Question

我有一个方法应该将输入到文本字段中的内容保存为字符串（稍后将保存到NSMutableArray中），然后在退出文本字段后调出一个操作表，该字段将进一步指定字符串，具体取决于哪个单击按钮。请帮忙！我在高中时试图为我的高级项目编写程序，所以任何帮助都非常感谢！谢谢！

@implementation EnteringCoursesViewController

@synthesize classField;
@synthesize indicatedClass;
@synthesize labelClassTitle;
@synthesize selectRotationController;
@synthesize classesEnteredTable;
- (IBAction)classFieldDoneEditing:(id)sender 
            withActionSheet:(UIActionSheet *)typeSheet 
            clickedButtonAtIndex:(NSInteger)buttonIndex
{
    self.indicatedClass = classField.text;
    NSString *greeting = [[NSString alloc] 
                          initWithFormat:@"%@", indicatedClass];
    labelClassTitle.text = greeting;
    labelClassTitle.hidden = NO;
    [greeting release];
    [sender resignFirstResponder];

    typeSheet = [[UIActionSheet alloc]
                                initWithTitle:@"Class types"delegate:self
                                cancelButtonTitle:nil
                                destructiveButtonTitle:nil
                                otherButtonTitles:@"Core Class", @"Elective", nil];
    [typeSheet showInView:self.view];
    [typeSheet release];

    if (buttonIndex == 0) {
        self.indicatedClass = classField.text;
        NSString *indicatedString = indicatedClass;
        NSString *greeting = [[NSString alloc]       
                              initWithFormat:@"%@ meets 6 times per rotation",     indicatedString];
        labelClassTitle.text = greeting;
        labelClassTitle.hidden = NO;
        [greeting release];
        [indicatedClass release];
    }

    else if (buttonIndex == 1) {
        self.indicatedClass = classField.text;
        NSString *indicatedString = indicatedClass;
        NSString *greeting = [[NSString alloc] 
                              initWithFormat:@"%@ meets 3 times per rotation", indicatedString];
        labelClassTitle.text = greeting;
        labelClassTitle.hidden = NO;
        [greeting release];
        [indicatedClass release];
    } 


}

对理论方法的评论很有帮助，但由于我对此很陌生，所以我非常喜欢特定的编码感谢。

@interface EnteringCoursesViewController : UIViewController {
    UILabel             *labelClassTitle;
    NSString            *indicatedClass;
    UITextField         *classField;
    UIViewController    *selectRotationController;
    UITableView         *classesEnteredTable;
}
@property (nonatomic, retain) IBOutlet UILabel      *labelClassTitle;
@property (nonatomic, copy) NSString                *indicatedClass;
@property (nonatomic, retain) IBOutlet UITextField  *classField;
@property (nonatomic, retain) UIViewController      *selectRotationController;
@property (nonatomic, retain) IBOutlet UITableView  *classesEnteredTable;

- (IBAction)chooseFirstMeeting:(id)sender;
- (IBAction)classFieldDoneEditing:(id)sender withActionSheet:(UIActionSheet *)typeSheet 
             clickedButtonAtIndex:(NSInteger)buttonIndex;

Answer 1

您可以通过向与按钮连接的操作添加多个参数，将方法迁移到一个方法。代码应该是这样的：

- (IBAction)cassFieldDoneEditing:(id)sender 
            withActionSheet:(UIActionSheet *)typeSheet 
            clickedButtonAtIndex:(NSInteger)buttonIndex
{
    self.indicatedClass = classField.text;
    NSString *greeting = [[NSString alloc] 
                          initWithFormat:@"%@", indicatedClass];
    labelClassTitle.text = greeting;
    labelClassTitle.hidden = NO;
    [greeting release];

    [sender resignFirstResponder];
    UIActionSheet *typeSheet = [[UIActionSheet alloc]
                                initWithTitle:@"Class types"delegate:self
                                cancelButtonTitle:nil
                                destructiveButtonTitle:nil
                                otherButtonTitles:@"Core Class", @"Elective", nil];
    [typeSheet showInView:self.view];
    [typeSheet release];



    if (buttonIndex == 0) {
        self.indicatedClass = classField.text;
        NSString *indicatedString = indicatedClass;
        NSString *greeting = [[NSString alloc] 
                              initWithFormat:@"%@ meets 6 times per rotation",     indicatedString];
        labelClassTitle.text = greeting;
        labelClassTitle.hidden = NO;
        [greeting release];
        [indicatedClass release];
    }

    else if (buttonIndex == 1) {
        self.indicatedClass = classField.text;
        NSString *indicatedString = indicatedClass;
        NSString *greeting = [[NSString alloc] 
                              initWithFormat:@"%@ meets 3 times per rotation", indicatedString];
        labelClassTitle.text = greeting;
        labelClassTitle.hidden = NO;
        [greeting release];
        [indicatedClass release];
    } 

    [theSmallArray addObject:indicatedClass];

}

由于我没有测试过代码，因此可能存在错误。如果你有任何问题，请报告回来吗？

有一种方法可以将输入的文本保存到字符串中并调出一个uiaction表，然后根据选择的按钮改变字符串

1 个答案: