iOS自定义UIDatePicker日期选择器视图

#import <uikit/uikit.h>
 
@interface viewcontroller : uiviewcontroller
 
@end
 
 
#import "viewcontroller.h"
#import "hwdatepicker.h"
 
#define mainw [uiscreen mainscreen].bounds.size.width
#define mainh [uiscreen mainscreen].bounds.size.height
 
@interface viewcontroller ()<uitextfielddelegate, hwdatepickerdelegate>
 
@property (nonatomic, weak) hwdatepicker *datepicker;
@property (nonatomic, strong) uitextfield *datetextfield;
 
@end
 
@implementation viewcontroller
 
- (void)viewdidload {
 [super viewdidload];
 
 self.view.backgroundcolor = [uicolor blackcolor];
 
 //创建控件
 [self creatcontrol];
}
 
- (void)creatcontrol
{
 //textfield
 _datetextfield = [[uitextfield alloc] initwithframe:cgrectmake(mainw * 0.05, mainw * 0.72, mainw * 0.9, mainw * 0.12)];
 _datetextfield.background = [uiimage imagenamed:@"textfieldbj"];
 _datetextfield.textalignment = nstextalignmentright;
 _datetextfield.placeholder = @"请设置日期";
 _datetextfield.delegate = self;
 uilabel *lab2 = [[uilabel alloc] initwithframe:cgrectmake(0, 0, mainw * 0.4, mainw * 0.12)];
 lab2.textalignment = nstextalignmentleft;
 lab2.text = @" 日期";
 lab2.textcolor = [uicolor graycolor];
 _datetextfield.leftview = lab2;
 _datetextfield.leftviewmode = uitextfieldviewmodealways;
 uilabel *lab22 = [[uilabel alloc] initwithframe:cgrectmake(mainw * 0.12 - 15, 0, 15, mainw * 0.12)];
 _datetextfield.rightview = lab22;
 _datetextfield.rightviewmode = uitextfieldviewmodealways;
 [self.view addsubview:_datetextfield];
 
 //日期选择器
 hwdatepicker *datepicker = [[hwdatepicker alloc] initwithframe:cgrectmake(mainw * 0.05, mainh, mainw * 0.9, mainw * 0.5)];
 datepicker.delegate = self;
 [self.view addsubview:datepicker];
 self.datepicker = datepicker;
}
 
#pragma mark - uitextfielddelegate
- (bool)textfieldshouldbeginediting:(uitextfield *)textfield
{
 if (_datepicker.frame.origin.y != mainh && _datepicker != nil) {
  [_datepicker dismiss];
  return no;
  
 }else if (textfield == _datetextfield) {
  [_datepicker show];
  return no;
 }
 
 return yes;
}
 
#pragma mark - hwdatepickerdelegate
- (void)datepickerview:(hwdatepicker *)datepickerview didclicksurebtnwithselectdate:(nsstring *)date
{
 _datetextfield.text = date;
}
 
@end

#import <uikit/uikit.h>
 
@class hwdatepicker;
 
@protocol hwdatepickerdelegate <nsobject>
 
/**
 * hwdatepicker确定按钮点击代理事件
 *
 * @param datepickerview hwdatepicker
 * @param date   选中的日期
 */
- (void)datepickerview:(hwdatepicker *)datepickerview didclicksurebtnwithselectdate:(nsstring *)date;
 
@end
 
@interface hwdatepicker : uiview
 
@property (nonatomic, weak) id<hwdatepickerdelegate> delegate;
 
- (void)show;
- (void)dismiss;
 
@end
 
 
#import "hwdatepicker.h"
 
//获得屏幕的宽高
#define mainw [uiscreen mainscreen].bounds.size.width
#define mainh [uiscreen mainscreen].bounds.size.height
 
@interface hwdatepicker ()
 
@property (nonatomic, strong) uidatepicker *datepicker;
 
@end
 
@implementation hwdatepicker
 
- (id)initwithframe:(cgrect)frame
{
 if (self = [super initwithframe:frame]) {
  //背景框
  uiimageview *back = [[uiimageview alloc] initwithframe:cgrectmake(0, 0, self.bounds.size.width, self.bounds.size.height)];
  back.image = [uiimage imagenamed:@"datepickerbj"];
  [self addsubview:back];
  
  //日期选择器
  _datepicker = [[uidatepicker alloc] init];
  _datepicker.frame = cgrectmake(10, 10, self.frame.size.width - 20, 120);
  _datepicker.backgroundcolor = [uicolor clearcolor];
  [_datepicker setdatepickermode:uidatepickermodedate];
  nslocale *locale = [[nslocale alloc] initwithlocaleidentifier:@"zh_cn"];
  _datepicker.locale = locale;
  nsdateformatter *formatter_mindate = [[nsdateformatter alloc] init];
  [formatter_mindate setdateformat:@"yyyy-mm-dd"];
  nsdate *mindate = [formatter_mindate datefromstring:@"2008-01-01"];
  formatter_mindate = nil;
  [_datepicker setminimumdate:mindate];
  [self addsubview:_datepicker];
  
  //确定按钮
  uibutton *surebtn = [[uibutton alloc] initwithframe:cgrectmake((self.frame.size.width - mainw * 0.36) * 0.5, self.frame.size.height * 0.747, mainw * 0.36, mainw * 0.11)];
  [surebtn setimage:[uiimage imagenamed:@"surebtn"] forstate:uicontrolstatenormal];
  [surebtn addtarget:self action:@selector(surebtnonclick) forcontrolevents:uicontroleventtouchupinside];
  [self addsubview:surebtn];
 }
 
 return self;
}
 
- (void)surebtnonclick
{
 [self dismiss];
 
 if (_delegate && [_delegate respondstoselector:@selector(datepickerview:didclicksurebtnwithselectdate:)]) {
  [_delegate datepickerview:self didclicksurebtnwithselectdate:[self getdatestring]];
 }
}
 
- (nsstring *)getdatestring
{
 nsdateformatter *dateformatter = [[nsdateformatter alloc] init];
 [dateformatter setdateformat:@"yyyy-mm-dd"];
 nsstring *date = [dateformatter stringfromdate:[self.datepicker date]];
 
 return date;
}
 
- (void)show
{
 [uiview animatewithduration:0.3 animations:^{
  self.frame = cgrectmake(mainw * 0.05, mainh - mainw * 0.75, mainw * 0.9, mainw * 0.5);
 }];
}
 
- (void)dismiss
{
 [uiview animatewithduration:0.3 animations:^{
  self.frame = cgrectmake(mainw * 0.05, mainh, mainw * 0.9, mainw * 0.5);
 }];
}
 
@end