I want to implement tablecell in which there is one label with text = 0 and two button with text '+' and '-'
when i click + button then i want to increment text label by one.
when i click - button then i want to decrement text label by one.
Any idea how to change the label of uitablecell.
Thanks in advance.
- (UITableViewCell *) getCellContentView:(NSString *)cellIdentifier{
UIButton * mp;
UILabel *l1;
UITableViewCell *cell=[[[UITableViewCell alloc]initWithFrame: CGRectMake(0, 0, 300, 60) reuseIdentifier:nil] autorelease];
l1=[[UILabel alloc] initWithFrame:CGRectMake(100.0, 15.0, 400.0, 40.0)];
l1.tag=1;
l1.font=[UIFont fontWithName:#"AppleGothic" size:17];
l1.textColor=[UIColor blackColor];
l1.backgroundColor=[UIColor clearColor];
l1.numberOfLines=3;
[cell.contentView addSubview:l1];
[l1 release];
mp=[[UIButton alloc] initWithFrame:CGRectMake(250, 25, 50, 20)];
mp.tag=2;
mp.font=[UIFont boldSystemFontOfSize:14];
mp.textColor=[UIColor blueColor ];
[mp addTarget:self action:#selector(mapbtnpressed:) forControlEvents:UIControlEventTouchUpInside];
[cell.contentView addSubview:mp];
[mp release]
return cell;
}
in a cellForRowAtIndexPath method u call
cell=[self getCellContentView:CellIdentifier];
labelname=(UILabel *)[cell viewWithTag:1];
[cell.contentView addSubview:labelname];
click event
+
labelname.text=[NSString stringWithFormat:#"%d",[lanename.text intvalue]+1];
-event
labelname.text=[NSString stringWithFormat:#"%d",[lanename.text intvalue]-1];
Look at this page of documentation. Especially, Listing 5-3. The basic idea is that all custom subviews should be added to contentView of your table cell.
Try using setText: method of UILabel
[urLabel setText:newText];
- (IBAction)plusButtonPressed
{
int value = [urLabel.text intValue];
value++;
[urLabel setText:[NSString stringWithFormat:#"%d",value]];
}
Related
Everything works well in iOS 9.
But in iOS 8, the content is not displayed, only imageview is showed.
What i did is that I create a view and add label and UIImage to that view. Then that view is added to contentView of table Cell
create View
- (UIView *)getHeaderView:(UITableView *)tableView viewForHeaderInSection:(NSInteger)section
{
UIView *view = [[UIView alloc] initWithFrame:CGRectMake(0, 0, tableView.frame.size.width, HEADER_SECTION_HEIGHT)];
[view setBackgroundColor:[[RNThemeManager sharedManager] colorWithHexString:[_themeComponent valueForKey:#"Layer1Color"]]];
UILabel *taskName = [[UILabel alloc] initWithFrame:CGRectMake(5.0, SECTION_BREAK+3.0, view.frame.size.width-23.0, 20)];
[taskName setFont:[UIFont boldSystemFontOfSize:[[_themeComponent valueForKey:#"RegularFontSize"] intValue]]];
[taskName setText:combinedTask.taskDescription];
[taskName setTextColor: [[RNThemeManager sharedManager] colorWithHexString:[_themeComponent valueForKey:#"textPrimary"]]];
[view addSubview:taskName];
UIImageView *addressView = [[UIImageView alloc]initWithFrame:CGRectMake(5.0, SECTION_BREAK+28.0, 20, 20)];
addressView.image = [UIImage imageNamed:[NSString stringWithFormat:#"%#.png", #"Attr_Pin"]];
[view addSubview:addressView];
UILabel *address = [[UILabel alloc] initWithFrame:CGRectMake(35.0, SECTION_BREAK+23.0, view.frame.size.width-35.0, 30)];
[address setFont:[UIFont boldSystemFontOfSize:[[_themeComponent valueForKey:#"SmallFontSize"] intValue]]];
address.lineBreakMode = NSLineBreakByWordWrapping;
address.numberOfLines = 0;
[address setText:[NSString stringWithFormat:#"%#", unit]];
[address setTextColor: [[RNThemeManager sharedManager] colorWithHexString:[_themeComponent valueForKey:#"textPrimary"]]];
[view addSubview:address];
return view;
}
Add view to table cell
UIView *header= [self getHeaderView:tableView viewForHeaderInSection:section];
cell.taskIdLabel.hidden = YES;
[cell.contentView addSubview:header];
Anyone has any ideas? Thanks much for your help.
This is because iOS 9 Apple handle good autolayout than before.
Let add [cell layoutIfNeeded] before return cell.
Update
I have same problem before. Here is block of code that i use to solved my problem.
- (void) sizeHeaderToFit {
//call in viewLayoutSubView
UIView *myHeaderView = self.tableView.tableHeaderView;
[myHeaderView setNeedsLayout];
[myHeaderView layoutIfNeeded];
CGFloat height = [myHeaderView systemLayoutSizeFittingSize:UILayoutFittingCompressedSize].height;
myHeaderView.frame = ({
CGRect headerFrame = myHeaderView.frame;
headerFrame.size.height = height;
headerFrame;
});
self.tableView.tableHeaderView = myHeaderView;
}
call it at viewDidLayoutSubView. Hope it helps bạn :))
I found a way to add two lines of text on a UIButton,
but what I want is that each of these lines of texts
have different font (for instance one is bold, other not).
How is it possible to do this?
Thanks.
You should add 2 UILabel to the UIButton as subviews.
You can do it like:
UIButton *testButton = [UIButton buttonWithType:UIButtonTypeCustom];
testButton.frame = CGRectMake(0, 0, 200, 40);
[self.view addSubview:testButton];
UILabel *firstLineTestButton = [[UILabel alloc] initWithFrame:CGRectMake(0, 0, 200, 20)];
firstLineTestButton.text = #"First line";
firstLineTestButton.font = [UIFont systemFontOfSize:12];
[testButton addSubview:firstLineTestButton];
UILabel *secondLineTestButton = [[UILabel alloc] initWithFrame:CGRectMake(0, 20, 200, 20)];
secondLineTestButton.text = #"Second line";
secondLineTestButton.font = [UIFont boldSystemFontOfSize:12];
[testButton addSubview:secondLineTestButton];
To also make highlighting possible for the UILabels, you need to make the highlighting of the button custom.
So add the actions to the button and then check the button subviews for the labels and change their colors.
[testButton addTarget:self action:#selector(buttonAction:) forControlEvents:UIControlEventTouchUpInside];
[testButton addTarget:self action:#selector(changeColor:) forControlEvents:UIControlEventTouchDown];
[testButton addTarget:self action:#selector(touchCancel:) forControlEvents:UIControlEventTouchDragExit];
-(void)buttonAction:(UIButton*)sender
{
[self touchCancel:sender];
/* DO SOME MORE ACTIONS */
}
-(void)changeColor:(UIButton*)sender
{
sender.backgroundColor = [UIColor grayColor];
for( UIView *subview in sender.subviews ){
if( [subview isKindOfClass:[UILabel class]] ){
UILabel *subViewLabel = (UILabel*)subview;
subViewLabel.textColor = [UIColor blueColor];
}
}
}
-(void)touchCancel:(UIButton*)sender
{
sender.backgroundColor = [UIColor clearColor];
for( UIView *subview in sender.subviews ){
if( [subview isKindOfClass:[UILabel class]] ){
UILabel *subViewLabel = (UILabel*)subview;
subViewLabel.textColor = [UIColor blackColor];
}
}
}
The solution of Roland is good, another way to do this would be to use a NSAttributedString. The downside is, that it only works in iOS 6 and above.
If this is not a problem, here is the code
- (void)viewDidLoad
{
[super viewDidLoad];
// We want 2 lines for our buttons' title label
[[self.button titleLabel] setNumberOfLines:2];
// Setup the string
NSMutableAttributedString *titleText = [[NSMutableAttributedString alloc] initWithString:#"This should be bold,\n and this should not."];
// Set the font to bold from the beginning of the string to the ","
[titleText addAttributes:[NSDictionary dictionaryWithObject:[UIFont boldSystemFontOfSize:14] forKey:NSFontAttributeName] range:NSMakeRange(0, 20)];
// Normal font for the rest of the text
[titleText addAttributes:[NSDictionary dictionaryWithObject:[UIFont systemFontOfSize:14] forKey:NSFontAttributeName] range:NSMakeRange(20, 22)];
// Set the attributed string as the buttons' title text
[self.button setAttributedTitle:titleText forState:UIControlStateNormal];
}
You can add two UILabels as subview of the button and then can set the text of the labels as
[lbl1 setFont:[UIFont fontWithName:#"Arial-Bold" size:18]];
[lbl2 setFont:[UIFont fontWithName:#"Arial" size:16]];
For proper animation, you should subclass UIButton and redraw it when its state changes.
(void)drawRect:(CGRect)rect
{
if (!self.firstLineTestButton) {
self.firstLineTestButton = [[UILabel alloc] initWithFrame:CGRectMake(0, 0, 200, 20)];
self.firstLineTestButton.text = #"First line";
self.firstLineTestButton.font = [UIFont systemFontOfSize:12];
[self addSubview:self.firstLineTestButton];
}
if (!self.secondLineTestButton) {
self.secondLineTestButton = [[UILabel alloc] initWithFrame:CGRectMake(0, 20, 200, 20)];
self.secondLineTestButton.text = #"Second line";
self.secondLineTestButton.font = [UIFont boldSystemFontOfSize:12];
[self addSubview:self.secondLineTestButton];
}
if (!self.highlighted) {
// Do custom drawing such as changing text color
} else {
// Do custom drawing such as changing text color
}
}
(void)setHighlighted:(BOOL)highlighted {
[super setHighlighted:highlighted];
// Force redraw of button
[self setNeedsDisplay];
}
I am working on the basics of iOS development.
So far I have a button that on press, will show some text. But what I want to do is after it is pressed, I want it to then change the text of the button, so far this is what I have:
- (void)viewDidLoad
{
[super viewDidLoad];
UIButton *button = [UIButton buttonWithType:UIButtonTypeRoundedRect];
//button.backgroundColor = [UIColor redColor];
button.titleLabel.textColor=[UIColor blackColor];
button.frame = CGRectMake(25, 100, 275, 60);
[button setTitle:#"Press this button to reveal the text!" forState:UIControlStateNormal];
[button addTarget:self action:#selector(button_method:) forControlEvents:UIControlEventTouchUpInside];
[self.view addSubview:button];
// Do any additional setup after loading the view, typically from a nib.
}
- (void)button_method:(UIButton *)sender {
NSString *test = #"I am learning Objective-C for the very first time! Also, this is my first ever variable!";
// handle button press
UILabel *label = [[UILabel alloc] initWithFrame:CGRectMake(25, 25, 275, 60)];
label.text = test;
label.numberOfLines = 0;
label.lineBreakMode = UILineBreakModeWordWrap;
//label.lineBreakMode = NSLineBreakByWordWrapping; //iOS 6 only
[self.view addSubview:label];
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
When I try adding [button setTitle:#"You pressed the button"]; to button_method
This doesn't work... why? And how would I make it work?
When I try adding [button setTitle:#"You pressed the button"]; to button_method, it doesn't work... why?
Because that method is nonexistent on UIButton.
And how would I make it work?
By using a method that UIButton actually responds to. For example:
[sender setTitle:#"You pressed the button" forState:UIControlStateNormal];
And read the relevant documentation, please.
Your code will not change the title of the button. But simply add a label as a subview for your view. Is this what you want?
If you want to change the text on the button you will want to do sender.title.text = test; in your button_method
I also recommend adding a NSLog(#"Button pressed"); to your button press method to double check that it is being called.
I have a view with a generic rounded rect button that segues to another view. When users press the rounded rect it starts a fetch. I would like to have a spinning wheel replace the text ("Next") inside the rounded rect button while the fetch is processed.
I created the spinner:
UIActivityIndicatorView *spinner = [[UIActivityIndicatorView alloc] initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleGray];
[spinner startAnimating];
But I don't know how to make it replace the text in the rounded rect button.
Any suggestion? Thank you.
Create (or get a reference to) the button as usual, then, while handling the button click, create your spinner and set it as a subview of the button. It's probably also worth disabling the button to stop multiple clicks.
Something along the following lines should do the trick:
...
UIButton *button = [UIButton buttonWithType:UIButtonTypeRoundedRect];
button.frame = CGRectMake(10, 10, 70, 40);
[button setTitle:#"Next" forState:UIControlStateNormal];
[button addTarget:self action:#selector(click:) forControlEvents:UIControlEventTouchUpInside];
[self.view addSubview:button];
...
- (void)click:(UIButton *)button {
[button setTitle:#"" forState:UIControlStateNormal];
UIActivityIndicatorView *spinner = [[UIActivityIndicatorView alloc] initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleGray];
[spinner startAnimating];
spinner.frame = button.bounds;
[button addSubview:spinner];
button.enabled = NO;
// do your actual work...
}
I wrote a category that utilizes associated objects
UIButton+ActivityIndicator.h
// Created by reynaldo on 1/16/14.
#import <Foundation/Foundation.h>
#interface UIButton (ActivityIndicator)
- (void)startActivityIndicator;
- (void)stopActivityIndicator;
#end
UIButton+ActivityIndicator.m
// Created by reynaldo on 1/16/14.
#import <objc/runtime.h>
#import "UIButton+ActivityIndicator.h"
static char TITLE_KEY;
static char ACTIVITY_INDICATOR_KEY;
#implementation UIButton (ActivityIndicator)
- (void)startActivityIndicator {
objc_setAssociatedObject(self, &TITLE_KEY, self.currentTitle, OBJC_ASSOCIATION_RETAIN_NONATOMIC);
[self setTitle:#"" forState:UIControlStateNormal];
UIActivityIndicatorView *activityIndicatorView = [[UIActivityIndicatorView alloc] initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleWhite];
[self addSubview:activityIndicatorView];
activityIndicatorView.frame = CGRectMake(self.frame.size.width / 2, self.frame.size.height / 2. - 2, 7, 7);
[activityIndicatorView startAnimating];
objc_setAssociatedObject(self, &ACTIVITY_INDICATOR_KEY, activityIndicatorView, OBJC_ASSOCIATION_RETAIN_NONATOMIC);
}
- (void)stopActivityIndicator {
NSString *title = objc_getAssociatedObject(self, &TITLE_KEY);
UIActivityIndicatorView *activityIndicatorView = objc_getAssociatedObject(self, &ACTIVITY_INDICATOR_KEY);
if(activityIndicatorView) {
[activityIndicatorView removeFromSuperview];
}
if(title.length) {
[self setTitle:title forState:UIControlStateNormal];
}
}
#end
I just want to be able to add a label to parent view dynamically i.e just by pressing a button.Not a real world application just learning.
Here is cut down version of the method it executes but can not see the label.
- (IBAction)addLabelToParentView
{
NSLog(#"button click");
UILabel* label ;
[label setText:#"test"];
[[self view] addSubview:label];
}
You need to initialize your label with a frame rectangle. Try the code below.
- (IBAction)addLabelToParentView
{
NSLog(#"button click");
UILabel* label = [[UILabel alloc] initWithFrame:CGRectMake(20.0, 20.0, 280.0, 30.0)];
[label setText:#"test"];
[[self view] addSubview:label];
}