Is it possible to set up a UITextField with a leftView so that if a user clicks into the UITextField the keyboard shows but if they click on an icon in the leftView another method is called (i.e., one that displays a UIPickerview)?
Have you checked that the leftFieldViewMode is set to something other than never
[textField setLeftViewMode:UITextFieldViewModeAlways];
Instantiate a button as u do normaly
UIButton *btn=[UIButton buttonWithType:UIButtonTypeCustom];
[btn setFrame:CGRectMake(0,0,30,30)];
[btn setTitle:#"title" forState:UIControlStateNormal];
[btn addTarget:self action:#selector(BtnClick) forControlEvents:UIControlEventTouchUpInside];
Instantiate a textfield as you do normally
UITextField *txtfield1=[[UITextField alloc]initWithFrame:CGRectMake(10, 10,300,30)];
[txtfield1 setBackgroundColor:[UIColor grayColor]];
[txtfield1 setPlaceholder:#" Enter"];
To set a view in left side(there is right view also available)
[txtfield1 setLeftView:btn];
if u want the view to show always then below code does it
[txtfield1 setLeftViewMode:UITextFieldViewModeAlways];
if u want the view to show never then
[txtfield1 setLeftViewMode:UITextFieldViewModeNever];
if u want the view to show if the textfield is not edited then below
[txtfield1 setLeftViewMode:UITextFieldViewModeUnlessEditing];
if u want the view to show if the textfield is edited then
[txtfield1 setLeftViewMode:UITextFieldViewModeWhileEditing];
button click event and pop over
-(void)BtnClick
{
//Usual pop over coding goes here
}
Have you tried using a UIButton for this task? From the documentation for the leftView property:
If your overlay view does not overlap
any other sibling views, it receives
touch events like any other view. If
you specify a control for your view,
the control tracks and sends actions
as usual. If an overlay view overlaps
the clear button, however, the clear
button always takes precedence in
receiving events.
So create a UIButton instance, configure its appearance and actions as needed, then set it as the leftView property.
Related
I'm building a menu as a subclass of UIControl that opens when a user touches it and will close if a user doesn't choose one of its options.
I'm looking for a way to track when a user touches outside so that I can close the menu
Put one view behind your menu that cover whole area of your device with background of clear color. when your menu is open make that view visible. as it has same height and width as your device whenever you click outside the menu you can identify that view using TapGesture or make it UIControl. than call method to hide both your menu and that uiview.
Hope this will help.
What I really like to do is to make a big button that covers the entire view, and have it below the menu, or whatever else I want to touch away from and have something happen.
UIButton *bigBackButton = [[UIButton alloc]initWithFrame:self.view.frame];
[bigBackButton addTarget:self action:#selector(backButtonSelected) forControlEvents:UIControlEventTouchDown];
[bigBackButton setBackgroundColor:[UIColor colorWithRed:0 green:0 blue:0 alpha:0.5]];
[self.view addSubview:bigBackButton];
}
- (void)backButtonSelected:(UIButton *)button {
//get rid of the button
[button removeFromSuperview];
//do whatever else you need to do
[yourmenu dosomething];
}
on some apps, I'll make the button dark and translucent to highlight the menu, whatever else. Other times I'll make it pretty much invisible, like [UIColor colorWithWhite:1.0 alpha:0.01];
in your menu routine you could add these same routines. You could pass the frame of the parent view, or just look it up in the layoutSubviews routine, if your menu is a sublcass of a UIView.
in your layoutSubviews, add this:
UIButton *bigBackButton = [[UIButton alloc]initWithFrame:self.superview.frame];
[bigBackButton addTarget:self action:#selector(backButtonSelected) forControlEvents:UIControlEventTouchDown];
[bigBackButton setBackgroundColor:[UIColor colorWithRed:0 green:0 blue:0 alpha:0.5]];
[self.view addSubview:bigBackButton];
and then put the backButtonSelected method in your menu class as well.
So I have a UIView which I call ctrView and this ctrView is added to my UIViewController's view. It's basically just a smaller rectangular frame inside. And I added a UIButton on the top right corner of this container view, however it seems that when clicking on the UIButton area which is a bit outside of the ctrView doesn't trigger the action tied to the button. Only the UIButton area that is inside the container view triggers the action. How do I resolve this weird issue?
UIButton *closeButton = [[UIButton alloc] initWithFrame:CGRectMake(0, 0, 100, 100)];
[closeButton setImage:[UIImage imageNamed:#"close.png"] forState:UIControlStateNormal];
[closeButton setBackgroundColor:[UIColor clearColor]];
[closeButton addTarget:self action:#selector(closeZoomedImageView) forControlEvents:UIControlEventTouchUpInside];
[closeButton setCenter:CGPointMake(ctrView.frameX + ctrView.frameWidth - 30, ctrView.frameY - 15)];
[ctrView addSubview:closeButton];
[closeButton release];
This is the normal behavior, views outside the bound of the parent will not receive touch actions
In order to fix this, rearrange the views like following
Main view will be big enough to accomodate the internal view and the closebutton, the backGroundColor of this view will be clear color
Internal view will be the view that will the internal view that will have the image and or the content of your normal view
Main view will have both the internal view and the close button as its childern
Main view will be big enough to accomodate the button
Main view will have a clear color background so that it will not affect the layout
So you will add all the views you currently have inside the internal view,
The internal view and the button view will both be added to the main view
you present then the main view to the viewcontroller
Is it possible to make the navigationcontroller title a button? but without a button look to it. I want it to be just text that if you click on it a view/actionsheet pops up from the bottom
If so, can you show me programmatically how I would make it a button?
Thanks
You can set TitleView of navigationItem to set a button as title.
Here is what i tried and got it working:
UIButton*button=[UIButton buttonWithType:UIButtonTypeRoundedRect];
button.frame=CGRectMake(0, 0, 30, 20);
[button setTitle:#"Testing" forState:UIControlStateNormal];
[button addTarget:self action:#selector(btnAction) forControlEvents:UIControlEventTouchUpInside];
[[self navigationItem] setTitleView:button];
But if you don't want it to look like a button, you have set the buttonWithType to custom and set its backGroundImage property.
in btnAction have your code to show the pop ups.
I have a UITableViewController, when there is no data to populate the UITableView, I want to add a button, which uses an image. So, rather than the user seeing a tableview with no records, they will see an image that says, "No records have been added, Tap to add one", then they click and we create a new one.
I assumed I would just hide the UITableView, then create the button, but I never see the button. Here I am using:
if ([[fetchedResultsController sections] count] == 0) {
self.tableView.hidden = YES;
// Create button w/ image
UIButton * btn = [UIButton buttonWithType:UIButtonTypeRoundedRect];
btn.frame = CGRectMake(0, 0, 100, 50);
[btn setImage:[UIImage imageNamed:#"no-rides.png"] forState:UIControlStateNormal];
[self.view addSubview:btn];
}
Ideas on why I would never see the button? When I show this view, it seems to have a transparent background for a second, then changes white...
I am not sure if it works but you can try this:
If your view controller is not a UITableViewController and it contains a UITableView
[self.tableView removeFromSuperview]; then [self.view addSubview];
If your view controller is a UITableViewController, you may need to consider to set the first row to contain the image and text. Then, you can handle the event: tableView:didSelectRowAtIndexPath: and if user click on the first cell, you trigger the method handle the button event
In a UITableViewController, self.view could be self.tableView in which case hiding the table would also hide the button. Try using a custom UIViewController and creating either the table or the button as a subview of self.view instead.
Alternately, when there is no data, you can create a single custom cell containing your button and use that instead of normal cells.
I believe you can add the button to the table footer, as the table footer is shown even when there are no cells. (Note, this is different to a section footer.)
By default the tableFooterView property of the UITableView is nil. So just create your button, and then do:
self.tableView.tableFooterview = btn;
For all future travelers, I simply set .userInteraction = true (Swift) and it worked like a charm. All in all:
tableView.backgroundView = constructMyViewWithButtons()
tableView.backgroundView!.userInteraction = true
I'm trying to add a UIButton to a UIView, but am having some trouble with getting it to respond to touches.
I have a method which returns UIButtons after I provide it with a tag:
- (UIButton*)niceSizeButtonWithTag:(int)tag {
UIButton * aButton = [UIButton buttonWithType:UIButtonTypeCustom];
[aButton setTag:tag];
[aButton addTarget:self action:#selector(buttonWasTapped:) forControlEvents:UIControlEventTouchUpInside];
CGRect newFrame = aButton.frame;
newFrame.size.width = 44;
newFrame.size.height = 44;
[aButton setFrame:newFrame];
return aButton;
}
As you can see I'm creating a new button and increasing the size.
I use this in the following way:
UIButton * anotherButton = [self niceSizeButtonWithTag:1];
[anotherButton setImage:[UIImage imageNamed:#"image" withExtension:#"png"] forState:UIControlStateNormal];
[anotherButton setCenter:CGPointMake(middleOfView)];
[aView addSubview:anotherButton];
I create a lot of buttons like this, hence the reason for the method.
The buttons are always created and added to the subview perfectly. I can see the image and they're in the correct position. The problem is that they only respond to touches in a tiny strip.
In this attached image,
alt text http://web1.twitpic.com/img/107755085-5bffdcb66beb6674d01bb951094b0e55.4c017948-full.png
The yellow shows the whole frame of the button,
The red shows the area that will respond to touches.
The grey shows a section of the view the button is added to.
If anyone could shed some light on why this is happening, it would be really useful.
UPDATE:
I should probably mention I'm trying to add this button to a UIView which is a subview of a UITableViewCell.
UPDATE 2:
Adding it directly to the UITableViewCell works, adding it to the UIView on the UITableViewCell is causing the error.
FINAL UPDATE
The problem turned out to be that I was sending the view containing the button to the back of the subviews on the UITableViewCell. Getting rid of the sendSubviewToBack: call fixed it.
Do you have any other views added to this containing view after you add the button? try setting some of your view's background color to blueColor, redColor and other colors to better see what the stack of views in your app is like. Then you should be easily able to see if there is some sort of view blocking the button.