UIPickerView 选择更新 UITextFields 的 NSArray

Question

I have created a UIScrollView that contains a dynamic number of UIViews. Inside each UIView will be a dynamic number of UItextField s.

The view itself looks like this

This white boxes are the UIViews and the black boxes are the UITextfield s.

I have a method that puts these UITextfield s into an array of arrays. So you have an array of UIView s then in each array there is an array of UITextfield s.

that code looks like this.

for(int i = 0; i< viewcount; i++) {
        color = color + 20;
        NSLog(@"%f", color);
        CGFloat y = i * 91;

        UIScrollView *axisContainerScrollView = [[UIScrollView alloc] initWithFrame:CGRectMake(0.0, y,self.view.frame.size.width, 90.0)];
        axisContainerScrollView.contentSize = CGSizeMake(600.0, 90.0);
        axisContainerScrollView.backgroundColor = [UIColor whiteColor];
        [htmlContainerScrollView addSubview:axisContainerScrollView];

//        UIView *view = [[UIView alloc] initWithFrame:CGRectMake(0, y,self.view.frame.size.width, 90.0)];
        UIView *view = [[UIView alloc] initWithFrame:CGRectMake(0.0, 0.0, 640.0, 90.0)];
        view.backgroundColor = [UIColor colorWithRed:0/255.0 green:0/255.0 blue:0/255.0 alpha:(1.0/i)];;
        [axisContainerScrollView addSubview:view];

        int cutCount = [cutsString integerValue];
        int positions = (view.frame.size.width/cutCount);

        for (int i = 0; i < cutCount; i++) {
            //first one
            UITextField *cutField = [[UITextField alloc] initWithFrame:CGRectMake(((positions*i)-(20/2)+(positions/2)), 25, 20, 20)];
            cutField.textColor = [UIColor colorWithRed:0/256.0 green:84/256.0 blue:129/256.0 alpha:1.0];
            cutField.font = [UIFont fontWithName:@"Helvetica-Bold" size:25];
            cutField.backgroundColor=[UIColor whiteColor];
            [view addSubview:cutField];

            [columnArrayOfTextFields addObject:cutField]; // array of textfields
        }
        [rowArrayOfTextFields addObject:columnArrayOfTextFields]; // array of arrays

    }

What I would like help with is how to then step through each UITextField and enter a value from a UIPickerView . so as you select values you populate each UITextField from left to right and progress downwards through each UItextField .

I have a gesture recognizer for the UIPickerView where it calles a method like this

UITapGestureRecognizer *singleFingerTap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(pickerTap:)];

I think the NSArray of NSArrays is a good start but I'm just not sure how to progress from here.

Answer 1

If I understand correctly, you can use the tag property of the UIView

What I usually do (since I've come to this problem myself) is :

A . You have a known number of elements and you assign the tags from 1 to n

B . If you can add/delete/or you just have a dynamic number of elements, multiply prime numbers with 1 , 2 , 3 etc.

• For example, on line 1 you use prime number 3 . So your text fields will have tags like 3 , 6 , 9 , 12 , 15 and 18
• Then for second line you will use 7 . So you will have your text field tagged with 7 , 14 , 21 , 28 , 35 and 43
• For line 3 you use 11
• For line 4 you use 13 and so on ...

There's a lot of way it can be done, these are just on top of my head or actually what I use, if I haven't understood correctly what you want, feel free to let me know.