City selector,

City selector,

Effect

 

Source code

Https://github.com/YouXianMing/Animations

/// CustomCityPickerViewController. m // Animations /// Created by YouXianMing on. // Copyright 2017 YouXianMing. all rights reserved. // # import "mcmcitypickerviewcontroller. h "# import" PickerCityDataManager. h "# import" FileManager. h "# import" NSData + JSONData. h "# import" CustomPickerView. h "# import" PickerViewDataAdapter. h "# import" UIView + SetRect. h "# import" PickerProvinceView. h "# import" PickerCityView. h "# import" PickerAreaView. h "@ interface mcmcitypickerviewcontroller () <CustomPickerViewDelegate> @ property (nonatomic, strong) NSArray <PickerProvinceModel *> * provinces; @ property (nonatomic, strong) CustomPickerView * pickerView; @ property (nonatomic, strong) PickerViewDataAdapter * pickerViewDataAdapter; @ end @ implementation CustomCityPickerViewController-(void) viewDidLoad {[super viewDidLoad]; // Get data. NSData * data = [NSData dataWithContentsOfFile: [FileManager bundleFileWithName: @ "city. json "]; NSArray * provinces = [data toListProperty]; self. provinces = [PickerCityDataManager provinceModelsWithArray: provinces]; // Create CustomPickerView's dataAdapter. self. pickerViewDataAdapter = [PickerViewDataAdapter pickerViewDataAdapterWithComponentsBlock: ^ (NSMutableArray <PickerViewComponent *> * components) {// Province component. pickerViewComponent * provinceComponent = [PickerViewComponent pickerViewComponentWithRowsBlock: ^ (NSMutableArray <PickerViewRow *> * rows) {[self. provinces Summary: ^ (PickerProvinceModel * provinceModel, NSUInteger idx, BOOL * _ Nonnull stop) {[rows addObject: [PickerViewRow pickerViewRowWithViewClass: [PickerProvinceView class] data: provinceModel];} componentWidth: Width/3.f-5.f]; // City component. pickerViewComponent * cityComponent = [PickerViewComponent pickerViewComponentWithRowsBlock: ^ (NSMutableArray <PickerViewRow *> * rows) {[self. provinces. firstObject. cities attributes: ^ (PickerCityModel * cityModel, NSUInteger idx, BOOL * _ Nonnull stop) {[rows addObject: [PickerViewRow pickerViewRowWithViewClass: [PickerCityView class] data: cityModel] ;}] ;}componentwidth: Width/3.f-5.f]; // Area component. pickerViewComponent * areaComponent = [PickerViewComponent pickerViewComponentWithRowsBlock: ^ (NSMutableArray <PickerViewRow *> * rows) {[self. provinces. firstObject. cities. firstObject. areas parameters: ^ (PickerAreaModel * areaModel, NSUInteger idx, BOOL * _ Nonnull stop) {[rows addObject: [PickerViewRow pickerViewRowWithViewClass: [PickerAreaView class] data: areaModel] ;};}componentwidth: Width/3.f-5.f]; [components addObject: provinceComponent]; [components addObject: cityComponent]; [components addObject: areaComponent];} rowHeight: 60.f]; // Create CustomPickerView. self. pickerView = [[CustomPickerView alloc] initWithFrame: CGRectMake (0, 0, Width, 0) delegate: self pickerViewHeightType: kCustomPickerViewHeightTypeMax dataAdapter: self. pickerViewDataAdapter]; self. pickerView. center = self. contentView. middlePoint; [self. contentView addSubview: self. pickerView] ;}# pragma mark-CustomPickerViewDelegate-(void) customPickerView :( CustomPickerView *) pickerView didSelectRow :( NSInteger) row inComponent :( NSInteger) component {if (component = 0) {NSMutableArray * citys = [NSMutableArray array]; [self. provinces [row]. cities attributes: ^ (PickerCityModel * cityModel, NSUInteger idx, BOOL * _ Nonnull stop) {[citys addObject: [PickerViewRow attributes: [PickerCityView class] data: cityModel];}]; NSMutableArray * areas = [NSMutableArray array]; [self. provinces [row]. cities. firstObject. areas metadata: ^ (PickerAreaModel * areaModel, NSUInteger idx, BOOL * _ Nonnull stop) {[areas addObject: [PickerViewRow metadata: [PickerAreaView class] data: areaModel];}]; pickerView. pickerViewDataAdapter. components [1]. rows = citys; pickerView. pickerViewDataAdapter. components [2]. rows = areas; [pickerView reloadComponent: 1]; [pickerView reloadComponent: 2]; [pickerView selectRow: 0 inComponent: 1 animated: YES]; [pickerView selectRow: 0 inComponent: 2 animated: YES];} else if (component = 1) {NSInteger provinceIndex = [self. pickerView selectedRowInComponent: 0]; NSMutableArray * areas = [NSMutableArray array]; // Protect crash. if (self. provinces [provinceIndex]. cities. count <= row) {row = self. provinces [provinceIndex]. cities. count-1;} [self. provinces [provinceIndex]. cities [row]. areas metadata: ^ (PickerAreaModel * areaModel, NSUInteger idx, BOOL * _ Nonnull stop) {[areas addObject: [PickerViewRow metadata: [PickerAreaView class] data: areaModel];}]; pickerView. pickerViewDataAdapter. components [2]. rows = areas; [pickerView reloadComponent: 2]; [pickerView selectRow: 0 inComponent: 2 animated: YES]; }}- (void) customPickerView :( CustomPickerView *) pickerView didSelectedRows :( NSArray <NSNumber *> *) rows selectedDatas :( NSArray <id> *) datas {NSLog (@ "% @", datas);} @ end

 

Features

1. Each row can be customized like a cell using UITableView. inherit CustomPickerView.

2. The data source is specified through the PickerViewDataAdapter. Each PickerViewComponent has an array of PickViewRow.Each PickViewRow element corresponds to a customCustomPickerView.