iOS-封装UIPickerView

创建类WJPickerView继承与UIView

ProvinceModel是省市的model,包含属性

@property (nonatomic, strong) NSString *provinceCode;

@property (nonatomic, strong) NSString *provinceName;

@property (nonatomic, strong) NSString *cityCode;

@property (nonatomic, strong) NSString *cityName;

WJPickerView.h

#import <UIKit/UIKit.h>

#import "ProvinceModel.h"

/**

 *  回调block

 *

 *  @param currentModel 选中当前省的model

 */

typedef void(^selectProvinceInfoBlock) (ProvinceModel * currentModel);

@interface WJPickerView : UIView

/**

 *  返回选择的数据

 *

 *  @param block 回调block

 */

-(void)setSelectProvinceInfoBlock:(selectProvinceInfoBlock)block;

/**

 *  显示PickerView

 */

-(void)showPickerView;

@end

WJPickerView.m

#import "WJPickerView.h"

#define PROVINCE_CITYS @"citys"

#define PROVINCE_AND_CITYS_NAME @"name"

#define PROVINCE_AND_CITYS_CODE @"code"

#define PICKER_VIEW_ROW_HEIGHT 30.0f

#define PICKER_VIEW_COMPONENT_COUNT 2

@interface WJPickerView ()<UIPickerViewDelegate,UIPickerViewDataSource>

/**用来触发pickerView的textField*/

@property(nonatomic,strong)UITextField *inputTextField;

/**pickerView*/

@property(nonatomic,strong)UIPickerView * provincePickerView;

/**存储省市信息*/

@property(nonatomic,strong)NSMutableArray * provinceArray;

/**当前选中第一列的行数*/

@property(nonatomic,assign)NSInteger currentFirstRow;

/**当前选中第二列行数*/

@property(nonatomic,assign)NSInteger currentSecondRow;

@property(nonatomic,strong)selectProvinceInfoBlock  block;

@end

@implementation WJPickerView

-(UITextField *)inputTextField{

    if (!_inputTextField) {

        _inputTextField = [[UITextField alloc] init];

    }

    return _inputTextField;

}

-(UIPickerView *)provincePickerView{

    if (!_provincePickerView) {

        _provincePickerView = [[UIPickerView alloc] initWithFrame:CGRectMake(, , , )];

        _provincePickerView.showsSelectionIndicator = YES;

        _provincePickerView.dataSource = self;

        _provincePickerView.delegate = self;

    }

    return _provincePickerView;

}

-(instancetype)init{

    self = [super init];

    if (self) {

        /**从plist读取省市信息*/

        [self loadAllProvinceData];

        /**实例化PickerView并添加到inputView上*/

        [self addPickerViewToCurrentView];

    }

    return self;

}

#pragma mark - 从plist读取省市信息

-(void)loadAllProvinceData{

    NSString * filePath = [[NSBundle mainBundle] pathForResource:@"province" ofType:@"plist"];

    _provinceArray = [[NSMutableArray alloc] initWithContentsOfFile:filePath];

}

#pragma mark - 实例化PickerView并添加到inputView上

-(void)addPickerViewToCurrentView{

    [self addSubview:self.inputTextField];

    self.inputTextField.inputView = self.provincePickerView;

    self.inputTextField.inputView.backgroundColor = [UIColor whiteColor];

    /**往inputAccessoryView上添加ToolBar*/

    [self addToolBarItem];

}

#pragma mark - 往inputAccessoryView上添加ToolBar

-(void)addToolBarItem{

    /**textView键盘定制回收按钮*/

    UIToolbar * toolBar = [[UIToolbar alloc] initWithFrame:CGRectMake(, , , )];

    UIBarButtonItem * item0 = [[UIBarButtonItem alloc] initWithTitle:@"取消" style:UIBarButtonItemStyleDone target:self action:@selector(hiddenPickerView)];

    UIBarButtonItem * item1 = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemFlexibleSpace target:nil action:nil];

    UIBarButtonItem * item2 = [[UIBarButtonItem alloc] initWithTitle:@"完成" style:UIBarButtonItemStyleDone target:self action:@selector(tapSelectOkButton)];

    toolBar.items = @[item0,item1,item2];

    self.inputTextField.inputAccessoryView = toolBar;

}

#pragma mark - 数据回调

-(void)setSelectProvinceInfoBlock:(selectProvinceInfoBlock)block{

    if (self.block == nil) {

        if (block != nil) {

            self.block = block;

        }

    }

}

#pragma mark - 显示pickerView

-(void)showPickerView{

    [self.inputTextField becomeFirstResponder];

    [self.provincePickerView selectRow:_currentFirstRow inComponent: animated:NO];

    [self.provincePickerView selectRow:_currentSecondRow inComponent: animated:NO];

}

#pragma mark - 隐藏PickerView

-(void)hiddenPickerView{

    [self.superview endEditing:YES];

}

#pragma mark - 点击完成

-(void)tapSelectOkButton{

    [self hiddenPickerView];

    ProvinceModel * provinceModel = [[ProvinceModel alloc] init];

    if (_currentFirstRow < _provinceArray.count) {

        provinceModel.provinceName = [NSString stringWithFormat:@"%@", _provinceArray[_currentFirstRow][PROVINCE_AND_CITYS_NAME]];

        provinceModel.provinceCode = [NSString stringWithFormat:@"%@", _provinceArray[_currentFirstRow][PROVINCE_AND_CITYS_CODE]];

        NSArray * citys = _provinceArray[_currentFirstRow][PROVINCE_CITYS];

        if (_currentSecondRow < citys.count) {

            provinceModel.cityName = [NSString stringWithFormat:@"%@", citys[_currentSecondRow][PROVINCE_AND_CITYS_NAME]];

            provinceModel.cityCode = [NSString stringWithFormat:@"%@", citys[_currentSecondRow][PROVINCE_AND_CITYS_CODE]];

            if (self.block) {

                self.block(provinceModel);

            }

        }

    }

}

#pragma mark - UIPickerViewDataSource

/**列数*/

-(NSInteger)numberOfComponentsInPickerView:(UIPickerView *)pickerView{

    return PICKER_VIEW_COMPONENT_COUNT;

}

/**行数*/

-(NSInteger)pickerView:(UIPickerView *)pickerView numberOfRowsInComponent:(NSInteger)component{

    if (component ==  && _provinceArray != nil) {

        return _provinceArray.count;

    }

    if (component ==  && _provinceArray != nil) {

        NSArray * citys = _provinceArray[_currentFirstRow][PROVINCE_CITYS];

        return citys.count;

    }

    return ;

}

#pragma mark - UIPickerViewDelegate

/**行高*/

-(CGFloat)pickerView:(UIPickerView *)pickerView rowHeightForComponent:(NSInteger)component{

    return PICKER_VIEW_ROW_HEIGHT;

}

/**自定义PickerView显示的View*/

-(UIView *)pickerView:(UIPickerView *)pickerView viewForRow:(NSInteger)row forComponent:(NSInteger)component reusingView:(UIView *)view{

    UILabel *pickerLabel = [[UILabel alloc] initWithFrame:view.frame];

    pickerLabel.minimumScaleFactor = ;

    pickerLabel.adjustsFontSizeToFitWidth = YES;

    pickerLabel.textAlignment = NSTextAlignmentCenter;

    pickerLabel.font = [UIFont boldSystemFontOfSize:15.0f];

    pickerLabel.text = [self pickerView:pickerView titleForRow:row forComponent:component];

    return pickerLabel;

}

/**每行每列设置title*/

-(NSString *)pickerView:(UIPickerView *)pickerView titleForRow:(NSInteger)row forComponent:(NSInteger)component{

    if (component ==  && row < _provinceArray.count) {

        return _provinceArray[row][PROVINCE_AND_CITYS_NAME];

    }

    if (component == ) {

        NSArray *citys = _provinceArray[_currentFirstRow][PROVINCE_CITYS];

        if (row < citys.count) {

            return citys[row][PROVINCE_AND_CITYS_NAME];

        }

    }

    return @"";

}

/**选中后的回调*/

-(void)pickerView:(UIPickerView *)pickerView didSelectRow:(NSInteger)row inComponent:(NSInteger)component{

    if (component == ) {

        _currentFirstRow = row;

    }

    if (component == ) {

        _currentSecondRow = row;

    }

    [self.provincePickerView reloadAllComponents];

}

@end

巴特西

iOS-封装UIPickerView

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