UIDatePicker提供了一個快速選擇日期和時間的控件,他是UIControl的子類,專門用於日期時間的選擇。其樣式能夠經過UIDatePicker的屬性進行靈活設置,同時也能夠獲取到當前UIDatePicker的值。UIDatePicker有幾個方法和屬性須要重點掌握。ide
@property (nonatomic) UIDatePickerMode datePickerMode; //設置UIDatePicker的展現樣式,有四種樣式atom
UIDatePickerModeTime, // 僅顯示時間
UIDatePickerModeDate, // 顯示年月日
UIDatePickerModeDateAndTime, // 顯示年月日和時間
UIDatePickerModeCountDownTimer //倒計時spa
@property (nullable, nonatomic, strong) NSLocale *locale; //設置地區,地區的設置會影響日期以及時間文字的展現方式
@property (nullable, nonatomic, strong) NSTimeZone *timeZone; //設置時區code
@property (nonatomic, strong) NSDate *date; //獲取當前日期/時間值orm
- (void)setDate:(NSDate *)date animated:(BOOL)animated;//設置當前顯示的日期時間blog
下面來看一個完整示例,選擇時間後點擊肯定按鈕會彈出提示框,提示框內容爲選擇的時間字符串
#import "ViewController.h" @interface ViewController () @property(nonatomic,strong)UIDatePicker *datePicker; @property(nonatomic,strong)UIButton *button; @end @implementation ViewController - (void)viewDidLoad { [super viewDidLoad]; [self.view addSubview:self.datePicker]; [self.view addSubview:self.button]; } //懶加載 - (UIDatePicker *)datePicker{ if (_datePicker == nil) { self.datePicker = [[UIDatePicker alloc]initWithFrame:CGRectMake(0, 280, self.view.frame.size.width, 200)]; _datePicker.datePickerMode = UIDatePickerModeDateAndTime; _datePicker.locale = [[NSLocale alloc]initWithLocaleIdentifier:@"zh_CN"]; } return _datePicker; } //懶加載按鈕,用於展現datePicker選中的時間 - (UIButton *)button{ if (_button == nil) { self.button = [[UIButton alloc]initWithFrame:CGRectMake((self.view.frame.size.width - 50) / 2.0, 100, 50, 30)]; [_button setTitle:@"肯定" forState:UIControlStateNormal]; _button.backgroundColor = [UIColor blueColor]; [_button addTarget:self action:@selector(clickButton) forControlEvents:UIControlEventTouchUpInside]; } return _button; } //肯定按鈕被點擊 - (void)clickButton{ //獲取用戶經過UIDatePicker設置的時間 NSDate *date = [self.datePicker date]; //建立一個日期格式器 NSDateFormatter *dateFormatter = [[NSDateFormatter alloc]init]; //爲日期格式器設置格式字符串 [dateFormatter setDateFormat:@"yyyy年MM月dd日 HH:mm +0800"]; //使用日期格式器格式化日期和時間 NSString *dateString = [dateFormatter stringFromDate:date]; NSString *message = [NSString stringWithFormat:@"您選擇的日期和時間是:%@",dateString]; //警告框 UIAlertController *alert = [UIAlertController alertControllerWithTitle:@"日期和時間" message:message preferredStyle:UIAlertControllerStyleAlert]; UIAlertAction *action = [UIAlertAction actionWithTitle:@"肯定" style:UIAlertActionStyleDefault handler:nil]; [alert addAction:action]; [self presentViewController:alert animated:YES completion:nil]; } @end
運行截圖:get