<pre name="code" class="objc">- (void)viewDidLoad { [super viewDidLoad]; // Do any additional setup after loading the view, typically from a nib. self.view.backgroundColor = [UIColor whiteColor];  if (!_picker || _picker == nil) {  _picker = [[DatePicker alloc] initWithFrame:CGRectMake(0, 120, 375, 667)];  _picker.backgroundColor = [UIColor whiteColor];  _picker.delegate = self;  [self.view addSubview:_picker];  _picker.hidden = YES; } [self creatCustomButton]; }- (void)creatCustomButton{ UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom]; button.frame = CGRectMake(120, 20, 100, 40); [button setTitle:@"日期選擇器" forState:UIControlStateNormal]; [button setTitleColor:[UIColor redColor] forState:UIControlStateNormal]; [button addTarget:self action:@selector(buttonAction:) forControlEvents:UIControlEventTouchUpInside ]; [self.view addSubview:button];}- (void)buttonAction:(UIButton *)sender{ if (!_picker || _picker == nil) {  _picker = [[DatePicker alloc] initWithFrame:CGRectMake(0, 120, 375, 667)];  _picker.backgroundColor = [UIColor whiteColor];  _picker.delegate = self;  [self.view addSubview:_picker]; }else{  _picker.hidden = NO; } }-(void)DatePickerDelegateEnterActionWithDataPicker:(DatePicker *)picker{ NSLog(@"======>%@",picker.date); NSString *dateStr = [NSString stringWithFormat:@"%@",picker.date]; [_picker removeFromSuperview]; _picker = nil; [[[UIAlertView alloc]initWithTitle:@"提示" message:dateStr delegate:self cancelButtonTitle:nil otherButtonTitles:@"確定", nil] show];  }- (void)didReceiveMemoryWarning { [super didReceiveMemoryWarning]; // Dispose of any resources that can be recreated.}@end</pre><br><pre></pre><br>DatePicker.h<br><p><span style="font-size:14px"></span></p><pre code_snippet_id="2093925" snippet_file_name="blog_20170103_2_3524896" name="code" class="objc">#import <UIKit/UIKit.h>@protocol DatePickerDelegate;@interface DatePicker : UIView <UIPickerViewDataSource,UIPickerViewDelegate>// 按照規范, 請把這些設置為外部不可見的// 不可見的部分, 請放到.m文件里@property (nonatomic, retain) UIPickerView* yearPicker;  // 年@property (nonatomic, retain) UIPickerView* monthPicker; // 月@property (nonatomic, retain) UIPickerView* dayPicker;  // 日@property (nonatomic, retain) UIPickerView* hourPicker;  // 時@property (nonatomic, retain) UIPickerView* minutePicker; // 分// 對外可見的@property (nonatomic, retain) NSDate* date;  // 當前date// 不可見的@property (nonatomic, retain) UIToolbar* toolBar;  // 工具條@property (nonatomic, retain) UILabel*  hintsLabel;  // 提示信息// 不可見的@property (nonatomic, retain) NSMutableArray* yearArray;@property (nonatomic, retain) NSMutableArray* monthArray;@property (nonatomic, retain) NSMutableArray* dayArray;@property (nonatomic, retain) NSMutableArray* hourArray;@property (nonatomic, retain) NSMutableArray* minuteArray;// 不可見的@property (nonatomic, assign) NSUInteger yearValue;@property (nonatomic, assign) NSUInteger monthValue;@property (nonatomic, assign) NSUInteger dayValue;@property (nonatomic, assign) NSUInteger hourValue;@property (nonatomic, assign) NSUInteger minuteValue;@property (nonatomic, copy) NSString *dateString;/** * 設置默認值為當前時間 */-(void)resetDateToCurrentDate;/** * 設置提示信息 */-(void)setHintsText:(NSString*)hints;/** * 點擊確定按鈕 // 按照習慣,這個可木有 */-(IBAction)actionEnter:(id)sender;@property (nonatomic, assign) id<DatePickerDelegate>delegate;@end@protocol DatePickerDelegate <NSObject>/** * 點擊確定后的事件 */@optional-(void)DatePickerDelegateEnterActionWithDataPicker:(DatePicker*)picker;@end</pre><br><p></p><p class="p1">Datepicker.m<span class="s1"></span></p><p class="p1"></p><pre code_snippet_id="2093925" snippet_file_name="blog_20170103_3_4070113" name="code" class="objc"><pre code_snippet_id="2093925" snippet_file_name="blog_20170103_3_4070113" name="code" class="objc">#import "DatePicker.h"#import "NSDate+Calendar.h"#define MainHeight [UIScreen mainScreen].bounds.size.height#define MainWidth [UIScreen mainScreen].bounds.size.widthtypedef enum { ePickerViewTagYear = 2012, ePickerViewTagMonth, ePickerViewTagDay, ePickerViewTagHour, ePickerViewTagMinute}PickViewTag;@interface DatePicker (private)/** * 創建數據源 */-(void)createDataSource;/** * create month Arrays */-(void)createMonthArrayWithYear:(NSInteger)yearInt month:(NSInteger)monthInt;@end@implementation DatePicker@synthesize delegate;@synthesize yearPicker, monthPicker, dayPicker, hourPicker, minutePicker;@synthesize date;@synthesize yearArray, monthArray, dayArray, hourArray, minuteArray;@synthesize toolBar, hintsLabel;@synthesize yearValue, monthValue;@synthesize dayValue, hourValue, minuteValue;#pragma mark -#pragma mark -- (id)initWithFrame:(CGRect)frame{ self = [super initWithFrame:CGRectMake(0, MainHeight - 260, MainWidth, 260)]; if (self) {  // Initialization code  [self setBackgroundColor:[UIColor blackColor]];  NSMutableArray* tempArray1 = [[NSMutableArray alloc] initWithCapacity:0];  NSMutableArray* tempArray2 = [[NSMutableArray alloc] initWithCapacity:0];  NSMutableArray* tempArray3 = [[NSMutableArray alloc] initWithCapacity:0];  NSMutableArray* tempArray4 = [[NSMutableArray alloc] initWithCapacity:0];  NSMutableArray* tempArray5 = [[NSMutableArray alloc] initWithCapacity:0];    [self setYearArray:tempArray1];  [self setMonthArray:tempArray2];  [self setDayArray:tempArray3];  [self setHourArray:tempArray4];  [self setMinuteArray:tempArray5];    // 更新數據源  [self createDataSource];    CGFloat pRate = MainWidth/320;    // 創建 toolBar & hintsLabel & enter button  UIToolbar* tempToolBar = [[UIToolbar alloc] initWithFrame:CGRectMake(0, 0, MainWidth, 44)];  [self setToolBar:tempToolBar];  [self addSubview:self.toolBar];  //  [toolBar setTintColor:[UIColor lightTextColor]];    UILabel* tempHintsLabel = [[UILabel alloc] initWithFrame:CGRectMake(5, 5, 250, 34)];  [self setHintsLabel:tempHintsLabel];  [self.hintsLabel setBackgroundColor:[UIColor clearColor]];  [self addSubview:self.hintsLabel];  [self.hintsLabel setFont:[UIFont systemFontOfSize:24.0f]];  [self.hintsLabel setTextColor:[UIColor whiteColor]];      UIButton* tempBtn = [UIButton buttonWithType:UIButtonTypeCustom];//  [tempBtn setBackgroundImage:[UIImage imageNamed:@"Resourse.bundle/btnNormal.png"] forState:UIControlStateNormal];//  [tempBtn setBackgroundImage:[UIImage imageNamed:@"Resourse.bundle/btnPressed.png"] forState:UIControlStateNormal];  [tempBtn setTitle:@"確定" forState:UIControlStateNormal];  [tempBtn sizeToFit];  [tempBtn setTitleColor:[UIColor darkTextColor] forState:UIControlStateNormal];  [tempBtn setCenter:CGPointMake(MainWidth-15-tempBtn.frame.size.width*.5, 22)];  [tempBtn addTarget:self action:@selector(actionEnter:) forControlEvents:UIControlEventTouchUpInside];  [self addSubview:tempBtn];      // 初始化各個視圖  UIPickerView* yearPickerTemp = [[UIPickerView alloc] initWithFrame:CGRectMake(0, 44, 80, 216)];  [self setYearPicker:yearPickerTemp];  [self.yearPicker setFrame:CGRectMake(0*pRate, 44, 80*pRate, 216)];//  UILabel *label = [[UILabel alloc] initWithFrame:CGRectMake( 75*pRate, 141 ,20, 20)];//  label.font = [UIFont systemFontOfSize:18];//  label.text = @"年";//  [self addSubview:label];    UIPickerView* monthPickerTemp = [[UIPickerView alloc] initWithFrame:CGRectMake(80, 44, 56*pRate, 216)];  [self setMonthPicker:monthPickerTemp];  [self.monthPicker setFrame:CGRectMake(80*pRate, 44, 56*pRate, 216)];    UIPickerView* dayPickerTemp = [[UIPickerView alloc] initWithFrame:CGRectMake(141, 44, 60, 216)];  [self setDayPicker:dayPickerTemp];  [self.dayPicker setFrame:CGRectMake(126*pRate, 44, 60*pRate, 216)];    UIPickerView* hourPickerTemp = [[UIPickerView alloc] initWithFrame:CGRectMake(201, 44, 60, 216)];  [self setHourPicker:hourPickerTemp];  [self.hourPicker setFrame:CGRectMake(186*pRate, 44, 60*pRate, 216)];    UIPickerView* minutesPickerTemp = [[UIPickerView alloc] initWithFrame:CGRectMake(261, 44, 60, 216)];  [self setMinutePicker:minutesPickerTemp];  [self.minutePicker setFrame:CGRectMake(246*pRate, 44, 60*pRate, 216)];  NSArray *arrar = @[@"年",@"月",@"日",@"時",@"分"];  UILabel *NameLabel;  for (int i = 0; i < 5; i++) {   switch (i) {    case 0:    {     NameLabel = [[UILabel alloc] initWithFrame:CGRectMake( 75*pRate, 141 ,20, 20)];     break;    }    case 1:    {     NameLabel = [[UILabel alloc] initWithFrame:CGRectMake( 126*pRate, 141 ,20, 20)];     break;    }    case 2:    {     NameLabel = [[UILabel alloc] initWithFrame:CGRectMake( 186*pRate, 141 ,20, 20)];     break;    }    case 3:    {     NameLabel = [[UILabel alloc] initWithFrame:CGRectMake( 246*pRate, 141 ,20, 20)];     break;    }    case 4:    {     NameLabel = [[UILabel alloc] initWithFrame:CGRectMake( 296*pRate, 141 ,20, 20)];     break;    }    default:     break;   }   NameLabel.font = [UIFont systemFontOfSize:18];   NameLabel.text = [NSString stringWithFormat:@"%@",arrar[i]];   [self addSubview:NameLabel];  }        [self.yearPicker setDataSource:self];  [self.monthPicker setDataSource:self];  [self.dayPicker setDataSource:self];  [self.hourPicker setDataSource:self];  [self.minutePicker setDataSource:self];    [self.yearPicker setDelegate:self];  [self.monthPicker setDelegate:self];  [self.dayPicker setDelegate:self];  [self.hourPicker setDelegate:self];  [self.minutePicker setDelegate:self];        [self.yearPicker setTag:ePickerViewTagYear];  [self.monthPicker setTag:ePickerViewTagMonth];  [self.dayPicker setTag:ePickerViewTagDay];  [self.hourPicker setTag:ePickerViewTagHour];  [self.minutePicker setTag:ePickerViewTagMinute];      [self addSubview:self.yearPicker];  [self addSubview:self.monthPicker];  [self addSubview:self.dayPicker];  [self addSubview:self.hourPicker];  [self addSubview:self.minutePicker];    [self.yearPicker setShowsSelectionIndicator:YES];  [self.monthPicker setShowsSelectionIndicator:YES];  [self.dayPicker setShowsSelectionIndicator:YES];  [self.hourPicker setShowsSelectionIndicator:YES];  [self.minutePicker setShowsSelectionIndicator:YES];      [self resetDateToCurrentDate]; } return self;}#pragma mark - UIPickerViewDataSource- (NSInteger)numberOfComponentsInPickerView:(UIPickerView *)pickerView{ return 1;}//- (CGFloat)pickerView:(UIPickerView *)pickerView widthForComponent:(NSInteger)component{// if (ePickerViewTagYear == pickerView.tag) {//  return 60.0f;// } else {//  return 40.0f;// }//}-(NSInteger)pickerView:(UIPickerView *)pickerView numberOfRowsInComponent:(NSInteger)component{ if (ePickerViewTagYear == pickerView.tag) {  return [self.yearArray count]; }  if (ePickerViewTagMonth == pickerView.tag) {  return [self.monthArray count]; }  if (ePickerViewTagDay == pickerView.tag) {  return [self.dayArray count]; }  if (ePickerViewTagHour == pickerView.tag) {  return [self.hourArray count]; }  if (ePickerViewTagMinute == pickerView.tag) {  return [self.minuteArray count]; } return 0;}#pragma makr - UIPickerViewDelegate- (NSString *)pickerView:(UIPickerView *)pickerView titleForRow:(NSInteger)row forComponent:(NSInteger)component{ if (ePickerViewTagYear == pickerView.tag) {  return [self.yearArray objectAtIndex:row]; }  if (ePickerViewTagMonth == pickerView.tag) {  return [self.monthArray objectAtIndex:row]; }  if (ePickerViewTagDay == pickerView.tag) {  return [self.dayArray objectAtIndex:row]; }  if (ePickerViewTagHour == pickerView.tag) {  return [self.hourArray objectAtIndex:row]; }  if (ePickerViewTagMinute == pickerView.tag) {  return [self.minuteArray objectAtIndex:row]; } return @"";}- (void)pickerView:(UIPickerView *)pickerView didSelectRow:(NSInteger)row inComponent:(NSInteger)component{ if (ePickerViewTagYear == pickerView.tag) {  self.yearValue = [[self.yearArray objectAtIndex:row] intValue]; } else if(ePickerViewTagMonth == pickerView.tag){  self.monthValue = [[self.monthArray objectAtIndex:row] intValue]; } else if(ePickerViewTagDay == pickerView.tag){  self.dayValue = [[self.dayArray objectAtIndex:row]intValue]; } else if(ePickerViewTagHour == pickerView.tag){  self.hourValue = [[self.hourArray objectAtIndex:row]intValue]; } else if(ePickerViewTagMinute == pickerView.tag){  self.minuteValue = [[self.minuteArray objectAtIndex:row] intValue]; } if (ePickerViewTagMonth == pickerView.tag || ePickerViewTagYear == pickerView.tag) {  [self createMonthArrayWithYear:self.yearValue month:self.monthValue];  [self.dayPicker reloadAllComponents]; }  NSString* str = [NSString stringWithFormat:@"%04d%02d%02lu%02lu%02lu",self.yearValue, self.monthValue, (unsigned long)self.dayValue, (unsigned long)self.hourValue, (unsigned long)self.minuteValue];  [self setDate:[self dateFromString:str withFormat:@"yyyyMMddHHmm"]];}#pragma mark - 年月日閏年＝情況分析/** * 創建數據源 */-(void)createDataSource{ // 年 NSInteger yearInt = [[NSDate date] getYear]; [self.yearArray removeAllObjects]; for (int i=yearInt ; i<= yearInt + 10; i++) {  [self.yearArray addObject:[NSString stringWithFormat:@"%d",i]]; }  // 月 [self.monthArray removeAllObjects]; for (int i=1; i<=12; i++) {  [self.monthArray addObject:[NSString stringWithFormat:@"%d",i]]; }   NSInteger month = [[NSDate date] getMonth];  [self createMonthArrayWithYear:yearInt month:month];  // 時 [self.hourArray removeAllObjects]; for(int i=0; i<24; i++){  [self.hourArray addObject:[NSString stringWithFormat:@"%02d",i]]; }  // 分 [self.minuteArray removeAllObjects]; for(int i=0; i<60; i++){  [self.minuteArray addObject:[NSString stringWithFormat:@"%02d",i]]; }}#pragma mark --(void)resetDateToCurrentDate{ NSDate* nowDate = [NSDate date]; [self.yearPicker selectRow:0 inComponent:0 animated:YES]; [self.monthPicker selectRow:[nowDate getMonth]-1 inComponent:0 animated:YES]; [self.dayPicker selectRow:[nowDate getDay]-1 inComponent:0 animated:YES];  [self.hourPicker selectRow:[nowDate getHour] inComponent:0 animated:YES]; [self.minutePicker selectRow:[nowDate getMinute] inComponent:0 animated:YES];   [self setYearValue:[nowDate getYear]]; [self setMonthValue:[nowDate getMonth]]; [self setDayValue:[nowDate getDay]]; [self setHourValue:[nowDate getHour]]; [self setMinuteValue:[nowDate getMinute]];  NSString* str = [NSString stringWithFormat:@"%04d%02d%02d%02d%02d",self.yearValue, self.monthValue, self.dayValue, self.hourValue, self.minuteValue]; [self setDate:[self dateFromString:str withFormat:@"yyyyMMddHHmm"]]; self.dateString = [self dateString:self.date];}#pragma mark --(void)createMonthArrayWithYear:(NSInteger)yearInt month:(NSInteger)monthInt{ int endDate = 0; switch (monthInt) {  case 1:  case 3:  case 5:  case 7:  case 8:  case 10:  case 12:   endDate = 31;   break;  case 4:  case 6:  case 9:  case 11:   endDate = 30;   break;  case 2:   // 是否為閏年   if (yearInt % 400 == 0) {    endDate = 29;   } else {    if (yearInt % 100 != 0 && yearInt %4 ==4) {     endDate = 29;    } else {     endDate = 28;    }   }   break;  default:   break; }  if (self.dayValue > endDate) {  self.dayValue = endDate; } // 日 [self.dayArray removeAllObjects]; for(int i=1; i<=endDate; i++){  [self.dayArray addObject:[NSString stringWithFormat:@"%d",i]]; }}#pragma mark - 點擊確定按鈕-(void)actionEnter:(id)sender{ if (self.date == nil) {  self.date =[NSDate date]; } NSLog(@"====>%@",self.date); if (self.delegate && [self.delegate respondsToSelector:@selector(DatePickerDelegateEnterActionWithDataPicker:)]) {  [self.delegate DatePickerDelegateEnterActionWithDataPicker:self]; } [self removeFromSuperview];}#pragma mark - 設置提示信息-(void)setHintsText:(NSString*)hints{ [self.hintsLabel setText:hints];}#pragma mark --(void)removeFromSuperview{ self.delegate = nil; [super removeFromSuperview];}- (NSDate *)dateFromString:(NSString *)str withFormat:(NSString *)format{ NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init]; [dateFormatter setTimeZone:[NSTimeZone timeZoneWithAbbreviation:@"UTC"]]; [dateFormatter setDateFormat:format];   NSDate* dateFromString = [dateFormatter dateFromString:str]; return dateFromString;}- (NSString *)dateString:(NSDate *)date{NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init]; [dateFormatter setTimeZone:[NSTimeZone timeZoneWithAbbreviation:@"UTC"]];[dateFormatter setDateFormat:@"yyyyy-MM-dd HH:mm:ss"];NSString *dateString = [dateFormatter stringFromDate:date]; return dateString;}@end</pre><br><pre></pre><br>NSDate+Calendar.h<br><p></p><p class="p1"></p><pre code_snippet_id="2093925" snippet_file_name="blog_20170103_4_4657975" name="code" class="objc">#import <Foundation/Foundation.h>//頭文件部分@interface NSDate (Calendar)/** *獲取當前月的天數 */- (NSUInteger)YHBaseNumberOfDaysInCurrentMonth;/** *獲取本月第一天 */- (NSDate *)YHBaseFirstDayOfCurrentMonth;//下面這些方法用于獲取各種整形的數據/** *確定某天是周幾 */-(int)YHBaseWeekly;/** *年月日 時分秒 */-(int)getYear;-(int)getMonth;-(int)getDay;-(int)getHour;-(int)getMinute;-(int)getSecond;@end</pre><p></p><p class="p1"><br></p><p class="p1"><br></p>NSDate+Calendar.m<p class="p1"></p><pre code_snippet_id="2093925" snippet_file_name="blog_20170103_5_503109" name="code" class="objc">#import "NSDate+Calendar.h"@implementation NSDate (Calendar)-(NSUInteger)YHBaseNumberOfDaysInCurrentMonth{ return [[NSCalendar currentCalendar] rangeOfUnit:NSDayCalendarUnit inUnit:NSMonthCalendarUnit forDate:self].length;}- (NSDate *)YHBaseFirstDayOfCurrentMonth{ NSDate *startDate = nil; BOOL ok = [[NSCalendar currentCalendar] rangeOfUnit:NSMonthCalendarUnit startDate:&startDate interval:NULL forDate:self]; NSAssert1(ok, @"Failed to calculate the first day of the month based on %@", self); return startDate;}-(int)YHBaseWeekly{ return (int)[[NSCalendar currentCalendar] ordinalityOfUnit:NSDayCalendarUnit inUnit:NSWeekCalendarUnit forDate:self];}-(int)getYear{ NSCalendar *calendar = [NSCalendar currentCalendar]; NSUInteger unitFlags = NSYearCalendarUnit | NSMonthCalendarUnit | NSDayCalendarUnit | NSHourCalendarUnit | NSMinuteCalendarUnit | NSSecondCalendarUnit; NSDateComponents *dateComponent = [calendar components:unitFlags fromDate:self]; return (int)dateComponent.year;}-(int)getMonth{ NSCalendar *calendar = [NSCalendar currentCalendar]; NSUInteger unitFlags = NSYearCalendarUnit | NSMonthCalendarUnit | NSDayCalendarUnit | NSHourCalendarUnit | NSMinuteCalendarUnit | NSSecondCalendarUnit; NSDateComponents *dateComponent = [calendar components:unitFlags fromDate:self]; return (int)dateComponent.month;}-(int)getDay{ NSCalendar *calendar = [NSCalendar currentCalendar]; NSUInteger unitFlags = NSYearCalendarUnit | NSMonthCalendarUnit | NSDayCalendarUnit | NSHourCalendarUnit | NSMinuteCalendarUnit | NSSecondCalendarUnit; NSDateComponents *dateComponent = [calendar components:unitFlags fromDate:self]; return (int)dateComponent.day;}-(int)getHour{ NSCalendar *calendar = [NSCalendar currentCalendar]; NSUInteger unitFlags = NSYearCalendarUnit | NSMonthCalendarUnit | NSDayCalendarUnit | NSHourCalendarUnit | NSMinuteCalendarUnit | NSSecondCalendarUnit; NSDateComponents *dateComponent = [calendar components:unitFlags fromDate:self]; return (int)dateComponent.hour;}-(int)getMinute{ NSCalendar *calendar = [NSCalendar currentCalendar]; NSUInteger unitFlags = NSYearCalendarUnit | NSMonthCalendarUnit | NSDayCalendarUnit | NSHourCalendarUnit | NSMinuteCalendarUnit | NSSecondCalendarUnit; NSDateComponents *dateComponent = [calendar components:unitFlags fromDate:self]; return (int)dateComponent.minute;}-(int)getSecond{ NSCalendar *calendar = [NSCalendar currentCalendar]; NSUInteger unitFlags = NSYearCalendarUnit | NSMonthCalendarUnit | NSDayCalendarUnit | NSHourCalendarUnit | NSMinuteCalendarUnit | NSSecondCalendarUnit; NSDateComponents *dateComponent = [calendar components:unitFlags fromDate:self]; return (int)dateComponent.second;}@end</pre><br><br><br><p></p>     </pre>