Im new to iphone development.here i added some list of names in pickerview.the action of pickerview was given to button in view. now i want to show.when click the button pickerview list was displayed i selected one name regarding in pickerview that name was displayed at button in view. I dont no how to change the title in button in iphone.
Can any one plz give me information for my problem.
thank you in advance.
You should be able to change the title of a UIButton by calling setTitle. Just remember to set it for all the states of the IUIButton. Here is an example:
[button setTitle:#"Normal Title" forState:UIControlStateNormal];
[button setTitle:#"Highlighted Title" forState:UIControlStateHighlighted];
declare your button and make property of your button in .h file
UIButton *btnl;
#property(nonatomic,retain) IBOutlet UIButton *btnl;
and make connection from IB.
Now in .m file,
use this delegate method of you picker
- (void)pickerView:(UIPickerView *)pickerView didSelectRow:(NSInteger)row inComponent:(NSInteger)component
{
btn.text=[yourArrayOfPickerContent objectAtIndex:row];
}
To change the custom button title use this:
UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom];
button.frame = CGRectMake(82,203,129,45);
[button setTitle:#"btnTitle" forState:UIControlStateNormal];
[button addTarget:self action:#selector(buttonPressed:) forControlEvents:UIControlEventTouchUpInside];
[self.view addSubview:button];
[self.view bringSubviewToFront:button];
To change button title,
button.titleLabel.text=#"String";
You should Code in the pickerView delegate
- (void)pickerView:(UIPickerView *)pickerView didSelectRow:(NSInteger)row inComponent:(NSInteger)component
This way you can code about UIButton and can set the title to it.
UIButton *btn = [UIButton buttonWithType:UIButtonTypeCustom];
[btn setFrame:CGRectMake(0.0f, 4.0f, 90.0f, 20.0f)];
[btn setBackgroundColor:[UIColor clearColor]];
UIImage *backgroundView = [UIImage imageNamed:#"btn.png"];
[btn setBackgroundImage:backgroundView forState:UIControlStateNormal];
[btn setTitle:#"buttonName" forState:UIControlStateNormal];
[btn setTitleColor:[UIColor whiteColor] forState:UIControlStateNormal];
first you need to create a pointer of type UIButton as IBOutlet in your view controller and than connect that button to the one in IB.
when you want to change the name of title just do
button.titleLabel.text = [NSString stringWithString:yourString];
Related
I am new to iOS development and I have a problem with UIScrollView. First of all, I've created a Scroll View in a storyboard and added
#property (retain, nonatomic) IBOutlet UIScrollView *mainScroll;
in view controller handler
In the viewDidLoad method I have the following code:
- (void)viewDidLoad
{
[super viewDidLoad];
self.mainScroll.contentSize = CGSizeMake(100.0,100.0); // Have to set a size here related to your content.
// You should set these.
self.mainScroll.autoresizingMask = UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight;
self.mainScroll.minimumZoomScale = .5; // You will have to set some values for these
self.mainScroll.maximumZoomScale = 2.0;
self.mainScroll.zoomScale = 1;
UIButton* b = [[UIButton alloc] init];
[b setBounds:CGRectMake(.0f,0.f,100.0,100.0)];
[self.mainScroll addSubview:b];
}
But the button does not appear in the simulator. However if I add a button on storyboard in the IB, the button appears and I can scroll the view.
How can I add the button in code?
Try this code
UIButton *button = [UIButton buttonWithType:UIButtonTypeRoundedRect];
[button setTitle:#"Show View" forState:UIControlStateNormal];
button.frame = CGRectMake(80.0, 210.0, 160.0, 40.0);
[self.mainScroll addSubview:button];
bounds and frame are not the same thing.
Use this code instead...
UIButton *button = [UIButton buttonWithType:UIButtonTypeRoundedRect];
[button setTitle:#"Hello" forState:UIControlStateNormal];
button.frame = CGRectMake(0, 0, 100, 44);
[self.mainScroll addSubview:button];
You need to set scroll view contents size, something like the following code.
[self.mainScroll setContentSize:CGSizeMake(width, height)];
Try this :
UIButton *button = [UIButton buttonWithType:UIButtonTypeRoundedRect];
[button setTitle:#"Hello" forState:UIControlStateNormal];
button.frame = CGRectMake(self.mainScroll.frame.origin.x + 25 ,self.mainScroll.frame.origin.y +25, 50, 44);
[self.mainScroll addSubview:button];
Best and easiest way to make a button from code is:
UIButton* yourButton = [[UIButton alloc]initWithFrame:CGRectMake(x, y, width, height)];
[yourButton setTitle:#"Your Title" forState:UIControlStateNormal];
// if you set the button's image the title won't be visible, because button's title is "under" the image. I recomend you to use this if you have a cut and dried image.
[yourButton setImage:[UIImage imageNamed:#"yourImage.png"] forState:UIControlStateNormal];
// if you set the button's background image, button's title will be visible
[yourButton setBackgroundImage:[UIImage imageNamed:#"yourBackgroundImage.png"] forState:UIControlStateNormal];
// you can add target to the button, for handle the event when you touch it.
[yourButton addTarget:self action:#selector(handleToucUpInside:) forControlEvents:UIControlEventTouchUpInside];
// then add the button
[self.view addSubview:yourButton];
- (void) handleToucUpInside:(id)sender{
// here you can do anything you want, to handle the action
}
I have created an image button (a.png) infront of each row in the cellForRow method. In the same method itself I'm calling a buttonPressed method which has the code to be executed when the button is pressed. And I want that on the pressing of the button, the button image should be changed to another image (b.png) of the same size.
Please help with how to do that.
[but setBackgroundImage:[UIImage imageNamed:#"a.png"] forState:UIControlStateNormal];
[but setBackgroundImage:[UIImage imageNamed:#"b.png"] forState:UIControlStateSelected];
try this......
Create Custom Cell for UITableView and UIButton on Custom Cell.
Create property for UIButtion.
In cellForRowAtIndexPath: method
//Set Action on Button in Table View Row
[cell.UIButtonOutlet addTarget:self action:#selector(checkButtonTapped:event:) forControlEvents:UIControlEventTouchUpInside];
This will create action from your button.
And in method
-(void)checkButtonTapped:(id)sender event:(id)event
{
NSSet *touches=[event allTouches];
UITouch *touch=[touches anyObject];
CGPoint currentTouchPosition = [touch locationInView:self.historyTableView];
//GET IndexPath
NSIndexPath *indexPath=[self.TableView indexPathForRowAtPoint: currentTouchPosition];
selectedCell= [PairTableView cellForRowAtIndexPath:indexPath];
[selectedCell.UIButtonOutlet setImage:[UIImage imageNamed:#"a.png"] forState:UIControlStateNormal];
Try the following method
UIButton *button = [UIButton buttonWithType:UIButtonTypeContactAdd];
[button setFrame:CGRectMake(12,12,200,200)];
[button addTarget:self action:#selector(click: withEvent:) forControlEvents:UIControlEventTouchUpInside];
[button setTag:indexPath.row];
[button setBackgroundImage:[UIImage imageNamed:#"a.png"] forState:UIControlStateNormal];
[cell.contentView addSubview:button];
then in the click action method of button
-(void)click:(UIButton *)button :withEvent:(UIEvent *)events{
[self yourFunction:(UIButton *)button];
}
then finally
-(void)yourFunction:(UIButton *)button{
button.selected = ! button.selected;
if (button.selected) {
[button setBackgroundImage:[UIImage imageNamed:#"a.png"] forState:UIControlStateNormal];
}
else{
[button setBackgroundImage:[UIImage imageNamed:#"b.png"] forState:UIControlStateNormal];
}
}
Try this when initializing your button
UIButton *button=[UIButton buttonWithType:UIButtonTypeCustom];
[button setImage:[UIImage imageNamed:#"a.png"] forState:UIControlStateNormal];
Then modify your method(which is called when button is pressed) like this
-(void)yourMethod:(id)sender{
UIButton *btn=(UIButton*)sender;
[btn setImage:[UIImage imageNamed:#"b.png"] forState:UIControlStateNormal];
//your other code
}
I am creating a custom button and putting it in my table's footer view but the button is going way out from the right corner.
What is wrong here!?!
Here is my code and output image:
UIButton *aButton = [UIButton buttonWithType:UIButtonTypeCustom];
[aButton setTitleColor:[UIColor whiteColor] forState:UIControlStateNormal];
[aButton setTitleColor:[UIColor colorWithWhite:0.0 alpha:0.56] forState:UIControlStateDisabled];
[aButton setBackgroundImage:[[UIImage imageNamed:#"test.png"] stretchableImageWithLeftCapWidth:kButtonSliceWidth topCapHeight:0] forState:UIControlStateNormal];
[aButton setTitle:#"Click me" forState:UIControlStateNormal];
[aButton.titleLabel setFont:[UIFont boldSystemFontOfSize:kFontSize14]];
[aButton setFrame:CGRectMake(10.0, 15.0, 300.0, 44.0)];
[self.tableView setTableFooterView:aButton];
I added the button in the UIView and then set the tableFooterView to this UIView object and it worked. We cannot directly put UIButton as tableFooterView.
Try doing like this. Set IBOutlet UIView *footerView; and synthesize it. Add it as a subview using the method-
- (UIView *)tableView:(UITableView *)tableView viewForFooterInSection:(NSInteger)section {
if(footerView == nil) {
//allocate the view if it doesn't exist yet
footerView = [[UIView alloc] init];
//create the button
UIButton *button = [UIButton buttonWithType:UIButtonTypeRoundedRect];
[button setFrame:CGRectMake(10, 3, 300, 44)];
//set title, font size and font color
[button setTitle:#"Click Me" forState:UIControlStateNormal];
[button.titleLabel setFont:[UIFont boldSystemFontOfSize:18]];
//set action of the button
[button addTarget:self action:#selector(clickPressed:)
forControlEvents:UIControlEventTouchUpInside];
//add the button to the view
[footerView addSubview:button];
}
//return the view for the footer
return footerView;
}
One important addition to Legolas' fine answer: You'll need to implement the tableView delegate method:
- (CGFloat)tableView:(UITableView *)tableView heightForFooterInSection:(NSInteger)section {
foot 50;
}
This was driving me nuts because the button (or, in my case, buttons) were not responding to the touch event. Adding the delegate method made it all better. :-)
I have a UITableView with three section. I have a custom UITableViewCell. I want to put a button in the first section of my table view to handle an action.
How to can do this please?
just create the button programmatically
UIButton *button = [UIButton buttonWithType:UIButtonTypeRoundedRect];
[button addTarget:self
action:#selector(aMethod:)
forControlEvents:UIControlEventTouchDown];
[button setTitle:#"Show View" forState:UIControlStateNormal];
button.frame = CGRectMake(80.0, 210.0, 160.0, 40.0);
[view addSubview:button];
You can also put the button directly into a UITableViewCell which is located in your first section. In your cellForRowAtIndexPath you can use for example:
UIButton *yourButton = [UIButton buttonWithType:UIButtonTypeRoundedRect];
[yourButton setTitle:#"Click me" forState:UIControlStateNormal];
[yourButton setFrame: CGRectMake( 20.0f, 3.0f, 280.0f, 33.0f)];
[yourButton addTarget:self action:#selector(clickAction) forControlEvents:UIControlEventTouchUpInside];
[cell addSubview:yourButton];
This example will look like this:
and will be places directly in the cell.
If you want to put it in the section header (rather than a cell), you could:
- (UIView *)tableView:(UITableView *)tableView viewForHeaderInSection:(NSInteger)section
{
if(section==0)
{
// create button and return it
}
}
i need to place a check box in UItableview.
For that i place a box with out check image is place on button.
my code is,
UIButton *customButton = [UIButton buttonWithType:UIButtonTypeCustom];
customButton.frame=CGRectMake(100, 10, 100, 100);
[customButton setImage:[UIImage imageNamed:#"unselected.png"] forState:UIControlStateNormal];
[cell.contentView addSubview:customButton];
Now i need to change button image when button clicked.
where can i done this.
and how can i impalement this.
can any one please help me.
Thank u in advance.
//add this line
[customButton addTarget:self action:#selector(buttonClicked:) forControlEvents:UIControlEventTouchUpInside];
//then
-(void) buttonClicked:(id) sender
{
UIButton * button = (UIButton*) sender;
[button setImage:[UIImage imageNamed:#"selected.png"] forState:UIControlStateNormal];
}
You can write this line of code
[customButton setImage:[UIImage imageNamed:#"unselected2.png"] forState:UIControlEventTouchDown];
before
[cell.contentView addSubview:customButton];
and you ca select different images for different events and states