iOS 自定义日期选择器

前言

封装了一个日期选择器，解决两个问题：
1、点击textField，键盘弹出和日期选择器弹出的逻辑处理；
2、同一个界面需要多次用到日期选择器时，判断点击的textField;

一、封装日期选择器类YCDatePickerView

1、新建一个类，基于UIView，取名YCDatePickerView。

2、YCDatePickerView类中.h文件代码如下：

typedef void (^MyBasicBlock)(id result);

#import 

@interface YCDatePickerView : UIView

@property (nonatomic, strong) UIButton *btnConfirm;
@property (nonatomic, strong) UIButton *btnCancel;
@property (nonatomic, strong) UIDatePicker *datePicker;
@property (nonatomic, copy) MyBasicBlock selectBlock;

+ (YCDatePickerView *)datePickerViewWithMode:(UIDatePickerMode) datePickerMode bolck:(MyBasicBlock)block;


@end

3、YCDatePickerView类中.m文件代码如下：

#define SCREEN_WIDTH      [[UIScreen mainScreen] bounds].size.width
#define SCREEN_HEIGHT     [[UIScreen mainScreen] bounds].size.height

#define kTopBarViewHeight       40
#define kButton_Width           40
#define kButton_Height          40
#define kDatePicker_Height      256


#import "YCDatePickerView.h"

@implementation YCDatePickerView

- (id)initWithFrame:(CGRect)frame
{
    self = [super initWithFrame:frame];
    if (self) {

        UIView *topBarView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, self.frame.size.width, kTopBarViewHeight)];
        topBarView.backgroundColor = [UIColor orangeColor];
        [self addSubview:topBarView];

        _btnConfirm = [[UIButton alloc] initWithFrame:CGRectMake(self.frame.size.width-kButton_Width-10, 0, kButton_Width, kButton_Height)];
        [_btnConfirm addTarget:self action:@selector(btnConfirm:) forControlEvents:UIControlEventTouchUpInside];
        [_btnConfirm setTitle:@"确定" forState:UIControlStateNormal];
        [topBarView addSubview:_btnConfirm];

        _btnCancel = [[UIButton alloc] initWithFrame:CGRectMake(10, 0, kButton_Width, kButton_Height)];
        [_btnCancel addTarget:self action:@selector(btnCancel:) forControlEvents:UIControlEventTouchUpInside];
        [_btnCancel setTitle:@"取消" forState:UIControlStateNormal];
        [topBarView addSubview:_btnCancel];

        _datePicker = [[UIDatePicker alloc] initWithFrame:CGRectMake(0, CGRectGetMaxY(topBarView.frame), self.frame.size.width, self.frame.size.height-kTopBarViewHeight)];
        _datePicker.backgroundColor = [UIColor whiteColor];
        [self addSubview:_datePicker];

    }
    return self;
}

- (void)btnConfirm:(id)sender
{
    if (self.selectBlock) {
        self.selectBlock(self.datePicker.date);
    }
}

- (void)btnCancel:(id)sender
{
    if (self.selectBlock) {
        self.selectBlock(nil);
    }
}

+ (YCDatePickerView *)datePickerViewWithMode:(UIDatePickerMode) datePickerMode bolck:(MyBasicBlock)block
{
    YCDatePickerView *picker = [[YCDatePickerView alloc] initWithFrame:CGRectMake(0, 0, SCREEN_WIDTH, kDatePicker_Height)];
    picker.datePicker.datePickerMode = datePickerMode;
    picker.selectBlock = block;
    return picker;
}

@end

二、YCDatePickerView的使用

1、在ViewController中导入头文件

#import "YCDatePickerView.h"

2、在ViewController.m中添加如下代码

#define SCREEN_WIDTH      [[UIScreen mainScreen] bounds].size.width
#define SCREEN_HEIGHT     [[UIScreen mainScreen] bounds].size.height


#import "ViewController.h"
#import "YCDatePickerView.h"

@interface ViewController ()

@property (retain, nonatomic) YCDatePickerView *datePicker;

@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];


    UITextField *begin = [[UITextField alloc] initWithFrame:CGRectMake(10, 70, SCREEN_WIDTH-20, 30)];
    begin.placeholder = @"请输入开始时间";
    begin.borderStyle = UITextBorderStyleRoundedRect;
    [self.view addSubview:begin];

    __weak ViewController *weakself = self;
    begin.inputView = [YCDatePickerView datePickerViewWithMode:UIDatePickerModeDate
                                                         bolck:^(NSDate *result) {
                                                             if (result) {
                                                                 begin.text = [weakself dateToString:result];
                                                             }
                                                             [begin resignFirstResponder];
                                                         }];


    UITextField *end = [[UITextField alloc] initWithFrame:CGRectMake(10, 120, SCREEN_WIDTH-20, 30)];
    end.placeholder = @"请输入结束时间";
    end.borderStyle = UITextBorderStyleRoundedRect;
    [self.view addSubview:end];

    end.inputView = [YCDatePickerView datePickerViewWithMode:UIDatePickerModeDate
                                                                      bolck:^(NSDate *result) {
                                                                          if (result) {
                                                                              end.text = [weakself dateToString:result];
                                                                          }
                                                                          [end resignFirstResponder];
                                                                      }];

}

//日期转为字符串
- (NSString *)dateToString:(NSDate *)date
{
    NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
    [dateFormatter setDateFormat:@"yyyy-MM-dd HH:mm:ss"];
    NSString *strDate = [dateFormatter stringFromDate:date];
    return strDate;
}

@end

三、效果图