iPhone SDK – How To Add CheckBox Control | Coding Cluster - using asp.net, c#, mvc 4, iphone, php, ios, javascript, in asp.net mvc 3 & more

iPhone SDK – How To Add CheckBox Control


 iPhone SDK – Add CheckBox Control:

                                                                 This is quite a common requirement to be able to add a custom checkbox control in an iPhone app. In the Interface builder -> Tools ->library there is no CheckBox control while other controls like Label and Text Field are there. Here is how I implemented it. I would be interested in hearing about how others went about doing it.

You can use the UIButton control to make a CheckBox.

In your project, in the resources folder add the images e.g. the ones attached with in this post “checkbox_ticked.png” and “checkbox_not_ticked.png”.

 You can right click on, and save as the below images.

Define the members as follows in “ChkBoxViewController.h”

@interface CheckBoxViewController : UIViewController
 BOOL checkboxSelected
UIButton *checkBox;
UILabel *checkBoxLabel;
Uncomment the viewDidLoad in “ChkBoxViewController.m” and use the following code.
- (void)viewDidLoad
    [super viewDidLoad]
checkBox [[UIButton alloc] initWithFrame:CGRectMake(601001616)];
checkBox.contentVerticalAlignment UIControlContentVerticalAlignmentCenter;
checkBox.contentHorizontalAlignment UIControlContentHorizontalAlignmentCenter;
// Image for normal state
UIImage *newNormalImage [UIImage imageNamed:@"checkbox_not_ticked.png"];
[checkBox setBackgroundImage:newNormalImage forState:UIControlStateNormal];
// Image for highlighted state
UIImage *newHighlightedImage [UIImage imageNamed:@"checkbox_ticked.png"];
[checkBox setBackgroundImage:newHighlightedImage forState:UIControlStateHighlighted];
// Image for selected state
UIImage *newSelectedImage [UIImage imageNamed:@"checkbox_ticked.png"];
[checkBox setBackgroundImage:newSelectedImage forState:UIControlStateSelected];
[checkBox addTarget:self action:@selector(checkBoxSelect:)forControlEvents:UIControlEventTouchUpInside];
checkBox.adjustsImageWhenHighlighted YES;
[checkBox setBackgroundColor:[UIColor clearColor]];
[[self view] addSubview:checkBox];
checkBoxLabel [[UILabel alloc] initWithFrame:CGRectMake(1009020040)];
[checkBoxLabel setText:@"Check Box"];
[checkBox setBackgroundColor:[[ self view] backgroundColor]];
[[self view] addSubview:checkBoxLabel];
And add the following action method
if (checkboxSelected == 0)
        [checkBox setSelected:YES]
[checkBoxLabel setText:@"Check Box - Selected"];
checkboxSelected 1;
        [checkBox setSelected:NO]
[checkBoxLabel setText:@"Check Box"];
checkboxSelected 0;
Build and Run the application, this will work as checkbox control.


Post a Comment

Share your thoughts here...




Blogger Widgets