//
// ViewController.m// 04-键盘处理////#import "ViewController.h"#import "XMGProvince.h"@interface ViewController ()<UITextFieldDelegate,UIPickerViewDataSource,UIPickerViewDelegate>@property (weak, nonatomic) IBOutlet UITextField *birthdayField;@property (nonatomic, weak) UIDatePicker *datePicker;@property (nonatomic, weak) UIPickerView *pickerView;@property (weak, nonatomic) IBOutlet UITextField *cityField;@property (nonatomic, strong) NSMutableArray *provinces;@property (nonatomic, assign) NSInteger proIndex;@end@implementation ViewController// 懒加载省会- (NSMutableArray *)provinces{ if (_provinces == nil) { // 装所有的省会 _provinces = [NSMutableArray array]; // 加载plist文件 NSString *filePath = [[NSBundle mainBundle] pathForResource:@"provinces.plist" ofType:nil]; NSArray *arr = [NSArray arrayWithContentsOfFile:filePath]; for (NSDictionary *dict in arr) { // 字典转模型 XMGProvince *p = [XMGProvince provinceWithDict:dict]; [_provinces addObject:p]; } } return _provinces;}#pragma mark - UITextFieldDelegate// 是否允许用户输入文字- (BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string{ return NO;}// 文本框开始编辑的时候调用- (void)textFieldDidBeginEditing:(UITextField *)textField{ if (textField == _birthdayField) { // 给生日文本框赋值 [self dateChange:_datePicker]; }else{ // 给城市文本框赋值 [self pickerView:_pickerView didSelectRow:0 inComponent:0]; }}#pragma mark -viewDidLoad- (void)viewDidLoad { [super viewDidLoad]; // Do any additional setup after loading the view, typically from a nib. // 设置文本框的代码 _birthdayField.delegate = self; _cityField.delegate = self; // 自定义生日键盘 [self setUpBirthdayKeyboard]; // 自定义城市键盘 [self setUpCityKeyboard]; }#pragma mark - 自定义城市键盘- (void)setUpCityKeyboard{ UIPickerView *pickerView = [[UIPickerView alloc] init]; _pickerView = pickerView; pickerView.dataSource = self; pickerView.delegate = self; _cityField.inputView = pickerView;}#pragma mark -UIPickerView#pragma mark UIPickerView的数据源- (NSInteger)numberOfComponentsInPickerView:(UIPickerView *)pickerView{ return 2;}// pickerView的第0列描述省会，有多少个省// pickerView的第1列描述选中的省会，有多少个城市- (NSInteger)pickerView:(UIPickerView *)pickerView numberOfRowsInComponent:(NSInteger)component{ if (component == 0) { // 描述省会 return self.provinces.count; }else{ // 描述选中的省会的城市 // 获取省会 XMGProvince *p = self.provinces[_proIndex]; return p.cities.count; }}#pragma mark -UIPickerView的代理- (NSString *)pickerView:(UIPickerView *)pickerView titleForRow:(NSInteger)row forComponent:(NSInteger)component{ if (component == 0) { // 描述省会 // 获取省会 XMGProvince *p = self.provinces[row]; return p.name; }else{ // 描述选中的省会的城市 // 获取选中的省会的角标 NSInteger index = [pickerView selectedRowInComponent:0]; // 获取选中省会 XMGProvince *p = self.provinces[_proIndex]; // 当前选中的内蒙古省，只有12个城市，角标0~11，但是右边城市是北京，北京的城市大于12个城市，所以滚动的时候会出现越界。 NSLog(@"province:%@, count:%ld row:%ld",p.name,p.cities.count,row); #warning TODO: return p.cities[row]; }}// 全局断点就是帮我们定位到出bug的那一行。// 滚动UIPickerView就会调用- (void)pickerView:(UIPickerView *)pickerView didSelectRow:(NSInteger)row inComponent:(NSInteger)component{ if (component == 0) { // 滚动省会,刷新城市（1列） // 记录当前选中的省会 _proIndex = [pickerView selectedRowInComponent:0]; [pickerView reloadComponent:1]; } // 给城市文本框赋值 // 获取选中省会 XMGProvince *p = self.provinces[_proIndex]; // 获取选中的城市 NSInteger cityIndex = [pickerView selectedRowInComponent:1]; NSString *cityName = p.cities[cityIndex]; _cityField.text = [NSString stringWithFormat:@"%@ %@",p.name,cityName];}#pragma mark -自定义生日键盘- (void)setUpBirthdayKeyboard{ // 创建UIDatePicker // 注意：UIDatePicker有默认的尺寸，可以不用设置frame UIDatePicker *picker = [[UIDatePicker alloc] init]; _datePicker = picker; // 设置地区 zh:中国 picker.locale = [NSLocale localeWithLocaleIdentifier:@"zh"]; // 设置日期的模式 picker.datePickerMode = UIDatePickerModeDate; // 监听UIDatePicker的滚动 [picker addTarget:self action:@selector(dateChange:) forControlEvents:UIControlEventValueChanged]; _birthdayField.inputView = picker;}// 当UIDatePicker滚动的时候调用// 给生日文本框赋值- (void)dateChange:(UIDatePicker *)datePicker{ NSLog(@"%@",datePicker.date); // 日期转换字符串 NSDateFormatter *fmt = [[NSDateFormatter alloc] init]; fmt.dateFormat = @"yyyy-MM-dd"; NSString *dateStr = [fmt stringFromDate:datePicker.date]; _birthdayField.text = dateStr;}- (void)didReceiveMemoryWarning { [super didReceiveMemoryWarning]; // Dispose of any resources that can be recreated.}@end