Ios Cmd+click方法指向不同的ViewController

我有两个视图控制器。在这两种方法中，我都实现了-void textField didbeginediting:UITextField*textField方法。但是，当我CMD+单击第二个ViewController中的方法时，它看起来是指第一个ViewController而不是委托。参考图片

出什么事了

代码如下

 -(void) textFieldDidBeginEditing:(UITextField *)textField
 {
NSLog(@"in text edit %@ ",textField.text);
// UITableViewCell *cell = (UITableViewCell*) [[[textField superview]superview] superview];

CGPoint buttonPosition = [textField convertPoint:CGPointZero toView:table2];
NSIndexPath *indexPath = [table2 indexPathForRowAtPoint:buttonPosition];
UITableViewCell *cell = (UITableViewCell*)[table2 cellForRowAtIndexPath:indexPath];

UIStepper *st = (UIStepper *)[(UITableViewCell *) textField.superview viewWithTag:123];
NSString *txt=[[NSString alloc]init];
txt=textField.text;
NSLog(@"val is: %@",txt);

[st setValue:textField.text.doubleValue];

//// NSIndexPath *indexPath=[table2 indexPathForCell:cell];
[self updateStepper:st fromTetabxtField:textField];


NSInteger selectedSegment = segmentControl.selectedSegmentIndex;



if(selectedSegment == 2){
    [pobQuantity replaceObjectAtIndex:indexPath.row withObject:[NSNumber numberWithInt:txt.intValue]];

    textField.text=[NSString stringWithFormat:@"%d",[[pobQuantity objectAtIndex:indexPath.row]intValue]];

    NSLog(@"pob  at Index %d is %@",indexPath.row,[pobQuantity objectAtIndex:indexPath.row]);
}

if(selectedSegment == 3){
    [brandRemindersQuantity replaceObjectAtIndex:indexPath.row withObject:[NSNumber numberWithInt:txt.intValue]];

    textField.text=[NSString stringWithFormat:@"%d",[[brandRemindersQuantity objectAtIndex:indexPath.row]intValue]];
    NSLog(@"brand  at Index %d is %@",indexPath.row,[brandRemindersQuantity objectAtIndex:indexPath.row]);
}


}

在CellforRowAtIndexPath方法中设置UItextField委托

        UITextField *lbl1 = [[UITextField alloc] init];
        lbl1.frame = CGRectMake(400, 16, 35 ,15);
        [lbl1 setBackgroundColor:[UIColor clearColor]];
        lbl1.text = @"1";
        lbl1.delegate=self;
        [lbl1 setKeyboardType:UIKeyboardTypeNumberPad];
        [lbl1 setTag:456];
        [cell.contentView addSubview:lbl1];

在代码中

lbl1.代表=自我

若委托应该表示类而不是它本身，那个么它的值是错误的。应将其设置为其他某个委托类：

lbl1.delegate=_delegateClass

这里：_delegateClass表示除自身之外的其他类

例如：psuedocode

.h文件：

@interface ViewController1 : UIViewController

@end

@interface ViewController2 : UIViewController
{
    // declare textfield here
}
@property id _delegate;
@end

.m文件：

@interface ViewController1 ()

@end

@implementation ViewController1

- (void)viewDidLoad
{
      // initialize view controller here
      // set _delegate to self
}

@end

@interface ViewController2 ()

@end

@implementation ViewController2
@synthesize _delegate

...
...   // Here set : textfield.delegate = _delegate; // now it refers to viewController1 and all event of textfield will be handle in ViewController1
...
@end

.h文件：

@interface ViewController1 : UIViewController

@end

@interface ViewController2 : UIViewController
{
    // declare textfield here
}
@property id _delegate;
@end

.m文件：

@interface ViewController1 ()

@end

@implementation ViewController1

- (void)viewDidLoad
{
      // initialize view controller here
      // set _delegate to self
}

@end

@interface ViewController2 ()

@end

@implementation ViewController2
@synthesize _delegate

...
...   // Here set : textfield.delegate = _delegate; // now it refers to viewController1 and all event of textfield will be handle in ViewController1
...
@end

我现在尽可能多地描述/详细

---

快乐编码

我猜在一个控制器中，你做了cmd+点击，所以它指的是剩下的一个。是的。。。。但问题是。。。为什么？此功能选择此签名的可用位置，单击后跳转到相应的类。因此，没有必要跳到同一个类上，因为您已经找到了它。实际上，我并不是在谈论这个特性。发生的事情是，在执行该委托之后，另一个类的viewDidLoad方法将被执行。然后检查委托的值，它在运行时引用了正确的类吗？您演示的方式无助于找到执行时类出错的原因。使用NSLogto打印或放置断点和调试窗口try:po delegate或print delegate在运行时查看实际的类绑定。