如何使用带有标签的目标 c 从文本字段访问文本值？

Question

Output image实际上我是目标 c 的新手。我的问题是如何从带有标签的文本字段中获取文本。文本字段位于嵌套的 uistackview 内。所以我无法从嵌套的 uistackview 中获取文本字段的值。如何使用objective c从stackview中获取文本？

如图所示，我仅从最后一个文本字段而不是从以上两个文本字段获取文本。我是动态创建的文本字段，我应该如何获取每个文本字段的文本？

else if ([key isEqualToString: textbox]){

            NSDictionary *widthAndHieght = [rowNames objectForKey:key];

            //NSLog(@"Hieght: %@",[widthAndHieght objectForKey:@"height"]);
            //NSLog(@"Width: %@",[widthAndHieght objectForKey:@"width"]);

            int height = [[widthAndHieght objectForKey:@"height"]intValue];
            int width = [[widthAndHieght objectForKey:@"width"]intValue];
            NSString *intTag = [[widthAndHieght objectForKey:@"tag"] objectForKey:@"tagInt"];

            myTextField = [[UITextField alloc] initWithFrame:CGRectMake(0, 0, width, height)];
            myTextField.borderStyle = UITextBorderStyleRoundedRect;
            myTextField.font = [UIFont systemFontOfSize:15];
            //NSString *textFieldTag = [NSString stringWithFormat:@"%@", tagValue];
            //NSString *textFieldTag = myTextField.text;
            NSInteger b = [intTag integerValue];
            myTextField.tag = b;
            NSLog(@" Textfield tag:%ld",(long)myTextField.tag);
            myTextField.keyboardType = UIKeyboardTypeDefault;
            myTextField.returnKeyType = UIReturnKeyDone;
            myTextField.contentVerticalAlignment = UIControlContentVerticalAlignmentCenter;
            //[layout addSubview:myTextField];
            [layout addArrangedSubview:myTextField];


            NSNumber *tagNumber = [NSNumber numberWithInteger:b];
            [arrayOfTagValue addObject:tagNumber];
            NSLog(@" tag values :%@",arrayOfTagValue);

            NSDictionary *bindings3 = NSDictionaryOfVariableBindings(layout, myTextField);

            // Set the constraints for the label to be pinned equally with padding
            [greyView addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:@"V:|-(30)-[myTextField]-(30)-|" options:NSLayoutFormatDirectionLeadingToTrailing metrics:nil views:bindings3]];
            [greyView addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:@"H:|-(30)-[myTextField]-(30)-|" options:NSLayoutFormatDirectionLeadingToTrailing metrics:nil views:bindings3]];
        }

下面是我需要获取每个文本值但无法实现的代码。怎么做？

-(void) sendBridge:(UITextField *)textField{

    for(int i = 0; i< [arrayOfTagValue count]; i++){

        NSLog(@"Value :%@",[arrayOfTagValue objectAtIndex:i]);

        if(textField == myTextField) {

            myTextField.textColor = [UIColor redColor];
            NSLog(@" text :%@",myTextField.text);
        }
    }

}

Answer 1

请使用这个：-

UITextField *txt = (UITextField*)[self.view viewWithTag:0]; 
NSString *strValue = txt.text;

Answer 2

这是一个例子：

在你的 viewcontroller.h 中

@interface UIViewController : UIViewController<UITextFieldDelegate> {

 UITextField * listTitle;

}

在您的 viewController.m 中：

listTitle = (UITextField*)[self.view viewWithTag:10];
        listTitle.userInteractionEnabled=NO;
        listTitle.delegate = self;
        listTitle.textAlignment=NSTextAlignmentCenter;
        listTitle.font =[UIFont fontWithName:@"Lato-Bold" size:14];
        listTitle.textColor =[UIColor colorWithRed:45/255.0f green:45/255.0f blue:54/255.0f alpha:1];
        listTitle.text=@"";


NOW you can use delegate methods:

-(void)textFieldDidEndEditing:(UITextField *)textField {

    if(textField == listTitle) { //or textField.tag == 10
       //here you know the user is using your textfield listTitle 

    }
}

-(void) textFieldDidBeginEditing:(UITextField *)textField {

    if(textField == listTitle) {
       //here you know the user is using your textfield listTitle 
       listTitle.textcolor = [UIColor redColor];
       listTitle.text = @"Hello";
    }

}

希望对你有帮助

Answer 3

您可以将 TextFields 添加到

中，而不是使用标签

IBOutletCollection 并像那样引用它们。这样，您可以遍历包含 TextField 的 IBOutletCollection 数组并获取值。

这比标签安全得多，因为它不太容易出现用户错误。

示例：

#import "ViewController.h"

@interface ViewController ()

@property (strong, nonatomic) IBOutletCollection(UITextField) NSArray *TextFieldsCollection;


@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.

    for (UITextField *textField in self.TextFieldsCollection) {
        NSLog(@"Placeholder: %@", textField.placeholder);
        NSLog(@"Text: %@", textField.text);
    }
}

@end

Answer 4

如果您使用的是 UIStackview，您可以这样做：

 for (UITextField *txtField in [stackview subviews]) {

            if (txtField.tag == 1) {
                //...
            } else {
                //...
            }   
 }

乔治回答得很好！