更改日期选择器的日期格式

Question

我想更改附加图像的格式

从YYYY / MM / DD到dd / MMM hh：min a但不幸的是我不能那样做

这是我在视图控制器3中的工作

#import "ViewController3.h"

@interface ViewController3 ()

@end

@implementation ViewController3

@synthesize text;

- (void)viewDidLoad {
    [super viewDidLoad];

    datePicker=[[UIDatePicker alloc]init];
    datePicker.datePickerMode=UIDatePickerModeDate;
    [self.text setInputView:datePicker];
    UIToolbar *toolBar=[[UIToolbar alloc]initWithFrame:CGRectMake(0, 0, 320, 44)];
    [toolBar setTintColor:[UIColor grayColor]];
    UIBarButtonItem *doneBtn=[[UIBarButtonItem alloc]initWithTitle:@"Done" style:UIBarButtonItemStyleBordered target:self action:@selector(ShowSelectedDate)];
    UIBarButtonItem *space=[[UIBarButtonItem alloc]initWithBarButtonSystemItem:UIBarButtonSystemItemFlexibleSpace target:nil action:nil];
    [toolBar setItems:[NSArray arrayWithObjects:space,doneBtn, nil]];
    [self.text setInputAccessoryView:toolBar];

}

-(void)ShowSelectedDate
{   NSDateFormatter *formatter=[[NSDateFormatter alloc]init];
    [formatter setDateFormat:@"dd/MMM hh:min a"];
    self.text.text=[NSString stringWithFormat:@"%@",[formatter stringFromDate:datePicker.date]];
    [self.text resignFirstResponder];
}
    @end

你还有其他想法吗？

Answer 1

您希望以原始日期格式设置日期格式化程序，然后将结果转换为新的日期格式。

NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
[dateFormatter setDateFormat:@"YYYY/MM/DD"];
NSString *originalDateString = [dateFormatter stringFromDate:datePicker.date];
[dateFormatter setDateFormat:@"dd/MMM hh:mm a"];
NSDate *newDate = [dateFormatter dateFromString:origianalDateString];
self.text.text = [NSString stringWithFormat:@"%@", [dateFormatter stringFromDate:newDate]];