case UIDeviceOrientationPortraitUpsideDown:
            /* start special animation */
            break;

        default:
            break;
    };
}

Answer 1

替换此行

AppDelegate *appDelegate =
[[UIApplication sharedApplication] delegate];

//    //create a frame for our signature capture based on whats remaining
imageFrame                       = CGRectMake(appDelegate.window.center.x,
                                              appDelegate.window.center.y,
                                              appDelegate.window.size.width,
                                              appDelegate.window.bounds.size.width/1.5);

签名框在横向模式下无法正确显示

1 个答案: