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VTMagic is a page container library for iOS.
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README.md

VTMagic

VTMagic is a page container library for iOS, you can custom every page controller by different identifier if you need. It's so easy to use!(中文手册传送门

CHANGELOG(变更日志)

preview image

Communication

  • If you found a bug, and can provide steps to reliably reproduce it, open an issue.
  • If you have a feature request, open an issue.
  • If you want to contribute, submit a pull request.

Installation

CocoaPods

VTMagic is available through CocoaPods. To install it, simply add the following line to your Podfile, and then import <VTMagic/VTMagic.h>:

pod "VTMagic"

Manually

  1. Download the project and drop VTMagic folder into your project.
  2. Import file VTMagic.h.
#import "VTMagic.h"

Requirements

This library requires iOS 6.0+ and Xcode 7.0+.

Usage

To run the example project, clone the repo, and run pod install from the project directory first.

Integration

- (void)viewDidLoad {
    [super viewDidLoad];

    [self addChildViewController:self.magicController];
    [self.view addSubview:_magicController.view];

    [_magicController.magicView reloadData];
}

- (VTMagicController *)magicController {
    if (!_magicController) {
        _magicController = [[VTMagicController alloc] init];
        _magicController.magicView.navigationColor = [UIColor whiteColor];
        _magicController.magicView.sliderColor = [UIColor redColor];
        _magicController.magicView.layoutStyle = VTLayoutStyleDivide;
        _magicController.magicView.switchStyle = VTSwitchStyleDefault;
        _magicController.magicView.navigationHeight = 40.f;
        _magicController.magicView.dataSource = self;
        _magicController.magicView.delegate = self;
    }
    return _magicController;
}

or like this

#import "VTMagicController.h"

@interface ViewController : VTMagicController

@end
@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    
    self.magicView.navigationColor = [UIColor whiteColor];
    self.magicView.sliderColor = [UIColor redColor];
    self.magicView.layoutStyle = VTLayoutStyleDefault;
    self.magicView.switchStyle = VTSwitchStyleDefault;
    self.magicView.navigationHeight = 40.f;
    self.magicView.dataSource = self;
    self.magicView.delegate = self;
    
    [self.magicView reloadData];
}

Protocols

You must conform to <VTMagicViewDataSource>. <VTMagicViewDelegate> and <VTMagicReuseProtocol> are optional.

VTMagicViewDataSource

- (NSArray<NSString *> *)menuTitlesForMagicView:(VTMagicView *)magicView {
    return _menuList;
}

- (UIButton *)magicView:(VTMagicView *)magicView menuItemAtIndex:(NSUInteger)itemIndex {
    static NSString *itemIdentifier = @"itemIdentifier";
    UIButton *menuItem = [magicView dequeueReusableItemWithIdentifier:itemIdentifier];
    if (!menuItem) {
        menuItem = [UIButton buttonWithType:UIButtonTypeCustom];
        [menuItem setTitleColor:RGBCOLOR(50, 50, 50) forState:UIControlStateNormal];
        [menuItem setTitleColor:RGBCOLOR(169, 37, 37) forState:UIControlStateSelected];
        menuItem.titleLabel.font = [UIFont fontWithName:@"Helvetica" size:16.f];
    }
    return menuItem;
}

- (UIViewController *)magicView:(VTMagicView *)magicView viewControllerAtPage:(NSUInteger)pageIndex {
    if (0 == pageIndex) {
        static NSString *recomId = @"recom.identifier";
        VTRecomViewController *recomViewController = [magicView dequeueReusablePageWithIdentifier:recomId];
        if (!recomViewController) {
            recomViewController = [[VTRecomViewController alloc] init];
        }
        return recomViewController;
    }

    static NSString *gridId = @"grid.identifier";
    VTGridViewController *gridViewController = [magicView dequeueReusablePageWithIdentifier:gridId];
    if (!gridViewController) {
        gridViewController = [[VTGridViewController alloc] init];
    }
    return gridViewController;
}

VTMagicViewDelegate

- (void)magicView:(VTMagicView *)magicView viewDidAppear:(UIViewController *)viewController atPage:(NSUInteger)pageIndex {
    NSLog(@"pageIndex:%ld viewDidAppear:%@", (long)pageIndex, viewController.view);
}

- (void)magicView:(VTMagicView *)magicView viewDidDisappear:(UIViewController *)viewController atPage:(NSUInteger)pageIndex {
    NSLog(@"pageIndex:%ld viewDidDisappear:%@", (long)pageIndex, viewController.view);
}

- (void)magicView:(VTMagicView *)magicView didSelectItemAtIndex:(NSUInteger)itemIndex {
    NSLog(@"didSelectItemAtIndex:%ld", (long)itemIndex);
}

VTMagicReuseProtocol

This method will be called when page is reused, you should clear old data or reset content offset in here.

- (void)vtm_prepareForReuse {
    NSLog(@"clear old data if needed:%@", self);
}

Features

Appearance callbacks

VTMagic will automatically calls the appearance callbacks when user switches the page, maybe you should do something in here, e.g. refresh page info.

- (void)viewDidAppear:(BOOL)animated {
    [super viewDidAppear:animated];

    // do something...
}

- (void)viewWillDisappear:(BOOL)animated {
    [super viewWillDisappear:animated];
    
    // do something...
}

Get magicController

You can get the nearest magicController in any child view controller which is conforms to <VTMagicProtocol>, after you import file VTMagic.h.

NSInteger currentPage = self.magicController.currentPage;
UIViewController *viewController = self.magicController.currentViewController;

Switch to specified page

You can switch to some specified page.

[self.magicView switchToPage:3 animated:YES];
[self.magicController switchToPage:3 animated:YES];

Get specified view controller

You can get any page controller by page index, it will return nil if the page is not on the screen.

UIViewController *viewController = [self.magicView viewControllerAtPage:3];
UIViewController *viewController = [self.magicController viewControllerAtPage:3];

Author

VictorTian email: tianzhuo112@163.com

License

VTMagic is released under the MIT license. See LICENSE for details.

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