将对象传递给选择器动作

Question

Ok simple question but can't find an answer.

I'v got a button to save information in my app. I have

  NSMutableArray *textFields = [[NSMutableArray alloc] initWithCapacity:5];
    UITextField *textField = nil;

This is the information i want to save, i'v got 5 textfields in textFields mutablearray.

[save addTarget:self action:@selector(saveInfo)
 forControlEvents:UIControlEventTouchUpInside];

and

-(void)saveInfo {
    [[[NSUserDefaults standardUserDefaults] setValue: ????? forKey:@"Phone"];
    [[NSUserDefaults standardUserDefaults] synchronize];
}

The question is how to access and get information from like textFields[1].text in my saveInfo void ?

Ok To get things a little bit clearer i'v added the whole class. its not very big, and maybe someone could see thats the problem with my implementation .

@implementation Settings

- (id)init: (TableViewController*) TableControll {
  NSMutableArray *textFields = [[NSMutableArray alloc] initWithCapacity:5];
    UITextField *textField = nil;

    for (int i = 0; i < 3; i++) {
        textField = [[UITextField alloc] initWithFrame:CGRectMake(0.0f, 0.0f+(i*35), 120.0f, 30.0f)];
        textField.backgroundColor = [UIColor whiteColor];
        [textField setBorderStyle:(UITextBorderStyleRoundedRect)];
        [TableControll.view addSubview:textField];

        [textFields addObject:textField];
        [textField release]; textField = nil;
    }
    UITextField *textName = textFields[0];
    textName.placeholder = @"Vardas";

    UITextField *textNo = textFields[1];
    textNo.placeholder = @"Telefonas";
    textNo.keyboardType = UIKeyboardTypeNumberPad;
    UITextField *textPin = textFields[2];
    textPin.keyboardType = UIKeyboardTypeNumberPad;
    textPin.placeholder = @"Pin";

    UIButton *button = [UIButton buttonWithType:UIButtonTypeRoundedRect];
    button.frame = CGRectMake(150, 20, 160, 30);
    [button setTitle:@"Advanced settings" forState:UIControlStateNormal];
    [TableControll.view addSubview:button];
    UIButton *save = [UIButton buttonWithType:UIButtonTypeRoundedRect];
    save.frame = CGRectMake(150, 60, 160, 30);
    [save setTitle:@"Save settings" forState:UIControlStateNormal];
    [TableControll.view addSubview:save];
    [button addTarget:self action:@selector(goAdvanced)
     forControlEvents:UIControlEventTouchUpInside];
    [save addTarget:self action:@selector(saveInfo)
     forControlEvents:UIControlEventTouchUpInside];

    return self;
}

-(void)goAdvanced {
    AppDelegate *newControll = (AppDelegate*)[UIApplication sharedApplication].delegate;
    [newControll ChangeController];
}

-(void)saveInfo {

    for(int i=0;i<5;i++) {
        UITextField *tempTxtField=[_textFields objectAtIndex:i];
        NSLog(@"do it %@",tempTxtField.text);
    }

}

@end

Answer 1

What you'd want to do if you are using interface builder is create a bunch of IBOutlet for your textfields instead of keeping them in an array. Check out this: tutorial

Now it looks like you're creating things by hand, so in this case, you probably just want to declare your array as @property so it can be accessed by your save method.

Answer 2

要从数组访问UITextField的text属性，应编写：

((UITextField *)[textFields objectAtIndex:1]).text

Answer 3

If you want to access the all textfield,

  for(int i=0;i<[textFields count];i++) {
    UITextField *tempTxtField=[textFields objectAtIndex:i];
    NSlog(@"%@",tempTxtField);
}

Answer 4

-(void)saveInfo {
    NSMutableArray *tempArr = [NSMutableArray array];
    for(int i = 0; i < [textFieldsArray count]; i++){
        [tempArr addObject:[(UITextField*)[textFieldsArray objectAtIndex:i]text]];
    }
    [[[NSUserDefaults standardUserDefaults] setValue:tempArr forKey:@"Phone"];
    [[NSUserDefaults standardUserDefaults] synchronize];
}

Answer 5

I'm not entirely sure I understand your question, but this is what I would do in your place. Instead of creating an array to hold each of the textfields, I'd just assign them a custom tag. Any number will work (although avoid zero since that's the default tag on all views). So your init method would look like this:

for (int i = 0; i < 3; i++) {
    textField = [[UITextField alloc] initWithFrame:CGRectMake(0.0f, 0.0f+(i*35), 120.0f, 30.0f)];
    textField.backgroundColor = [UIColor whiteColor];
    textField.tag = (i+1);
    [textField setBorderStyle:(UITextBorderStyleRoundedRect)];
    [TableControll.view addSubview:textField];
    [textField release]; textField = nil;
}

Then in the code that you want to reference the text field, you'd retrieve the view by its tag, making sure to cast it as UITextField.

-(void)saveInfo {

for(int i=0;i<5;i++) {
    UITextField *textField = nil;
    UIView *view = [self.view viewsWithTag:i];
    if ([view isKindOfClass:[UITextField class]]) {
        textField = (UITextField *) view;
        NSLog(@"do it %@",textField.text)
    }

}

}

NOTE: I'm referencing self.view but you'll need to reference TableControll.view. You'll need to retain a reference to it somewhere in your code. Also, I'd recommend your start using ARC.

Hope that helps! Good luck!