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// 1.日期Picker
UIDatePicker *datePicker = [[UIDatePicker alloc] initWithFrame:CGRectMake(0, 30, self.frame.size.width, self.frame.size.height - 30)];
datePicker.backgroundColor = [UIColor whiteColor];
// 1.1选择datePickr的显示风格
[datePicker setDatePickerMode:UIDatePickerModeDate];
// 1.2查询所有可用的地区
//NSLog(@"%@", [NSLocale availableLocaleIdentifiers]);
// 1.3设置datePickr的地区语言, zh_Han后面是s的就为简体中文,zh_Han后面是t的就为繁体中文, zh_Hans_CN 简体中文 zh_Hant_CN 繁体中文 en_US 英文
[datePicker setLocale:[[NSLocale alloc] initWithLocaleIdentifier:@"zh_Hans_CN"]];
// 1.4监听datePickr的数值变化
[datePicker addTarget:self action:@selector(dateChanged:) forControlEvents:UIControlEventValueChanged];
// 1.5 设置默认时间
[datePicker setDate:[NSDate date]];
[self addSubview:datePicker];
// 监听
- (void)dateChanged:(UIDatePicker *)picker{
NSDateFormatter * formatter = [[NSDateFormatter alloc] init];
[formatter setDateFormat:@"yyyy年MM月dd日"];
NSString *dateStr = [formatter stringFromDate:picker.date];
}