I'm trying to give a label in one of the classes in my app a drop shadow, but it's not working at all. Nothing shows up. What am I doing wrong?
// Set label properties
titleLabel.font = [UIFont boldSystemFontOfSize:TITLE_FONT_SIZE];
titleLabel.adjustsFontSizeToFitWidth = NO;
titleLabel.opaque = YES;
titleLabel.backgroundColor = [UIColor clearColor];
titleLabel.textColor = titleLabelColor;
titleLabel.shadowColor = [UIColor blackColor];
titleLabel.shadowOffset = CGSizeMake(10, 10);
It's just white, no shadow.
Just Add this line to before adding titleLabel to self.view
titleLabel.layer.masksToBounds = NO;
Good Luck !!
i hope you are aware of categories?
Creating a category will be better option:
Command + N > Objective-C Category > Category = Animation & Category on = UIView
This will create 2 files with name UIView+Animation.h and UIView+Animation.m
UIView+Animation.h file
#import <UIKit/UIKit.h>
#import <QuartzCore/QuartzCore.h>
#interface UIView (Animation)
- (void)setBackgroundShadow:(UIColor *)shadowColor CGSize:(CGSize)CGSize shadowOpacity:(float)shadowOpacity shadowRadius:(float)shadowRadius;
#end
UIView+Animation.m file
#import "UIView+Animation.h"
#implementation UIView (Animation)
- (void)setBackgroundShadow:(UIColor *)shadowColor CGSize:(CGSize)CGSize shadowOpacity:(float)shadowOpacity shadowRadius:(float)shadowRadius
{
self.layer.shadowColor = shadowColor.CGColor;
self.layer.shadowOffset = CGSize;
self.layer.shadowOpacity = shadowOpacity;
self.layer.shadowRadius = shadowRadius;
self.clipsToBounds = NO;
}
Import UIView+Animation.h in any of your viewController and call it like this:
[self.titleLabel setBackgroundShadow:[UIColor grayColor] CGSize:CGSizeMake(0, 5) shadowOpacity:1 shadowRadius:5.0];
Just make sure that you allocate the UILabel and also set a frame for the label. And also make sure that view is added to the subview. Something like this:
titleLabel = [[UILabel alloc] initWithFrame:CGRectMake(100, 100, 100, 30)];
titleLabel.font = [UIFont boldSystemFontOfSize:14];
titleLabel.adjustsFontSizeToFitWidth = NO;
titleLabel.opaque = YES;
titleLabel.text = #"My Label";
titleLabel.backgroundColor = [UIColor clearColor];
titleLabel.textColor = [UIColor whiteColor];
titleLabel.shadowColor = [UIColor blackColor];
titleLabel.shadowOffset = CGSizeMake(5, 5);
[myView addSubview:titleLabel];
[titleLabel release];
value 10 for shadow offset is quite big. You can tweak the values based on your requirements.
Related
I've to create a view in objective c with two labels on it, label1 has single line and label2 is multi line based on content.
Based on content in the labels I want to adjust view height how can I do that?
Width of the view should be 20 left and right to screen width with below code I can show in portrait but in landscape it was not coming properly, It crops on the right side. How can I do show that right 20 for landscape?
Portrait
Landscape
UIView *emptyTreeView = [[UIView alloc] initWithFrame:CGRectMake(20,20,self.view.frame.size.width - 40,400)];
UILabel *label1 = [[UILabel alloc] initWithFrame:CGRectMake(30.0, 30.0, self.view.frame.size.width - 100, 30.0)];
UILabel *label2 = [[UILabel alloc] initWithFrame:CGRectMake(30.0, 90.0, self.view.frame.size.width - 100, 100.0)];
emptyTreeView.backgroundColor=[UIColor blueColor];
label1.backgroundColor = [UIColor redColor];
label1.textAlignment = NSTextAlignmentCenter;
label1.textColor = [UIColor blackColor];
label1.font = [UIFont boldSystemFontOfSize:18];
label1.numberOfLines = 0;
label1.text = #"The Page Cannot be displayed.";
label2.backgroundColor = [UIColor whiteColor];
label2.textAlignment = NSTextAlignmentCenter;
label2.textColor = [UIColor grayColor];
label2.font = [UIFont systemFontOfSize:15];
label2.numberOfLines = 0;
label2.text = #"Please use this feature or contact your internal contact person directly.";
[emptyTreeView addSubview:label1];
[emptyTreeView addSubview:label2];
[self.view addSubview:emptyTreeView];
Am I doing anything wrong?
A few observations:
Do not add subviews in viewDidLayoutSubviews. That is only for adjusting frame values.
If you refer to self.view, reference its bounds, not its frame. The former is for coordinates of subviews within self.view. The latter is in the coordinate system of its superview (which might not introduce any differences right now, but is just the wrong coordinate system.
If you want the view to resize on rotation, set its autoresizingMask, e.g.
emptyTreeView.autoresizingMask = UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight | UIViewAutoresizingFlexibleBottomMargin;
Or
emptyTreeView.autoresizingMask = UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleBottomMargin;
Nowadays, setting frame values and autoresizing masks is a bit of an anachronism. We would generally use constraints, e.g.
- (void)viewDidLoad {
[super viewDidLoad];
UIView *emptyTreeView = [[UIView alloc] init];
UILabel *label1 = [[UILabel alloc] init];
UILabel *label2 = [[UILabel alloc] init];
emptyTreeView.backgroundColor = [UIColor blueColor];
label1.backgroundColor = [UIColor redColor];
label1.textAlignment = NSTextAlignmentCenter;
label1.textColor = [UIColor blackColor];
label1.font = [UIFont boldSystemFontOfSize:18];
label1.numberOfLines = 0;
label1.text = #"The Page Cannot be displayed.";
label2.backgroundColor = [UIColor whiteColor];
label2.textAlignment = NSTextAlignmentCenter;
label2.textColor = [UIColor grayColor];
label2.font = [UIFont systemFontOfSize:15];
label2.numberOfLines = 0;
label2.text = #"Please use this feature or contact your internal contact person directly.";
[emptyTreeView addSubview:label1];
[emptyTreeView addSubview:label2];
[self.view addSubview:emptyTreeView];
emptyTreeView.translatesAutoresizingMaskIntoConstraints = false;
label1.translatesAutoresizingMaskIntoConstraints = false;
label2.translatesAutoresizingMaskIntoConstraints = false;
[NSLayoutConstraint activateConstraints:#[
[emptyTreeView.leftAnchor constraintEqualToAnchor:self.view.safeAreaLayoutGuide.leftAnchor constant:20],
[emptyTreeView.rightAnchor constraintEqualToAnchor:self.view.safeAreaLayoutGuide.rightAnchor constant:-10],
[emptyTreeView.topAnchor constraintEqualToAnchor:self.view.safeAreaLayoutGuide.topAnchor constant:20],
[label1.leftAnchor constraintEqualToAnchor:emptyTreeView.leftAnchor constant:20],
[label1.rightAnchor constraintEqualToAnchor:emptyTreeView.rightAnchor constant:-20],
[label1.topAnchor constraintEqualToAnchor:emptyTreeView.topAnchor constant:20],
[label2.leftAnchor constraintEqualToAnchor:emptyTreeView.leftAnchor constant:20],
[label2.rightAnchor constraintEqualToAnchor:emptyTreeView.rightAnchor constant:-20],
[label2.topAnchor constraintEqualToAnchor:label1.bottomAnchor constant:20],
[emptyTreeView.bottomAnchor constraintEqualToAnchor:label2.bottomAnchor constant:20]
]];
}
Note the translatesAutoresizingMaskIntoConstraints is false and the constraints.
I use a UITableView and I want to setup a text at the beginning.
My code is:
UIView *tableHeaderView = [[UILabel alloc]initWithFrame:CGRectMake(0.0, 0.0, self.tableView.frame.size.width, 20.0)];
tableHeaderView.backgroundColor = [UIColor groupTableViewBackgroundColor];
UILabel *tableHeaderLabel = [[UILabel alloc]initWithFrame:CGRectMake(15.0,0,tableHeaderView.frame.size.width-15.0,tableHeaderView.frame.size.height)];
tableHeaderLabel.text = #"Countries";
if([UIFont respondsToSelector:#selector(preferredFontForTextStyle:)])
tableHeaderLabel.font = [UIFont preferredFontForTextStyle:UIFontTextStyleHeadline];
else
tableHeaderLabel.font = [UIFont boldSystemFontOfSize:14.0];
[tableHeaderView addSubview:tableHeaderLabel];
self.tableView.tableHeaderView = tableHeaderView;
[tableHeaderView bringSubviewToFront:tableHeaderLabel];
[tableHeaderLabel release];
[tableHeaderView release];
The problem is that the text isn't shown.
If I suppress the backgroundColor of the main header view, or if I replace it with a transparent one as if the Label awas under the main header view.
So I added the line:
[tableHeaderView bringSubviewToFront:tableHeaderLabel];
but this doesn't fix the issue.
I can't use the Label directly as the tableViewHeaderView directly becaus I want to left space at the left of the text.
Anybody have an idea to help me?
Thanks.
The only problem you have here is a typo in the first line, initialized an UIView wrongly as an UILabel. The compiler will not compliant as UILabel is a subclass of UIView.
I ran the following code and it worked as expected: (The code is for ARC, if you are not using it, don't forget to do the release!)
- (void)viewDidLoad {
[super viewDidLoad];
UIView *tableHeaderView = [[UIView alloc] initWithFrame:CGRectMake(0.0, 0.0,
self.tableView.frame.size.width,
20.0)];
tableHeaderView.backgroundColor = [UIColor groupTableViewBackgroundColor];
UILabel *tableHeaderLabel = [[UILabel alloc] initWithFrame:CGRectMake(15.0, 0,
tableHeaderView.frame.size.width - 15.0,
tableHeaderView.frame.size.height)];
tableHeaderLabel.text = #"Countries";
tableHeaderView.backgroundColor = [UIColor groupTableViewBackgroundColor];
if([UIFont respondsToSelector:#selector(preferredFontForTextStyle:)]) {
tableHeaderLabel.font = [UIFont preferredFontForTextStyle:UIFontTextStyleHeadline];
} else {
tableHeaderLabel.font = [UIFont boldSystemFontOfSize:14.0];
}
[tableHeaderView addSubview:tableHeaderLabel];
self.tableView.tableHeaderView = tableHeaderView;
}
I will drawing UILabel with code
CustomLabel *label = [[CustomLabel alloc] initWithFrame:CGRectMake(0, 0, 260, 100)];
label.layer.borderColor = [[UIColor redColor] CGColor];
label.layer.borderWidth = 3.0;
[label setFont:[UIFont fontWithName:#"Helvetica" size:16]];
CALayer * l1 = [label layer];
[l1 setMasksToBounds:YES];
[l1 setCornerRadius:10.0];
label.backgroundColor = [UIColor clearColor];
label.textAlignment = NSTextAlignmentLeft; // UITextAlignmentCenter, UITextAlignmentLeft
label.textColor=[UIColor whiteColor];
label.backgroundColor = [UIColor redColor];
label.numberOfLines=4;
label.lineBreakMode=NSLineBreakByWordWrapping;
label.text = [NSString stringWithFormat:#"%#", message];
label.tag = index;
[label sizeToFit];
And of course, i will found a solution from stackoverflow for create padding for label
with code
- (id)initWithFrame:(CGRect)frame{
self = [super initWithFrame:frame];
if (self) {
self.edgeInsets = UIEdgeInsetsMake(5,5,5,5); //customize padding here
}
return self;
}
- (void)drawTextInRect:(CGRect)rect {
[super drawTextInRect:UIEdgeInsetsInsetRect(rect, self.edgeInsets)];
}
Everything working fine, but text in my label showing not good, here is my label screenshot.
I want like this.
Please help and thanks for your time.
you would want to have a look into this library.. its awesome and totally configurable...
https://github.com/AlexBarinov/UIBubbleTableView
How come the UILabel drawn in this code is not in the center of the view?
//create the view and make it gray
UIView *view = [[UIView alloc] init];
view.backgroundColor = [UIColor darkGrayColor];
//everything for label
UILabel *label = [[UILabel alloc] initWithFrame:CGRectMake(0,0,42,21)];
//set text of label
NSString *welcomeMessage = [#"Welcome, " stringByAppendingString:#"username"];
welcomeMessage = [welcomeMessage stringByAppendingString:#"!"];
label.text = welcomeMessage;
//set color
label.backgroundColor = [UIColor darkGrayColor];
label.textColor = [UIColor whiteColor];
//properties
label.textAlignment = NSTextAlignmentCenter;
[label sizeToFit];
//add the components to the view
[view addSubview: label];
label.center = view.center;
//show the view
self.view = view;
The line, label.center = view.center; should move the label to the center of the view. But instead moves it to where the center of the label is in the left hand corner of the view as shown below.
(source: gyazo.com)
Does anyone know why?
You need to init your view with a frame:
UIView *view = [[UIView alloc] initWithFrame:self.view.frame];
This is caused by your view variable not having a frame defined. By default it has a frame set to (0, 0, 0, 0), so its center is (0, 0).
Hence when you do label.center = view.center;, you set the center of your label to (0 - label.width / 2, 0 - label.height /2). (-80.5 -10.5; 161 21) in your case.
There is no need for a new UIView if your UIViewController already have one, just work with self.view.
- (void)viewDidLoad
{
[super viewDidLoad];
//create the view and make it gray
self.view.backgroundColor = [UIColor darkGrayColor];
//everything for label
UILabel *label = [[UILabel alloc] init];
//set text of label
// stringWithFormat is useful in this case ;)
NSString *welcomeMessage = [NSString stringWithFormat:#"Welcome, %#!", #"username"];
label.text = welcomeMessage;
//set color
label.backgroundColor = [UIColor darkGrayColor];
label.textColor = [UIColor whiteColor];
//properties
label.textAlignment = NSTextAlignmentCenter;
[label sizeToFit];
//add the components to the view
[self.view addSubview: label];
label.center = self.view.center;
}
Also note that doing label.center = self.view.center will not work properly when rotating to landscape mode.
Your code would work fine if you put it in the viewDiLayoutSubviews instead of viewDidLoad
I am trying to add a custom view in the center of a navigation bar and I am using the following code to test it:
UIView * testView = [[UIView alloc] init];
[testView setBackgroundColor:[UIColor blackColor]];
testView.frame = CGRectMake(0, 0, 100, 35);
[self.navigationController.navigationItem.titleView addSubview:testView];
I am setting this up in the viewDidLoad method of my view controller but when i run my program
nothing seems to change in my navigation bar.
Could you help me with this?
This works. Give frame at the time of initialisation
UIView *iv = [[UIView alloc] initWithFrame:CGRectMake(0,0,32,32)];
[iv setBackgroundColor:[UIColor whiteColor]];
self.navigationItem.titleView = iv;
If you want to just customize the title for one view controller you can use
UILabel *lblTitle = [[UILabel alloc] init];
lblTitle.text = #"Diga-nos o motivo";
lblTitle.backgroundColor = [UIColor clearColor];
lblTitle.textColor = [UIColor colorWithRed:77.0/255.0 green:77.0/255.0 blue:77.0/255.0 alpha:1.0];
lblTitle.shadowColor = [UIColor whiteColor];
lblTitle.shadowOffset = CGSizeMake(0, 1);
lblTitle.font = [UIFont fontWithName:#"HelveticaNeue-Bold" size:18.0];
[lblTitle sizeToFit];
self.navigationItem.titleView = lblTitle;
or if you want to customize for all view controllers use
[[UINavigationBar appearance] setTitleTextAttributes:
[NSDictionary dictionaryWithObjectsAndKeys:
[UIColor colorWithRed:255.0/255.0 green:255.0/255.0 blue:255.0/255.0 alpha:1.0],
UITextAttributeTextColor,
[UIColor colorWithRed:0.0 green:0.0 blue:0.0 alpha:0.8],
UITextAttributeTextShadowColor,
[NSValue valueWithUIOffset:UIOffsetMake(0, -1)],
UITextAttributeTextShadowOffset,
[UIFont fontWithName:#"Arial-Bold" size:10.0],
UITextAttributeFont,
nil]];
Replace
[self.navigationController.navigationItem.titleView addSubview:testView];
to
self.navigationItem.titleView = testView;
Edit:
Note: You cannot add subviews to titleView cause it's default value is nil, you need to set a new view as the titleView.
Swift 3/4
You may set i.e. UILabel as a titleView. Call it in viewDidLoad():
private func setNavigationTitle(_ title: String) {
navigationItem.title = nil // clear the default title
let titleLabel = UILabel() // you don't need to specify a frame, it will be centred in the navbar
titleLabel.font = ...
titleLabel.textColor = ...
titleLabel.text = title
titleLabel.backgroundColor = .clear
navigationItem.titleView = titleLabel
navigationTitleView = titleLabel // you may create a property if you want to manipulate the title view later
}
Note navigationItem.title = nil, otherwise title may override titleView.
CustomLabel *titleLabel = [CustomLabel initWithLabelFrame:labelFrame textFont:[UIFont fontWithName:#"Helvetica" size:[UIFont systemFontSize]] textColor:[UIColor blackColor] labelText:#"Add as" textAlignment:NSTextAlignmentCenter labelOnView:reference.view labelTag:62];
[self.navigationItem setTitleView:titleLabel]; // titleLabel set in navigationItem
#import <UIKit/UIKit.h>
#interface MasterViewController : UITableViewController
#end
#import "MasterViewController.h"
#interface MasterViewController ()
#end
#implementation MasterViewController
- (void)viewDidLoad {
[super viewDidLoad];
self.navigationItem.titleView = [self titleView];
}
- (UIView *)titleView {
CGFloat navBarHeight = self.navigationController.navigationBar.frame.size.height;
CGFloat width = 0.95 * self.view.frame.size.width;
UIView *containerView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, width, navBarHeight)];
UIImage *logo = [UIImage imageNamed:#"logo.png"];
UIButton *logoButton = [UIButton buttonWithType:UIButtonTypeCustom];
CGFloat logoY = floorf((navBarHeight - logo.size.height) / 2.0f);
[logoButton setFrame:CGRectMake(0, logoY, logo.size.width, logo.size.height)];
[logoButton setImage:logo forState:UIControlStateNormal];
UIImage *bubble = [UIImage imageNamed:#"notification-bubble-empty.png"];
UIImageView *bubbleView = [[UIImageView alloc] initWithImage:bubble];
const CGFloat Padding = 5.0f;
CGFloat bubbleX =
logoButton.frame.size.width +
logoButton.frame.origin.x +
Padding;
CGFloat bubbleY = floorf((navBarHeight - bubble.size.height) / 2.0f);
CGRect bubbleRect = bubbleView.frame;
bubbleRect.origin.x = bubbleX;
bubbleRect.origin.y = bubbleY;
bubbleView.frame = bubbleRect;
[containerView addSubview:logoButton];
[containerView addSubview:bubbleView];
return containerView;
}
#end
You'll want to use storyboard to do this to support iPhone 6 and newer (larger) devices.
Create a container view for your custom navigation item title/subtitle etc, and drag it into the visual editor (not into the view hierarchy).
Swift 3
let myImageView = UIImageView(image: <...set your image...>)
override fun viewDidLoad(){
super.viewDidLoad()
self.navigationItem.titleView = myImageView //
}
One more alternate solution is
override fun viewWillAppear(_ animated: Bool) {
super. viewWillAppear(animated)
self.navigationItem.titleView = myImageView
}
I recommend to use, viewDidLoad to setup your titleView