I'm adding the following code to my app delegate to get my logo to the UINavigationBar, but it is not working. I have the Logo.png and Logo#2x.png inside the project.
What am I doing wrong?
UIImageView *titleView = [[UIImageView alloc] initWithImage:[UIImage imageNamed:#"Logo.png"]];
[[UINavigationBar appearance] setTitleView:titleView];
Yes, iOS is case-sensitive. Try it again but change:
UIImageView *titleView = [[UIImageView alloc] initWithImage:[UIImage imageNamed:#"Logo.png"]];
to
UIImageView *titleView = [[UIImageView alloc] initWithImage:[UIImage imageNamed:#"logo.png"]];
If I understand your question correctly, then what you'll want to do is to set the tileImage in your ViewController's navigation item like so:
- (void)viewDidLoad
{
[super viewDidLoad];
// Set up the nav bar
UIImage *titleImage = [UIImage imageNamed:#"Logo.png"];
self.navigationItem.titleView = [[UIImageView alloc] initWithImage:titleImage];
}
Related
I have an imageview which I had added a tapRecognizer to like this:
recognizer1 = [[UITapGestureRecognizer alloc] initWithTarget:self action:#selector(handleTap1)];
UIImageView *crossImage = [[UIImageView alloc] initWithFrame:CGRectMake((jrect.origin.x+jrect.size.width), (jrect.origin.y-20), 30, 30)];
crossImage.image = [UIImage imageNamed:#"cross.png"];
[crossImage addGestureRecognizer:recognizer1];
[self addSubview:crossImage];
handleTap method:
- (void)handlePan1:(UITapGestureRecognizer *)recognizer
{
NSLog(#"FV");
}
When I click the image nothing happens. What's wrong?
crossImage.userInteractionEnabled = YES;
You need enable user iteraction. By default is NO for UIImageView.
Is there a way to customize ALL uibarbuttonitems to have a background image without using UIApperance? Unfortunately our codebase has some limitations and we're not able to use UIAppearance so I'm looking for an alternative.
Thanks in advance.
Edit: I was able to do this by subclassing UIBarButtonItem and it works for most of my buttons...but I'm wondering specifically how to do it with default buttons like UITableView edit buttons and UINavigationController backbuttons.
Thanks!
You also can make subclass like this. First i go to make subclass of UIBarButtonItem. My CustomBarButtonItem.h should be like this.
#interface CustomBarButtonItem : UIBarButtonItem
+ (CustomBarButtonItem *)sharedInstance;
- (UIBarButtonItem *)backButtonwithTarget:(id)target andAction:(SEL)action;
#end
then inside my CustomBarButtonItem.m should like this.
#implementation CustomBarButtonItem
static CustomBarButtonItem * _sharedInstance = nil;
+ (CustomBarButtonItem *)sharedInstance
{
if (_sharedInstance != nil)
{
return _sharedInstance;
}
_sharedInstance = [[CustomBarButtonItem alloc] init];
return _sharedInstance;
}
- (UIBarButtonItem *)backButtonwithTarget:(id)target andAction:(SEL)action
{
UIImage *backImage = [UIImage imageNamed:#"back_btn_normal.png"];
UIImage *backPressed = [UIImage imageNamed:#"back_btn_hilight.png"];
UIButton *backButton = [UIButton buttonWithType:UIButtonTypeCustom];
[backButton addTarget:target action:action forControlEvents:UIControlEventTouchUpInside];
[backButton setBackgroundImage:backImage forState:UIControlStateNormal];
[backButton setBackgroundImage:backPressed forState:UIControlStateHighlighted];
const CGFloat BarButtonOffset = 5.0f;
[backButton setFrame:CGRectMake(BarButtonOffset, 0, backImage.size.width, backImage.size.height)];
UIView *containerView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, backImage.size.width, backImage.size.height)];
[containerView addSubview:backButton];
UIBarButtonItem *item = [[UIBarButtonItem alloc] initWithCustomView:containerView];
return item;
}
#end
Then where ever you want to make custom NavigationItem (Button in the NavigationBar) you can put the code below for me it custom.
- (void)viewDidLoad
{
self.navigationItem.leftBarButtonItem = [[CustomBarButtonItem sharedInstance] backButtonwithTarget:self andAction:#selector(searchButtonTapped:)];
}
All of my code are working fine. Hopefully it will help you.
you can do something like this. just copied it out of my project.
_leftBarButton = [[UIBarButtonItem alloc] initWithImage:[UIImage imageNamed:[self imageButton]]
style:UIBarButtonItemStyleBordered
target:self
action:#selector(showLeftViewController)];
[navController.navigationBar.topItem setLeftBarButtonItem:_leftBarButton];
To do this: create category on UINavigationBar and override method drawRect
#implementation UINavigationBar (CustomBackground)
- (void)drawRect:(CGRect)rect {
UIImage *image = [UIImage imageNamed: #"background"];
[image drawInRect:CGRectMake(0, 0, self.frame.size.width, self.frame.size.height)];
}
#end
This code allows you to change background for all UINavigationBar in a project.
I have a bunch of imageview generated in a gridview. But now I want that each imageview can do a segue to another screen. Does anybody knows how I can do that? Here is the code of how I generated my imageview and put it into my grid.
UIImageView * myView = [[UIImageView alloc] initWithImage:myImage];
CGRect rect = myView.frame;
rect.origin.x = xCurrent;
rect.origin.y = yCurrent;
myView.frame = rect;
myView.tag = cellCounter;
[gridContainerView addSubview:myView];
UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc] initWithTarget:self action:#selector(handleTap:)];
myView.userInteractionEnabled = YES;
[myView addGestureRecognizer:tap];
Please help
Kind regards
You are looking for a tapGestureRecognizer. Add one of those to your image views and make the action call your segue method.
UIImageView *img = [[UIImageView alloc] init];
UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc] initWithTarget:self action:#selector(mySequeMethod:)];
img.userInteractionEnabled = YES;
[img addGestureRecognizer:tap];
A:
use a custom button instead of UIImageView, and set the image... and then segue with that button, (it looks the same)
B:
use a gesture recognizer to the view, and use a tap with one finger.
In this code example, i am trying to produce the following view hierarchy
Window -> background image -> scroll view -> text view
All i see however is
Window -> background image
What am i missing please?
-(void) viewWillAppear:(BOOL)animated {
UIScrollView *scrollWindow = [[UIScrollView alloc]
initWithFrame:CGRectMake(30, 30, 440, 212)];
UITextView *scrollableText = [[UITextView alloc] init];
[scrollableText setEditable:NO];
[scrollableText setText:#"Why, hello there"];
[scrollWindow addSubview:scrollableText];
UIImage *backgroundImage = [[UIImage alloc] initWithCGImage:
[UIImage imageNamed:#"about_bg.png"].CGImage];
UIImageView *backgroundView = [[UIImageView alloc]
initWithImage:backgroundImage];
[backgroundView addSubview:scrollWindow];
[[self view] addSubview:backgroundView];
}
Andrew is right about not making the scroll view a subview of the background UIImageView view. But the scroll view is invisible. Only its content (scrollableText) will show. And you haven't set scrollableText's frame, so it's effectively invisible too. Init like so:
[scrollableText setEditable:NO];
[scrollableText setText:#"Why, hello there"];
[scrollableText setFrame:CGRectMake(0, 0, 100, 100)];
And you should see it.
What you need is this hierarchy:
Window
background image view
scroll view
text view
Try adding two subviews to your window, not shove them all as subviews into each other.''-
- (void) viewWillAppear:(BOOL)animated {
UIScrollView *scrollWindow = [[UIScrollView alloc] initWithFrame:CGRectMake(30, 30, 440, 212)];
UITextView *scrollableText = [[UITextView alloc] init];
UIImageView *backgroundView = [[UIImageView alloc] initWithImage:[UIImage imageNamed:#"about_bg.png"]];
scrollableText.editable = NO;
scrollableText.text = #"Why, hello there";
[scrollWindow addSubview:scrollableText];
[self.view addSubview:backgroundView];
[self.view addSubview:scrollWindow];
}
It's pretty embarrassing asking this because I've been building apps for a while now. In the past I've always used Interface Builder to set up my views etc.
Here is my loadView:
- (void)loadView {
UIView *splashView = [[UIView alloc] initWithFrame:[[UIScreen mainScreen] applicationFrame]];
splashView.backgroundColor = [UIColor clearColor];
UIImageView *splashImage = [[UIImageView alloc] initWithImage:[UIImage imageNamed:[[NSBundle mainBundle]pathForResource:#"splash" ofType:#"jpg"]]];
splashImage.frame = [splashView bounds];
[splashView addSubview:splashImage];
self.view = splashView;
}
For some reason the imageView isn't appearing. No errors, but just no appearance. The UIView is added, but the UIImageView isn't.
Like I said, I've traditionally done this with IB so I'm not so familiar with the programatic method.
Any help appreciated.
Add splashView to self.view:
self.view = splashView;
or add your splashImage into self.view. In this case you don't need the UIView - splashView:
UIImageView *splashImage = [[UIImageView alloc] initWithImage:[UIImage imageNamed:[[NSBundle mainBundle]pathForResource:#"splash" ofType:#"jpg"]]];
splashImage.frame = [splashView bounds];
[self.view addSubview:splashImage];
Try not creating a new view called splash view and just add the image view to your self.view.