的UIDatePicker和UITextView的

Question

我想顯示文本UITextView取決於日期，有的東西一樣「在這一天應用」，我有此代碼的

-(void)changingText:(id)sender { 

    NSDateFormatter *df = [[NSDateFormatter alloc] init]; 

    df.dateStyle = NSDateFormatterMediumStyle; 

    label.text = [NSString stringWithFormat:@"%@", [df stringFromDate:datePicker.date]]; 
    NSDictionary *pageData = [[DataSource sharedDataSource] dataForPage:pageIndex]; 

    NSString *dateText = [pageData objectForKey:@"pageName"]; 

    NSString *dateInfo = [df stringFromDate:datePicker.date]; 

    if ([dateText isEqualToString: dateInfo]) { 
     myText.text = [pageData objectForKey:@"pageText"]; 
    } 
    [df release]; 
} 

我qustion是如何更新UITextView隨着來自NSDictionery ForKey@"pageText"的數據，因爲它只顯示第一個對象。

這裏是我想要選擇日期時生氣的對象。

- (id)init { 
    self = [super init]; 
    if (self != nil) 
    { 
     dataPages = [[NSArray alloc] initWithObjects: 
        [NSDictionary dictionaryWithObjectsAndKeys: 
         @"Oct 3, 2009", @"pageName", 
         @"First Object", @"pageText", 
         nil], 

        [NSDictionary dictionaryWithObjectsAndKeys: 
         @"Oct 10, 2009", @"pageName", 
         @"second Object", @"pageText", 
         nil], 

        [NSDictionary dictionaryWithObjectsAndKeys: 
         @"Oct 27, 2009", @"pageName", 
         @"Third Object", @"pageText", 
         nil],      
        nil]; 
    } 
    return self; 
} 

Answer 1

我不知道如果我理解你的問題，但我認爲你需要從你的字典對象變成一個NSString這樣的：

-(void)changingText:(id)sender{ 
    NSDateFormatter *df = [[NSDateFormatter alloc] init]; 

    df.dateStyle = NSDateFormatterMediumStyle; 

    NSDictionary *pageData = [[DataSource sharedDataSource] dataForPage:pageIndex]; 
    NSString *dateText = (NSString *)[pageData objectForKey:@"pageName"]; 
    NSString *dateInfo = [df stringFromDate:datePicker.date]; 

    label.text = [NSString stringWithFormat:@"%@", [df stringFromDate:dateInfo]]; 
    if ([dateText isEqualToString: dateInfo]) { 
     myText.text = dateText; 
    } 

    [df release]; 
}