1.根据字符串设置UIDatePicker的初始日期:
UIDatePicker * dataPicker = [[UIDatePicker alloc]init];
dataPicker.datePickerMode = UIDatePickerModeDate;
dataPicker.minimumDate = [NSDate dateWithTimeIntervalSince1970:0];
dataPicker.locale = [[NSLocale alloc]initWithLocaleIdentifier:@"zh_Hans"];
dataPicker.maximumDate = [NSDate date];
NSString * str = @"1991-02-16";
NSDateFormatter * format = [[NSDateFormatter alloc]init];
[format setDateFormat:@"yyyy-MM-dd"];
NSDate * date = [format dateFromString:str];
dataPicker.date = date;
2.根据UIDatePicker选择中的日期,自定义想要在文本中显示的日期
NSDateFormatter * formate = [[NSDateFormatter alloc]init];
[formate setDateFormat:@"yyyy年-MM月-dd日"];
tx.text = [formate stringFromDate:date.date];
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