iOS如何自定义UIDatePicker日期选择器视图

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代码：

ViewController：

#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

HWDatePicker：

#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

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