I'm having a problem with this basic code:
-(id)init{
self = [super init];
if(self){
self.mensaje = [[UILabel alloc]initWithFrame:CGRectMake(100.0, 100.0, 100.0, 100.0)];
[self.mensaje setText:#"He vuelto"];
[self.view addSubview:self.mensaje];
[self.mensaje setHidden:YES];
}
return self;
}
All the code works fine, except [self.mensaje setHidden:YES];. The Label is always shown at start.
I hope could help me, this is basic, but necessary!!
Good luck!
This code is in the wrong place. You shouldn't be creating and working with views in the initializer of a view controller (assuming the above code is inside a view controller class).
instead, do the following:
- (id)init
{
self = [super init];
if (self) {
// init any state other than views
}
return self;
}
- (void)viewDidLoad
{
[super viewDidLoad];
self.mensaje = [[UILabel alloc] initWithFrame:CGRectMake(100.0, 100.0, 100.0, 100.0)];
[self.mensaje setText:#"He vuelto"];
[self.view addSubview:self.mensaje];
[self.mensaje setHidden:YES];
}
This also assumes you are using ARC. If not, you need to add autorelease as follows:
self.mensaje = [[[UILabel alloc] initWithFrame:CGRectMake(100.0, 100.0, 100.0, 100.0)] autorelease];
Related
I have a subclass of UIView called InvitedView. It is instantiated in viewDidLoad like this:
ViewController.m
invitedView = [[InvitedView alloc] initWithFrame:CGRectMake(100, 244, 120, 80)];
invitedView.backgroundColor = [UIColor colorWithRed:156.0f/255.0f green:214.0f/255.0f blue:215.0f/255.0f alpha:0.9f];
[self.view addSubview:invitedView];
[invitedView setHidden:YES];
The class itself looks like this:
InvitedView.m
#import "InvitedView.h"
#import "AppDelegate.h"
#import "ViewController.h"
#class ViewController;
#interface InvitedView() {
UIButton *accept;
UIButton *decline;
UILabel *question;
UIView *gray;
ViewController *myViewController;
}
#end
#implementation InvitedView
- (id)initWithFrame:(CGRect)frame
{
self = [super initWithFrame:frame];
if (self) {
gray = [[UIView alloc] initWithFrame:frame];
NSString *holduser = [(AppDelegate*)[[UIApplication sharedApplication] delegate] invitedby];
[self addSubview:gray];
accept = [[UIButton alloc] init];
decline = [[UIButton alloc] init];
question = [[UILabel alloc] init];
question.text = [[NSString alloc] initWithFormat:#"You have been invited to a group game by %#", holduser];
question.numberOfLines = 0;
question.textAlignment = NSTextAlignmentCenter;
question.textColor = [UIColor colorWithRed:211.0f/255.0f green:243.0f/255.0f blue:219.0f/255.0f alpha:1.0f];
accept.backgroundColor = [UIColor clearColor];
accept.frame = CGRectMake(20, gray.frame.size.height / 2, (gray.frame.size.width / 2) - 10, (gray.frame.size.height / 2) - 20);
decline.backgroundColor = [UIColor clearColor];
decline.frame = CGRectMake((gray.frame.size.width / 2) + 10, (gray.frame.size.width / 2) - 20, (gray.frame.size.width / 2) - 20, (gray.frame.size.height / 2) - 20);
question.frame = CGRectMake(20, 20, gray.frame.size.width, (gray.frame.size.height / 2) - 20);
[question setFont:[UIFont fontWithName:#"HelveticaNeue-Bold" size:18.0]];
[accept addTarget:myViewController action:#selector(acceptInvite) forControlEvents:UIControlEventTouchUpInside];
[decline addTarget:myViewController action:#selector(declineInvite) forControlEvents:UIControlEventTouchUpInside];
[gray addSubview:accept];
[gray addSubview:decline];
[gray addSubview:question];
}
return self;
}
#end
The method where the view is supposed to be shown is in the view controller showing the view. It ends up getting called, I can verify that the log messages happen all the way up until the setHidden function:
ViewController.m
- (void)doSomethingWithTheNewValueOfFlagForHid {
NSLog(#"issettingtheview******");
dispatch_async(dispatch_get_main_queue(), ^(void){
NSLog(#"issettingtheviewmu2******");
[invitedView setHidden:NO];
});
}
I would like to know why invitedView isn't being shown after [invitedView setHidden:NO].
It gets all the way to setHidden, and then nothing happens. I would appreciate any help, thanks in advance.
In ViewDidLoad, change line to
[invitedView setHidden:NO];
to make sure you can actually see the view (frame is ok, no view above ...)
You might also want to check Xcodes 3D View Debugging
The only reason that it wasn't showing up, is that invitedView was being instantiated inside an if statement that wasn't being executed. However - shallowThought's idea to switch setHidden to YES started me down a more productive debugging tract, leading to the discovery.
I have seen how to create your own custom init method I have one that looks like this
- (id)initWithArray:(NSArray *)array
{
if ((self = [super init])) {
currentArray = array;
NSLog(#"%#", currentArray);
}
return self;
}
however when I try to call it i can never see initWithArray this is the way I call it.
if (![pictureViewController.view superview]) {
pictureViewController= [[PictureViewController alloc] init];
pictureViewController.stackRotationController = stackRotationController;
[pictureViewController ini = pluginsMutableArray]; // cannot see initWithArray
[pictureViewController.view setBackgroundColor:[UIColor whiteColor]];
pictureViewController.view.frame = CGRectMake(0.0, ScreenHeight, ScreenWidth, ScreenHeight);
pictureViewController.prefToolBar.frame = CGRectMake(0.0, 0.0, ScreenWidth, 45.0);
[pictureViewController.view addSubview:pictureViewController.prefToolBar];
[[UIToolbar appeara}nce] setBarTintColor:[UIColor colorWithRed:colorController.oRed/255.0 green:colorController.oGreen/255.0 blue:colorController.oBlue/255.0 alpha:1.0]];
I'd like to pop an view with textInput box and button. I can't understand why UITableView works but UIView doesn't.
- (void)viewDidLoad
{
[super viewDidLoad];
self.containerView = [[UITableView alloc] initWithFrame:CGRectMake(20, 100,200,200)];
[[self view]addSubview:self.containerView];
}
Use above code I can saw the view. But if I change to:
- (void)viewDidLoad
{
[super viewDidLoad];
self.containerView = [[UIView alloc] initWithFrame:CGRectMake(20, 100,200,200)];
[[self view]addSubview:self.containerView];
}
I will get nothing, a black screen. Nothing displayed.
Could someone tell me the reason? Thank you very much.
self.containerView = [[UIView alloc] initWithFrame:CGRectMake(20, 100,200,200)];
self.containerView.backgroundColor = [UIColor redColor];
try this code
.
I've used UITapGestureRecognizer tons of times, but in this case I'm getting EXC_BAD_ACCESS when a tap occurs. I think it has to do with the fact that I'm adding it to an Alert-type overlay view. And for some reason the overlay view isn't getting retained even though it's on-screen.
I'm creating the view like this:
HelperView *testHelper = [HelperView helperWithBodyText:#"test text"];
[testHelper presentAtPoint:screenCenter];
The convenience method in HelperView.m looks like this:
+ (id)helperWithBodyText:(NSString*)text
{
return [[self alloc] initWithFrame:CGRectZero bodyText:text];
}
And the rest of the code looks like this:
- (id)initWithFrame:(CGRect)frame
{
self = [super initWithFrame:frame];
if (self) {
self.container = [[AGWindowView alloc] initAndAddToKeyWindow];
self.container.supportedInterfaceOrientations = UIInterfaceOrientationMaskLandscapeRight;
self.overlay = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 100, 100)];
self.overlay.backgroundColor = [UIColor redColor];
self.overlay.alpha = 0.6;
[self.container addSubviewAndFillBounds:self.overlay]; //this fills the screen with a transparent red color, for testing
UITapGestureRecognizer * tap = [[UITapGestureRecognizer alloc] initWithTarget:self action:#selector(dismissMe:)];
[self.overlay addGestureRecognizer:tap]; //I want to dismiss the whole view if the overlay is tapped
self.content = [[UIView alloc] initWithFrame:CGRectZero];
}
return self;
}
- (id)initWithFrame:(CGRect)frame bodyText:(NSString*)bodyText
{
self = [self initWithFrame:frame];
if (self) {
//TEST frame
self.content.frame = CGRectMake(0, 0, 217, 134);
// Initialization code
UIImage *bgImage = [[UIImage imageNamed:#"helper-bg"]
resizableImageWithCapInsets:UIEdgeInsetsMake(30, 28, 20, 20)];
UIImageView *bgImgView = [[UIImageView alloc] initWithImage:bgImage];
bgImgView.bounds = self.content.frame;
[self.content addSubview:bgImgView];
}
return self;
}
- (void)presentAtPoint:(CGPoint)loc
{
CGPoint newPoint = [self.container convertPoint:loc toView:self.container];
self.content.center = newPoint;
[self.container addSubview:self.content];
}
- (void)dismissMe:(UITapGestureRecognizer*)recognizer
{
//this never happens - I get EXC_BAD_ACCESS when I tap the overlay
}
HelperView is not the view getting displayed and it's not getting retained, but you're using as the target for the gesture recognizer. The AGWindowView property "container" is getting displayed and retained by its superview. Your code needs refactoring since you have this view HelperView that doesn't ever display anything itself, but if you want it to work like this you need to retain HelperView so it doesn't automatically get released. You can do this by assigning it to a strong instance variable.
I'm using a CvVideo Camera thus:
- (void)viewDidLoad
{
[super viewDidLoad];
self.videoCamera = [[CvVideoCamera alloc] initWithParentView:imageView];
self.videoCamera.delegate = self;
self.videoCamera.defaultAVCaptureDevicePosition = AVCaptureDevicePositionBack;
self.videoCamera.defaultAVCaptureSessionPreset = AVCaptureSessionPresetiFrame960x540;
self.videoCamera.defaultAVCaptureVideoOrientation = AVCaptureVideoOrientationPortrait;
self.videoCamera.defaultFPS = 30;
}
- (void)viewDidAppear:(BOOL)animated
{
[super viewDidAppear:animated];
[self.videoCamera start];
}
My storyboard looks like this:
When the view loads, the bar is visible briefly with the rest of the view white. Then when the camera starts it fills the whole screen. Why is it doing this?
Have you tried with a different parent view?
UIView *camView = [[UIView alloc] initWithFrame:CGRectMake(10, 10, 300, 400)];
[self.view addSubview:camView];
self.videoCamera = [[CvVideoCamera alloc] initWithParentView:camView];