I've created a UIButton on a view and on action of the UIButton[UIButton* button1_obj] one more button[UIButton* button2_obj] is created on same view.
i'm facing these 2 issues...please guide me how to proceed.
button1_obj is appearing when i run my project, but its not being clicked or highlighted, nor any exception is thrown.
On action of button1_obj , button2-obj has to appear on the same view, how to clear the view before placing button2_obj on it.
Code for question (1):
-(void)start
{
NSLog(#"--------------------------------------------------------------------");
NSLog(#"Entered CView start");
//define size and position of view
subMainView_G_obj = [[UIView alloc] initWithFrame:CGRectMake(0.0, 0.0, 480, 320)]; //initilize the view
//subMainView_G_obj.autoresizesSubviews = YES; //allow it to tweak size of elements in view
UIButton_G_obj = [[UIButton buttonWithType:UIButtonTypeRoundedRect] retain];
UIButton_G_obj.frame = CGRectMake(100,70, 150, 50);
UIButton_G_obj.backgroundColor = [UIColor clearColor];
//UIButton_G_obj.adjustsImageWhenHighlighted = YES;
[UIButton_G_obj setTitle:#"UI" forState:UIControlStateNormal];
[UIButton_G_obj addTarget:self action:#selector(action:) forControlEvents:UIControlEventTouchUpInside];
[subMainView_G_obj addSubview:UIButton_G_obj];
UIButton_G_obj = [[UIButton buttonWithType:UIButtonTypeRoundedRect] retain];
UIButton_G_obj.frame = CGRectMake(100,150, 150, 50);
UIButton_G_obj.backgroundColor = [UIColor clearColor];
UIButton_G_obj.adjustsImageWhenHighlighted = YES;
[UIButton_G_obj setTitle:#"Configuration" forState:UIControlStateNormal];
[UIButton_G_obj addTarget:self action:#selector(action:) forControlEvents:UIControlEventTouchUpInside];
[subMainView_G_obj addSubview:UIButton_G_obj];
NSLog(#"Leaving CView start");
NSLog(#"--------------------------------------------------------------------");
}
- (void)action:(id) sender
{
NSLog(#"Inside action method.. On click of First View");
buttonUIObj = [[UIButton buttonWithType:UIButtonTypeRoundedRect] retain];
buttonUIObj.frame = CGRectMake(100,160,100,50);
[buttonUIObj setTitle:#"Next View" forState:UIControlStateNormal];
buttonUIObj.backgroundColor = [UIColor clearColor];
[subMainView_G_obj addSubview:buttonUIObj];
}
i've declare UIButton_G_obj,buttonUIObj,subMainView_G_obj GLOBALLY.
Hard to know what the problem with button1_obj is, without seeing code. However, for (2), you will probably want to remove button1_obj by calling [button1_obj removeFromSuperview].
About problem 1:
First of all both your buttons are named the same. Therefore you have a memory leak because your are allocating space for your button twice. Use different names for your buttons.
About problem 2:
You could hide button 2 until button 1 is pressed: In -(void)start
UIButton_G_obj_1.tag = 1;
...
UIButton_G_obj_2.hidden = YES;
UIButton_G_obj_2.tag = 2;
And in the action method you can unhide the button:
if (sender.tag == 1) {
UIButton_G_obj_2.hidden = NO;
}
Related
I'm making an app. My app is based off this sample project. https://github.com/yeahdongcn/RSCircaPageControl
In the app there is a view. On the view, there is a scroll view (UIScrollView *scrollView) which allows to 10 "pages" of content. Within each page, there is another scroll view (UIScrollView *sv) which is a subview of *scrollView.
On SV, I then added a button called UIButton *button. When I attempt to change the button's images after a time of "two minutes," nothing happens. This is because there are 10 buttons. I need to change the image of the button on only one of the pages. Not all of them.
Something tells me it needs "object at index" or something to specify which button on which page I want to change.
The code is below! Thanks guys!
- (void)viewDidLoad
{
[super viewDidLoad];
self.clipView = [[RSView alloc] initWithFrame:CGRectMake(0, 0, self.view.bounds.size.width, self.view.bounds.size.height)];
self.clipView.clipsToBounds = YES;
[self.view addSubview:self.clipView];
self.scrollView = [[UIScrollView alloc] initWithFrame:CGRectMake(0, 0, self.clipView.bounds.size.width, kScrollViewHeight)];
self.scrollView.delegate = self;
self.scrollView.clipsToBounds = NO;
self.scrollView.pagingEnabled = YES;
self.scrollView.showsHorizontalScrollIndicator = NO;
self.scrollView.showsVerticalScrollIndicator = NO;
self.scrollView.autoresizingMask = UIViewAutoresizingFlexibleWidth;
[self.view addSubview:self.scrollView];
self.clipView.scrollView = self.scrollView;
self.pageControl = [[RSCircaPageControl alloc] initWithNumberOfPages:10];
CGRect frame = self.pageControl.frame;
frame.origin.x = self.view.bounds.size.width - frame.size.width - 10;
frame.origin.y = roundf((self.view.bounds.size.height - frame.size.height) / 2.);
self.pageControl.frame = frame;
self.pageControl.autoresizingMask = UIViewAutoresizingFlexibleLeftMargin | UIViewAutoresizingFlexibleTopMargin | UIViewAutoresizingFlexibleBottomMargin;
[self.pageControl setCurrentPage:0 usingScroller:NO];
[self.view addSubview:self.pageControl];
CGFloat currentY = 0;
for (int i = 0; i < 10; i++) {
UIScrollView *sv = [[UIScrollView alloc] initWithFrame:CGRectMake(0, currentY, self.scrollView.bounds.size.width, kScrollViewHeight)];
sv.tag = kScrollViewTagBase + i;
sv.delegate = self;
sv.autoresizingMask = UIViewAutoresizingFlexibleWidth;
sv.backgroundColor = [UIColor colorWithRed:(arc4random() % 257) / 256. green:(arc4random() % 257) / 256. blue:(arc4random() % 257) / 256. alpha:1];
///here's the buttton!!
UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom];
UIImage*normal = [UIImage imageNamed:#"girl.jpg"];
UIImage*selected = [UIImage imageNamed:#"girl2.jpg"];
button.frame = CGRectMake(100, 100, 50,50));
[button setImage:normal forState:UIControlStateNormal];
[button setImage:selected forState:UIControlStateHighlighted];
button.contentMode = UIViewContentModeScaleAspectFit;
[button addTarget:self
action:#selector(myButtonPressed:)
forControlEvents:UIControlEventTouchDown];
[sv addSubview:button]; //notice that the button is added as a subview of SV
[self.scrollView addSubview:sv]; // notice that SV is a subview of the scrollView.
if (i == 2 || i == 6) {
sv.contentSize = CGSizeMake(sv.contentSize.width, kScrollViewContentHeight);
}
currentY += kScrollViewHeight;
}
self.scrollView.contentSize = CGSizeMake(self.scrollView.contentSize.width, currentY);
[self performSelector:changeButtomImages withObject:nil afterDelay:TwoMinutes];
}
- (void)changeButtonImages {
UIImage*normal2 = [UIImage imageNamed:#"boy.jpg"];
UIImage*selected2 = [UIImage imageNamed:#"boy2.jpg"];
[button setImage:normal2 forState:UIControlStateNormal];
[button setImage:selected2 forState:UIControlStateHighlighted];
}
Kyle
for setting button image in a normal state the parameter to pass forState: is UIControlStateNormal not UIControlStateHighlighted
So, in changeButtonImages you are changing the the image for the iVar "button", but you are never actually assigning anything to that button var. In your for loop in viewDidLoad, you are creating a local variable of UIButton called button. Maybe something like this?
- (void)myButtonPressed:(id)sender
{
UIButton *button = (UIButton *)sender;
UIImage*normal2 = [UIImage imageNamed:#"boy.jpg"];
UIImage*selected2 = [UIImage imageNamed:#"boy2.jpg"];
[button setImage:normal2 forState:UIControlStateNormal];
[button setImage:selected2 forState:UIControlStateHighlighted];
}
I have a button that doesn't call its target's selector.
When I click it, it does get highlighted. However, I set a break point at playButtonClicked and it never gets reached.
I'm not sure if it's being released, but I don't think so. I have ARC enabled and I can't call retain or release.
I've also tried explicitly enabling userInteractionEnabled but that doesn't make a difference either.
Here is my code:
#import "MainMenuView.h"
#implementation MainMenuView
- (void)initializeButton:(UIButton*)button withText:(NSString*)text buttonHeight: (int)buttonHeight buttonWidth:(int)buttonWidth buttonYInitialPosition:(int)buttonYInitialPosition buttonXPosition:(int)buttonXPosition
{
button = [UIButton buttonWithType:UIButtonTypeRoundedRect];
button.frame = CGRectMake(buttonXPosition, buttonYInitialPosition, buttonWidth, buttonHeight);
button.backgroundColor = [UIColor clearColor];
[button setBackgroundImage:[UIImage imageNamed:#"button.png"] forState:UIControlStateNormal];
[button setTitle:text forState:UIControlStateNormal];
[button setTitleColor:[UIColor whiteColor] forState:UIControlStateNormal];
button.titleLabel.font = [UIFont boldSystemFontOfSize:24];
[self addSubview:button];
[self bringSubviewToFront:button];
}
- (id)initWithFrame:(CGRect)frame
{
self = [super initWithFrame:frame];
if (self) {
self.backgroundColor = [UIColor yellowColor];
UIImage *backgroundImage = [UIImage imageNamed:#"title_background.jpeg"];
UIImageView *background = [[UIImageView alloc] initWithFrame:frame];
background.image = backgroundImage;
background.backgroundColor = [UIColor greenColor];
[self addSubview:background];
int centerWidth = frame.size.width / 2;
int centerHeight = frame.size.height / 9;
int centerXPos = frame.size.width / 4;
int buttonYInitialPosition = frame.size.height / 2 + frame.size.height / 20;
int buttonYOffset = frame.size.height / 7;
// init buttons
[self initializeButton:playButton withText:#"Play" buttonHeight:centerHeight buttonWidth: centerWidth
buttonYInitialPosition:buttonYInitialPosition buttonXPosition:centerXPos];
[playButton addTarget:self action:#selector(playButtonClicked:) forControlEvents:UIControlEventTouchUpInside];
}
return self;
}
- (void) playButtonClicked:(id)sender
{
NSLog(#"Play Button Clicked");
}
#end
Your code isn't doing what you think it is.
When you pass playButton in to -initializeButton:... and then immediately create a new button and assign it to that variable, you're no longer operating on the value that playButton points to. So when you call -addTarget:action:forControlState: afterwards, you're assigning a target to whatever playButton happens to point to, which is not the button you just created and added.
Passing a pointer is done (by default) by value, which means that you only have the address that the pointer held, not a reference to the pointer itself. So you can't change the pointer itself, only the object it points to. You can pass the pointer by reference, if you want to modify what it points to; or you can restructure your code so that you're always acting on the pointer directly—for instance, you could just use an ivar or property and have your initialize method set that property. Or you could return the button and assign it to your variable or property.
You are initializing the button incorrectly. A better approach is to have your initializeButton return the button.
- (UIButton *)initializeButtonWithText:(NSString*)text buttonHeight: (int)buttonHeight buttonWidth:(int)buttonWidth buttonYInitialPosition:(int)buttonYInitialPosition buttonXPosition:(int)buttonXPosition
{
UIButton *button = [UIButton buttonWithType:UIButtonTypeRoundedRect];
button.frame = CGRectMake(buttonXPosition, buttonYInitialPosition, buttonWidth, buttonHeight);
button.backgroundColor = [UIColor clearColor];
[button setBackgroundImage:[UIImage imageNamed:#"button.png"] forState:UIControlStateNormal];
[button setTitle:text forState:UIControlStateNormal];
[button setTitleColor:[UIColor whiteColor] forState:UIControlStateNormal];
button.titleLabel.font = [UIFont boldSystemFontOfSize:24];
[self addSubview:button];
[self bringSubviewToFront:button];
return button;
}
Then call it this way:
playButton = [self initializeButtonWithText:#"Play" buttonHeight:centerHeight buttonWidth: centerWidth
buttonYInitialPosition:buttonYInitialPosition buttonXPosition:centerXPos];
I think you should do your initialization stuff in the method:
-(void)awakeFromNib {}
It's like the -viewDidLoad method for custom UIViews in that all the nib objects have been loaded and ready to go.
In the first line of your initializeButton method, you create a new Button. This new button is styled and added to the view hierarchy. This is the button that you see and that you can tap when you launch your app.
However, you apparently have another button named playButton. You pass it into the initializeButton method, but as written above, don't do anything with that reference. That means the addTarget: call goes to a button that you never add to your view hierarchy.
My button is not responding to touch events, please find the code snippet as below.
I have added UIButton to UIView and set the UIView to UITableView's footerview.
Please let me know and thanks.
CGRect tblViewFrame = CGRectMake(self.view.bounds.origin.x, self.view.bounds.origin.y, self.view.bounds.size.width, 300);
self.tblViewSettings = [[[UITableView alloc]initWithFrame:tblViewFrame style:UITableViewStyleGrouped]autorelease];
self.tblViewSettings.backgroundColor = [UIColor clearColor];
self.tblViewSettings.showsVerticalScrollIndicator = FALSE;
self.tblViewSettings.delegate = self;
self.tblViewSettings.dataSource = self;
self.tblViewSettings.scrollEnabled = YES;
// Set the background color
self.view.backgroundColor = [UIColor clearColor];
UIView *buttonView = [[[UIView alloc]initWithFrame:CGRectMake(10,10, 320, 60)]autorelease];
self.signoutButton = [UIButton buttonWithType:UIButtonTypeRoundedRect];
self.signoutButton.frame = CGRectMake(10,10, 300, 40);
UIImage *image = [[UIImage imageNamed:#"btn-large1.png"] stretchableImageWithLeftCapWidth:22 topCapHeight:0];
NSString *strSignOut = NSLocalizedString(#"Sign Out", #"SignOut Button");
[self.signoutButton setTitle:strSignOut forState:UIControlStateNormal];
[self.signoutButton setTitleColor:[UIColor whiteColor] forState:UIControlStateNormal];
self.signoutButton.titleLabel.shadowOffset = CGSizeMake(0, -1);
[self.signoutButton setBackgroundImage:image forState:UIControlStateNormal];
self.signoutButton.titleLabel.font = [UIFont boldSystemFontOfSize:20.0];
[self.signoutButton addTarget:self action:#selector(signOutBtnTapped:) forControlEvents:UIControlEventTouchUpInside];
buttonView.backgroundColor = [UIColor clearColor];
[buttonView addSubview:self.signoutButton];
buttonView.userInteractionEnabled = YES;
//[self.view addSubview:buttonView];
self.tblViewSettings.tableFooterView = buttonView;
self.tblViewSettings.tableFooterView.userInteractionEnabled = YES;
[self.view addSubview:self.tblViewSettings];
-(IBAction)signOutBtnTapped:(id)sender{
}
I have looked at your code and applied it to my project. actually it works. i did not change anything from your code. i guess u must check out the frames of table view and the bottom view as everything else is working fine.
Try capturing the event for UIControlEventTouchDown instead of UIControlEventTouchUpInside in
[self.signoutButton addTarget:self action:#selector(signOutBtnTapped:) forControlEvents: UIControlEventTouchUpInside];
Everything else seems OK.
for Adding button in Footer view Section
- (UIView *)tableView:(UITableView *)tableView viewForFooterInSection:(NSInteger)section
{
UIView* customView;
customView = [[UIView alloc] initWithFrame:CGRectMake(0.0, 0.0, 320.0, 60.0)];
UIButton *Login_Btn = [UIButton buttonWithType:UIButtonTypeCustom];
[Login_Btn setImage:[UIImage imageNamed:#"btn_login.png"] forState:UIControlStateNormal];
Login_Btn.frame = kiPhoneButtonFrame;
[customView addSubview:Login_Btn];
[Login_Btn addTarget:self
action:#selector(Login_Btn_Clicked:)
forControlEvents:UIControlEventTouchUpInside];
return customView;
}
And Button Click Method
-(IBAction)Login_Btn_Clicked:(id)sender
{
// Code for button CLick which you want to do.
}
I have created UIToolbar control.which is added as setInputAccessoryView to one UITextField Control.Which works fine. the tollbar comes up with uikeyboard when tapping UITextField.Up to this no issues.
When i placed one button, when tapping on it i want to hide the keyboard and only want to display the toolbar.
This is not happening.the toolbar is getting hidden.
Please let me know , what is the problem/ reason in the code.
Thanks for your time.
- (void)viewDidLoad {
[super viewDidLoad];
//
myToolbar = [[UIToolbar alloc] init];
[myToolbar sizeToFit];
myToolbar.frame = CGRectMake(0,198, 320, 35);
myToolbar.barStyle = UIBarStyleBlackTranslucent;
[self.view addSubview:myToolbar];
UIImage *image = [UIImage imageNamed:#"orangebuttonsmall.png"];
UIButton *aButton = [UIButton buttonWithType:UIButtonTypeCustom];
aButton.frame = CGRectMake(0, 100, image.size.width, 25 );
aButton.contentVerticalAlignment = UIControlContentVerticalAlignmentCenter;
[aButton setTitle:#"Tap" forState:UIControlStateNormal];
[aButton setBackgroundImage: image forState:UIControlStateNormal];
[aButton setTitleColor:[UIColor blackColor] forState:UIControlStateNormal];
aButton.titleLabel.font = [UIFont boldSystemFontOfSize:10];
[aButton addTarget:self action:#selector(aCenterBtnClicked:) forControlEvents:UIControlEventTouchUpInside];
[self.view addSubview:aButton];
myToField = [[UITextField alloc] init];
myToField.frame = CGRectMake(0, 0, 320, 48);
myToField.textColor = [UIColor blackColor]; //text color
myToField.font = [UIFont systemFontOfSize:17.0]; //font size
myToField.placeholder = #"To:"; //place holder
myToField.backgroundColor = [UIColor whiteColor]; //background color
myToField.autocorrectionType = UITextAutocorrectionTypeNo; // no auto correction support
myToField.keyboardType = UIKeyboardTypePhonePad; // type of the keyboard
myToField.returnKeyType = UIReturnKeyDone; // type of the return key
myToField.clearButtonMode = UITextFieldViewModeWhileEditing;
[myToField setInputAccessoryView:myToolbar];
myToField.textAlignment = UITextAlignmentLeft;
[myToField setContentVerticalAlignment:UIControlContentVerticalAlignmentCenter];
myToField.rightViewMode=UITextFieldViewModeAlways;
// has a clear 'x' button to the right
myToField.delegate = self;
[myToField becomeFirstResponder];
[self.view addSubview:myToField];
}
-(void)aCenterBtnClicked:(id)sender{
[myToField resignFirstResponder];
myToolbar.frame = CGRectMake(0,198, 320, 35);
myToolbar.barStyle = UIBarStyleBlackTranslucent;
[self.view addSubview:myToolbar];
}
inputAccessoryViews are placed as a subview on the UIKeyboard, if you hide the keyboard, it will hide the inputAccessoryView. Try adding the toolbar as a subview of self.view and animate it's position up when the keyboard is displayed by subscribing to the UIKeyboardWillShow notification and pulling the animation duration from the userInfo.
You try for static toolbar i think that will be easy for you.I am not done before remove from setinputview because there is no method for remove set input view.
I am trying to add a UIButton at runtime however it is not visible. What am I doing wrong?
- (id)initWithFrame:(CGRect)frame {
if (self = [super initWithFrame:frame]) {
UIButton *btn = [[UIButton buttonWithType:UIButtonTypeRoundedRect] retain];
btn.frame = CGRectMake(0, 0, 100, 25);
btn.backgroundColor = [UIColor clearColor];
[btn setTitle:#"Play" forState:UIControlStateNormal];
[btn addTarget:self action:#selector(buttonClick:)
forControlEvents:UIControlEventTouchUpInside];
btn.center = self.center;
[self addSubview:btn];
}
return self;
}
First, make sure the initWithFrame: method is being called. If your view is in a Nib, initWithCoder: is being called instead.
Second, is the button the only subview (from your code it looks like it is, but you never know). The button could be hidden behind another subview. Call bringSubviewToFront: if you need to.
Finally, is the view itself visible? Is it big enough to show the button? Given your example, if the view is less than 100 pixels wide, the button won't show because it will get clipped by the view's bounds.
You must release btn and remove ":" in buttonClick:
UIButton *btn= [[UIButton buttonWithType:UIButtonTypeRoundedRect] retain];
btn.frame = CGRectMake(0, 0, 100, 25);
btn.backgroundColor = [UIColor clearColor];
[btn setTitle:#"Play" forState:UIControlStateNormal];
[btn addTarget:self action:#selector(buttonClick) forControlEvents:UIControlEventTouchUpInside];
[self.view addSubview:btn];
[btn release];
if it still doesn't work, try removing the : at the end of the selector name: #selector(buttonClick)
You don't need to retain the UIButton because it is retained by [self.view addSubview:btn];
First check whether your code is executing the initwithFrame method.
Because if you are loading the view from nib i.e using
NSArray *xibviews = [[NSBundle mainBundle] loadNibNamed: #"MySubview" owner: mySubview options: NULL];
MySubview *msView = [xibviews objectAtIndex: 0];
[self.view addSubview:msView];
Then the initWithFrame part will not be executing.So please check once.