iphone - 同时输入两个uitextfield

Question

我想同时输入两个uitextfield，这可能吗？

Answer 1

您可以使用以下代码来完成:

Typein2.h - 声明了三个文本字段的类。 “textFieldBeingEdited”textField 是知道正在编辑哪个textField(text1 或text2)

#import <UIKit/UIKit.h>

@interface Typein2 : UIViewController <UITextFieldDelegate> {

    UITextField *text1;
    UITextField *text2;

    UITextField *textFieldBeingEdited;

}

@property (nonatomic, retain) IBOutlet UITextField *text1;
@property (nonatomic, retain) IBOutlet UITextField *text2;

@end

在 viewDidLoad 方法中执行以下操作:

- (void)viewDidLoad
{
    [super viewDidLoad];

    text1.delegate = self;
    text2.delegate = self;

    [[NSNotificationCenter defaultCenter]
     addObserver:self
     selector:@selector(changeBothFieldsText:)
     name:UITextFieldTextDidChangeNotification
     object:nil ] ;
}

TextField 委托(delegate)方法:

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

    if ( [textField isEqual:text1] ) {
        textFieldBeingEdited = text1;
    }
    else
        textFieldBeingEdited = text2;

}

changeBothFieldsText 方法:

-(void)changeBothFieldsText:(NSNotification*)notification {

    if ( [textFieldBeingEdited isEqual:text1] ) {
        text2.text = text1.text;
    }
    else
        text1.text = text2.text;    
}