UI基础 - UIDatePicker - 低头捡石頭

UI基础 - UIDatePicker

■ 简言

1. UIDatePicker 是时间选择器：它可以获取选择的日期时间、设置显示语言、12/24 小时进制、获取本地时间、限制选择时间的选择范围、格式化显示输出所需要的显示时间等

■ 使用方式

1. 基本使用

 1 UIDatePicker *datePicker = [[UIDatePicker alloc] init];
 2 [datePicker setTimeZone:[NSTimeZone defaultTimeZone]]; // 默认时区：格林尼治时间
 3 [datePicker setTimeZone:[NSTimeZone timeZoneWithName:@"GMT+8"]];// 时区：中国
 4 NSLog(@"%@",datePicker.date);
 5 
 6 datePicker.backgroundColor = [UIColor yellowColor];
 7 datePicker.frame = CGRectMake(20, 20, self.view.frame.size.width - 40, 90);// 宽高系统默认:(0, 0, 320, 216)
 8 datePicker.datePickerMode = UIDatePickerModeDate;// 显示样式：月  日  年
 9 
10 NSLocale *local = [[NSLocale alloc] initWithLocaleIdentifier:@"English"];// 本地语言：英文
11 [datePicker setLocale:local];
12 
13 datePicker.maximumDate = datePicker.date;// 可滚动至最大时间
14 [self.view addSubview:datePicker];

运行效果

2. 有两个文本框，均默认显示当前时间；当点击任一文本框时则弹出时间选择器，将选定的时间显示在文本框中

 1 #import "ViewController.h"
 2 @implementation ViewController
 3 
 4 - (void)viewDidLoad {
 5     [super viewDidLoad];
 6     
 7     // 时间选择器
 8     UIDatePicker *datePicker = [[UIDatePicker alloc] init];
 9     datePicker.backgroundColor = [UIColor orangeColor];
10     [datePicker setDatePickerMode:UIDatePickerModeDate];
11     [datePicker addTarget:self action:@selector(showDate:) forControlEvents:UIControlEventValueChanged];// 滑动时间触发
12     // 文本框：显示年、月、日、星期
13     UITextField *dateTextField = [[UITextField alloc] initWithFrame:CGRectMake(20,50, self.view.frame.size.width - 40, 30)];
14     dateTextField.backgroundColor = [UIColor brownColor];
15     dateTextField.clearsOnBeginEditing = YES;
16     dateTextField.textAlignment = NSTextAlignmentCenter;
17     dateTextField.borderStyle = UITextBorderStyleRoundedRect;
18     dateTextField.tag = 200;
19     dateTextField.placeholder = @"请选取日期";
20     // date、String 转换
21     NSDateFormatter *formatter1 = [[NSDateFormatter alloc] init];
22     formatter1.dateFormat = @"yyyy-MM-dd EE";// 日期格式
23     dateTextField.text = [formatter1 stringFromDate:datePicker.date];
24     dateTextField.inputView = datePicker;
25     [self.view addSubview:dateTextField];
26     
27     
28     // 时间选择器
29     UIDatePicker *timePicker = [[UIDatePicker alloc] init];
30     timePicker.backgroundColor = [UIColor yellowColor];
31     [timePicker setDatePickerMode:UIDatePickerModeTime];
32     NSLocale *local = [[NSLocale alloc] initWithLocaleIdentifier:@"Chinese"];
33     [timePicker setLocale:local];
34     [timePicker addTarget:self action:@selector(showTime:) forControlEvents:UIControlEventValueChanged];
35     // 文本框：显示时、分、秒
36     UITextField *timeTextField = [[UITextField alloc] initWithFrame:CGRectMake(20, 120, self.view.frame.size.width - 40, 30)];
37     timeTextField.placeholder = @"请选择时间";
38     timeTextField.clearsOnBeginEditing = YES;
39     timeTextField.textAlignment = NSTextAlignmentCenter;
40     timeTextField.borderStyle = UITextBorderStyleRoundedRect;
41     timeTextField.tag = 201;
42     timeTextField.inputView = timePicker;
43     // date、String 转换
44     NSDateFormatter *formatter2 = [[NSDateFormatter alloc] init];
45     formatter2.dateFormat = @"hh:mm:ss-aa";
46     timeTextField.text = [formatter2 stringFromDate:timePicker.date];
47     timeTextField.inputView = timePicker;
48     [self.view addSubview:timeTextField];
49     
50 }
51 
52 
53 // 显示日期
54 - (void)showDate:(UIDatePicker *)datePicker{
55     
56     UITextField *dateTextField = (UITextField *)[self.view viewWithTag:200];
57     NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
58     formatter.dateFormat = @"yyyy-MM-dd EE";
59     dateTextField.text = [formatter stringFromDate:datePicker.date];
60 }
61 
62 // 显示具体时间
63 - (void)showTime:(UIDatePicker *)timePicker{
64     
65     UITextField *timeTextField = (UITextField *)[self.view viewWithTag:201];
66     NSDateFormatter * formatter = [[NSDateFormatter alloc] init];
67     formatter.dateFormat = @"hh:mm:ss-aa";
68     timeTextField.text = [formatter stringFromDate:timePicker.date];
69 }
70 
71 
72 // 键盘回收
73 -(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event{
74     
75     [self.view endEditing:YES];
76 }
77 
78 
79 @end