Question

我在一个视图控制器上有多个文本字段。我的.m和.h在下面。我是Xcode和Objective-C的新手，所以如果这只是一个愚蠢的错误，请好心。

·H：

    #import <UIKit/UIKit.h>

@interface MainUI : UIViewController

@property (weak, nonatomic) IBOutlet UITextField *letters;

@property (weak, nonatomic) IBOutlet UISegmentedControl *par;

@property (weak, nonatomic) IBOutlet UISegmentedControl *basicSym;

@property (weak, nonatomic) IBOutlet UITextField *numLetters;

@property (weak, nonatomic) IBOutlet UIButton *mainBack;

@property (weak, nonatomic) IBOutlet UIButton *mainNext;

@end

的.m：

#import "MainUI.h"

@interface MainUI ()

@end

@implementation MainUI

- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
    self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
    if (self) {
        // Custom initialization
    }
    return self;
}

- (void)viewDidLoad
{
    [super viewDidLoad];
    // Do any additional setup after loading the view.
}

- (void)didReceiveMemoryWarning
{
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

- (BOOL)textFieldShouldReturn: (UITextField*)theTextField {
    if (theTextField == self.textField) {
        [theTextField resignFirstResponder];
    }
    return YES;
}
@end

错误发生在if (theTextField == self.textField) {帮助吗？

Answer 1

如果你只是试图让键盘在光标在文本字段中时按下Return键时消失，这应该就足够了：

- (BOOL)textFieldShouldReturn: (UITextField*)theTextField {
    [theTextField resignFirstResponder];
    return YES;
}

在'MainUI *'类型的对象上找不到“属性'textField'”

1 个答案: