PickerView小時和顯示在標籤

Question

我想知道我是如何創建一個選擇器視圖小時，然後我選擇出現在標籤....然後把這個小時在一個條件（中頻）。

任何人都可以幫助我嗎？

Answer 1

試試這個： 在.h文件中定義這些變量：

UIPickerView  *picker; 
NSArray   *HOURS_24; 
UILabel   *hourLabel; 

在viewDidLoad中：

HOURS_24=[[NSArray alloc] initWithObjects: @" 8:00", @" 9:00", @" 10:00", @" 11:00", 
      @" 12:00", @" 13:00", @" 14:00", @" 15:00", @" 16:00", @" 17:00", @" 18:00", nil]; 

//Add picker in XIB or add it using code like below. 
picker=[[UIPickerView alloc]initWithFrame:CGRectMake:(100,100,100,100)]; 
picker.delegate=self; 
[self.view addSubview:picker]; 

hourLabel=[[UILable alloc]initWithFrame:CGRectMake: (20,100,50,20)]; 
[self.view addSubview:hourLabel]; 
hourLabel.text=@"This is hour label"; 

添加這些功能

#pragma mark PickerView DataSource 

- (NSInteger)numberOfComponentsInPickerView: 
    (UIPickerView *)pickerView 
{ 
    return 1; 
} 
- (NSInteger)pickerView:(UIPickerView *)pickerView 
    numberOfRowsInComponent:(NSInteger)component 
{ 
    return [HOURS_24 count]; 
} 
- (NSString *)pickerView:(UIPickerView *)pickerView 
    titleForRow:(NSInteger)row 
    forComponent:(NSInteger)component 
{ 
    return [HOURS_24 objectAtIndex:row]; 
} 

實施委託：

-(void)pickerView:(UIPickerView *)pickerView didSelectRow:(NSInteger)row 
    inComponent:(NSInteger)component 
{ 
    hourLabel.text=[HOURS_24 objectAtIndex:row]; 
} 

Answer 2

通過這個樣本項目------- http://www.dosomethinghere.com/wp-content/uploads/2010/11/DatePickerExample.zip

做檢查，你可以使用的.text標籤例如如果（日期label.text == .......） 希望這可以幫助...