Iphone [Tab Bar实现多view切换,Picker,DataPicter实现

用Tab Bar Controller处理IPhone多个view切换，

而且还附有创建空项目,picker和DataPicker的实现！

具体步骤：

1.创建一个空项目，选择User Interface->View,命名为rootView。

2.然后在控件面板中拖一个Tab Bar Controller的控件，可以往里面添加Tab Button,将Tab Bar Controller的File's Owner改成AppDelegate，可以将其每一个Item View的Class属性改成对于的ViewController

3.在Appdelegate.m中设置根view

1. - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
2. {
3. self.window = [[[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]] autorelease];
4. //通过目录导入xib文件中所有的内容
5. NSArray *arr = [[NSBundle mainBundle] loadNibNamed:@"rootView" owner:self options:nil];
6. NSLog(@"%@",arr);
7. self.window.rootViewController = self.rootView;
8. self.window.backgroundColor = [UIColor whiteColor];
9. [self.window makeKeyAndVisible];
10. return YES;
11. }

4.DateViewPicker的实现

dateViewController.h:

1. #import <UIKit/UIKit.h>
2. @interface dataViewController : UIViewController
3. @property (retain, nonatomic) IBOutlet UIDatePicker *datePicker;
4. - (IBAction)click:(id)sender;
5. @property (retain, nonatomic) IBOutlet UILabel *lblShow;
6. @end

dateViewController.m:

1. #import "dataViewController.h"
2. @interface dataViewController ()
3. @end
4. @implementation dataViewController
5. - (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
6. {
7. self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
8. if (self) {
9. // Custom initialization
10. }
11. return self;
12. }
13. - (void)viewDidLoad
14. {
15. [super viewDidLoad];
16. //self.datePicker.date = [NSData date];
17. [NSTimer scheduledTimerWithTimeInterval:1 target:self selector:@selector(changeDate) userInfo:nil repeats:YES];
18. }
19. -(void)changeDate
20. {
21. self.datePicker.date = [NSDate date];
22. }
23. - (void)didReceiveMemoryWarning
24. {
25. [super didReceiveMemoryWarning];
26. // Dispose of any resources that can be recreated.
27. }
28. - (void)dealloc {
29. [_datePicker release];
30. [_lblShow release];
31. [super dealloc];
32. }
33. - (IBAction)click:(id)sender {
34. NSData *date = self.datePicker.date;
35. NSDateFormatter *formater=[[[NSDateFormatter alloc] init] autorelease];
36. //设置日期格式
37. formater.dateFormat = @"yyyy-MM-dd HH:mm:ss";//HH代表24时制,hh代表12时制
38. NSString *str  = [formater stringFromDate:date];
39. //设置时区
40. formater.locale = [[[NSLocale alloc] initWithLocaleIdentifier:@"zh_CN"] autorelease];
41. date = [formater dateFromString:@"2013-08-15 14:03:00"];
42. NSLog(@"字符串转化成日期是:%@",date);
43. NSLog(@"%@",str);
44. UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"当前时间" message:str delegate:nil cancelButtonTitle:@"OK" otherButtonTitles: nil];
45. [alert show];
46. self.lblShow.text = str;
47. }
48. @end

PickerView的实现：

viewController.h:

#import <UIKit/UIKit.h>

//注意：在使用pickerView的时候要将控件拖向File's Owner，将DataSourse和Delegate指向File's Owner，并且要实现他的两个协议

@interface SecondViewController :UIViewController<UIPickerViewDataSource,UIPickerViewDelegate>

@property (retain,nonatomic)IBOutletUIPickerView *picker;

- (IBAction)click:(id)sender;

@property(nonatomic,retain)NSArray *array;

@end

viewController.m:

1. #import "SecondViewController.h"
2. @interface SecondViewController ()
3. @end
4. @implementation SecondViewController
5. - (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
6. {
7. self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
8. if (self) {
9. // Custom initialization
10. }
11. return self;
12. }
13. - (void)viewDidLoad
14. {
15. [super viewDidLoad];
16. NSArray *arr = [NSArray arrayWithObjects:@"shanghai",@"nanjign",@"tianjin",@"nantong",@"beijing",nil];
17. self.array = arr;
18. }
19. - (void)didReceiveMemoryWarning
20. {
21. [super didReceiveMemoryWarning];
22. // Dispose of any resources that can be recreated.
23. }
24. - (void)dealloc {
25. [_picker release];
26. [super dealloc];
27. }
28. #pragma mark datasourse
29. //每个组件有多少行数据
30. -(NSInteger)pickerView:(UIPickerView *)pickerView numberOfRowsInComponent:(NSInteger)component
31. {
32. return [self.array count];
33. }
34. //PickerView有几个组件
35. -(NSInteger)numberOfComponentsInPickerView:(UIPickerView *)pickerView
36. {
37. return 1;
38. }
39. #pragma mark delegate
40. //每个组件中的每行显示什么数据
41. -(NSString *)pickerView:(UIPickerView *)pickerView titleForRow:(NSInteger)row forComponent:(NSInteger)component
42. {
43. return [self.array objectAtIndex:row];
44. }
45. - (IBAction)click:(id)sender {
46. int row = [self.picker selectedRowInComponent:0];//获得第几个组件中被选中的行数
47. NSString *str = [self.array objectAtIndex:row];//通过第几行，在数据中获得被选中的字符串
48. UIAlertView *alert = [[[UIAlertView alloc] initWithTitle:@"title" message:str delegate:nil cancelButtonTitle:@"OK" otherButtonTitles:nil] autorelease];
49. [alert show];
50. }
51. @end

效果图：

如果有两个Component的话：

viewController.h:

1. #import <UIKit/UIKit.h>
2. @interface FirstViewController : UIViewController<UIPickerViewDataSource,UIPickerViewDelegate>
3. @property (retain, nonatomic) IBOutlet UIPickerView *picker;
4. @property(nonatomic,retain)NSArray *array;
5. @property(nonatomic,retain)NSArray *array2;
6. - (IBAction)click:(id)sender;
7. @end

viewController.m:

1. #import "FirstViewController.h"
2. #define component_0 0
3. #define other_component 1
4. @interface FirstViewController ()
5. @end
6. @implementation FirstViewController
7. - (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
8. {
9. self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
10. if (self) {
11. // Custom initialization
12. }
13. return self;
14. }
15. - (void)viewDidLoad
16. {
17. [super viewDidLoad];
18. NSArray *array = [NSArray arrayWithObjects:@"上海",@"北京",@"天津",@"成都",@"台湾",@"香港",@"江苏",@"武汉",@"黑龙江",@"浙江", nil];
19. self.array = array;
20. array = @[@"路飞",@"乔巴",@"香吉士",@"索隆",@"娜美",@"罗宾",@"乌索普",@"弗兰奇",@"骷髅头"];
21. self.array2 = array;
22. //用来设置默认选项
23. [self.picker selectRow:2 inComponent:component_0 animated:YES];
24. [self.picker selectRow:3 inComponent:other_component animated:YES];
25. }
26. //每个组件有几行数据
27. -(NSInteger)pickerView:(UIPickerView *)pickerView numberOfRowsInComponent:(NSInteger)component
28. {
29. //创建数据
30. if(component == component_0)
31. {
32. return [self.array count];   //动态获取数字
33. }else{
34. return [self.array2 count];
35. }
36. }
37. #pragma mark delegate
38. //每个组件的每行显示什么数据
39. -(NSString *)pickerView:(UIPickerView *)pickerView titleForRow:(NSInteger)row forComponent:(NSInteger)component
40. {
41. if(component == component_0)
42. {
43. return [self.array objectAtIndex:row];
44. }else{
45. return [self.array2 objectAtIndex:row];
46. }
47. }
48. -(NSInteger)numberOfComponentsInPickerView:(UIPickerView *)pickerView
49. {
50. return 2;
51. }
52. //当你对一个pickerView进行了一次操作之后都会被调用
53. -(void)pickerView:(UIPickerView *)pickerView didSelectRow:(NSInteger)row inComponent:(NSInteger)component
54. {
55. NSString *str = nil;
56. if(component == component_0)
57. {
58. str = [self.array objectAtIndex:row];
59. }
60. else
61. {
62. str = [self.array2 objectAtIndex:row];
63. }
64. NSLog(@"%@",str);
65. }
66. - (void)dealloc {
67. [_picker release];
68. [_array release];
69. [_array2 release];
70. [super dealloc];
71. }
72. - (IBAction)click:(id)sender {
73. int row = [self.picker selectedRowInComponent:component_0];   //第几个组件中被选中的行数
74. NSString * str = [self.array objectAtIndex:row];   //通过第几行，在数据中获得被选中的字符串
75. row = [self.picker selectedRowInComponent:other_component];
76. NSString *str1 = [self.array2 objectAtIndex:row];
77. NSString *str3 = [NSString stringWithFormat:@"%@ %@",str,str1];
78. UIAlertView * alert = [[UIAlertView alloc] initWithTitle:@"Title" message:str3 delegate:nil cancelButtonTitle:@"OK" otherButtonTitles:nil];
79. [alert show];
80. }
81. @end