ICViewPager

NOTE: This fork is intended for fixing the iOS8 top gap problem.

You can create sliding tabs with ViewPager.

Slide through the contents or select from tabs or slide through tabs and select!

Installation

Just copy ViewPagerController.m and ViewPagerController.h files to your project.

Or you can use CocoaPods (as this is the recommended way).

pod 'ICViewPager'

Usage

Subclass ViewPagerController (as it's a UIViewController subclass) and implement dataSource and delegate methods in the subclass.

In the subclass assign self as dataSource and delegate,

- (void)viewDidLoad {
    
    [super viewDidLoad];
    
    self.dataSource = self;
    self.delegate = self;
}

Methods

Then implement dataSource and delegate methods.

#pragma mark - ViewPagerDataSource
- (NSUInteger)numberOfTabsForViewPager:(ViewPagerController *)viewPager {
    return 10;
}

Returns the number of tabs that will be present in ViewPager.

#pragma mark - ViewPagerDataSource
- (UIView *)viewPager:(ViewPagerController *)viewPager viewForTabAtIndex:(NSUInteger)index {

    UILabel *label = [UILabel new];
    label.text = [NSString stringWithFormat:@"Tab #%i", index];
    [label sizeToFit];
    
    return label;
}

Returns the view that will be shown as tab. Create a UIView object (or any UIView subclass object) and give it to ViewPager and it will use it as tab view.

#pragma mark - ViewPagerDataSource
- (UIViewController *)viewPager:(ViewPagerController *)viewPager contentViewControllerForTabAtIndex:(NSUInteger)index {
    
    ContentViewController *cvc = [self.storyboard instantiateViewControllerWithIdentifier:@"contentViewController"];
    
    return cvc;
}

Returns the view controller that will be shown as content. Create a UIViewController object (or any UIViewController subclass object) and give it to ViewPager and it will use the view property of the view controller as content view.

Alternatively, you can implement - viewPager:contentViewForTabAtIndex: method and return a UIView object (or any UIView subclass object) and ViewPager will use it as content view.

The - viewPager:contentViewControllerForTabAtIndex: and - viewPager:contentViewForTabAtIndex: dataSource methods are both defined optional. But, you should implement at least one of them! They are defined as optional to provide you an option.

All delegate methods are optional.

#pragma mark - ViewPagerDelegate
- (void)viewPager:(ViewPagerController *)viewPager didChangeTabToIndex:(NSUInteger)index {
    
    // Do something useful
}

ViewPager will alert your delegate object via - viewPager:didChangeTabToIndex: method, so that you can do something useful.

#pragma mark - ViewPagerDelegate
- (CGFloat)viewPager:(ViewPagerController *)viewPager valueForOption:(ViewPagerOption)option withDefault:(CGFloat)value {
    
    switch (option) {
        case ViewPagerOptionStartFromSecondTab:
            return 0.0;
        case ViewPagerOptionCenterCurrentTab:
            return 0.0;
        case ViewPagerOptionTabLocation:
            return 0.0;
        default:
            return value;
    }
}

You can change ViewPager's options via viewPager:valueForOption:withDefault: delegate method. Just return the desired value for the given option. You don't have to return a value for every option. Only return values for the interested options and ViewPager will use the default values for the rest. Available options are defined in the ViewPagerController.h file and described below.

#pragma mark - ViewPagerDelegate
- (UIColor *)viewPager:(ViewPagerController *)viewPager colorForComponent:(ViewPagerComponent)component withDefault:(UIColor *)color {
    
    switch (component) {
        case ViewPagerIndicator:
            return [[UIColor redColor] colorWithAlphaComponent:0.64];
        default:
            return color;
    }
}

You can change some colors too. Just like options, return the interested component's color, and leave out all the rest! Link

Options

Every option has a default value. So

• ViewPagerOptionTabHeight: Tab bar's height, defaults to 44.0
• ViewPagerOptionTabOffset: Tab bar's offset from left, defaults to 56.0
• ViewPagerOptionTabWidth: Any tab item's width, defaults to 128.0
• ViewPagerOptionTabLocation: 1.0: Top, 0.0: Bottom, Defaults to Top
• ViewPagerOptionStartFromSecondTab: 1.0: YES, 0.0: NO, defines if view should appear with the 1st or 2nd tab. Defaults to NO
• ViewPagerOptionCenterCurrentTab: 1.0: YES, 0.0: NO, defines if tabs should be centered, with the given tabWidth. Defaults to NO
• ViewPagerOptionFixFormerTabsPositions: 1.0: YES, 0.0: NO, defines if the active tab should be placed margined by the offset amount to the left. Effects only the former tabs. If set 1.0 (YES), first tab will be placed at the same position with the second one, leaving space before itself. Defaults to NO
• ViewPagerOptionFixLatterTabsPositions: 1.0: YES, 0.0: NO, like ViewPagerOptionFixFormerTabsPositions, but effects the latter tabs, making them leave space after themselves. Defaults to NO

Components

Main parts of the ViewPagerController

• ViewPagerIndicator: The colored line in the view of the active tab.
• ViewPagerTabsView: The tabs view itself. When used in - viewPager:colorForComponent:withDefault: method, the returned color will be used as background color for the tab view.
• ViewPagerContent: Provided views goes here as content. When used in - viewPager:colorForComponent:withDefault: method, the returned color will be used as background color for the content view.

Requirements

ViewPager supports minimum iOS 6 and uses ARC.

Supports both iPhone and iPad.

Contact

@iltercengiz

Ilter Cengiz

Note (to everyone who is interested in ViewPager): I cannot have much time to improve ViewPager for a long time, but I have some cool plans for it. So if you encounter any problems, bugs or etc. please forgive me, and send some pull requests. Thank you for your interest and support.

Licence

ICViewPager is MIT licensed. See the LICENCE file for more info.