为什么我的UIButton不响应触摸？ [英] Why isn't my UIButton responding to touches?

问题描述

我相信我会忽略这个明显的，因为我有无数的工作按钮...但是...无论什么原因，这个不合作...

I'm sure I'm overlooking the obvious as I've got countless working buttons...but...for whatever reason this one is not cooperating...

我已向 UIView 子类（DialogView）中添加了一个 UIButton 我的视图控制器视图的子视图。这个子视图几乎完全在IB中创建。我将IB中的（IBAction）okButtonPressed：（id）sender 连接到 Touch Up Inside ，并在DialogView中创建了相应的方法。然而，当我触摸这个按钮，它不触发的方法。 userInteractionEnabled 为 true 的VC视图， DialogView 和< > UIButton 。

I've added a UIButton (Rounded Rect) to a UIView subclass (DialogView) which is a subview of my view controller's view. This subview is created almost entirely in IB. I've wired up the button to (IBAction)okButtonPressed:(id)sender in IB to Touch Up Inside and created a corresponding method in DialogView. However when I "touch" this button it doesn't trigger the method. userInteractionEnabled is true for the VC's view, DialogView and the UIButton.

思考也许 initWithCoder 不得不做一些框架操作添加以下成功日志到控制台。

Thinking maybe initWithCoder had to do some frame manipulation or something I added the following which successfully logs to console.

- (id)initWithCoder:(NSCoder *)decoder {
    if (self = [super initWithCoder:decoder]) {
        NSLog(@"DialogView initWithCoder called");
    }
    return self;
}

在进一步探索中，我连接了一个 IBOutlet 到按钮，然后如果我尝试更改titleLabel从视图控制器，我注意到它被严重截断。当第一次绘制视图时，在IB中设置的默认文本按我！设置很好。但是如果我改变文本...

In further exploration I wired up an IBOutlet to the button and then if I try to change the titleLabel from the view controller I notice that it get's severely truncated. Default text of say "Press Me!" set in IB displays fine when view is first drawn. But if I change the text...

self.DialogView.okButton.titleLabel.text = @"Not Working";

...被截断为N ...

...it gets truncated to "N..."

Dunno如果这是相关的。可能...

Dunno if this is related. Probably...

任何人都看到我在这里搞砸了吗？

Anyone see what I've screwed up here?

显示 UIButton ）：

从视图控制器：

self.DialogView = [[[NSBundle mainBundle] loadNibNamed:@"DialogView" owner:self options:nil] objectAtIndex:0];; 
self.DialogView.myVC = self;
self.DialogView.backgroundColor = [UIColor clearColor];
self.DialogView.center = CGPointMake(self.view.frame.size.width / 2, self.view.frame.size.height / 2);
self.DialogView.nameLabel.text = loan.fullName;
self.DialogView.noteLabel.text = loan.summaryOfLoan;
self.DialogView.amountLabel.text = [currencyFormatter stringFromNumber:loan.originalAmount];
self.DialogView.alpha = 0.0;
[self.view addSubview:DialogView];

UILabels都显示为预期。正如问题 UIButton 。

The UILabels all displaying as expected. As is the problem UIButton. I can see it I just can't interact with it!?!

DialogView的界面：

@class MyViewController;

@interface DialogView : UIView {
    IBOutlet UILabel *nameLabel, *noteLabel, *amountLabel;
    IBOutlet UIImageView *arrowView;
    IBOutlet UIButton *okButton;
    MyViewController *myVC;
}

@property (nonatomic, retain) UILabel *nameLabel, *noteLabel, *amountLabel;
@property (nonatomic, retain) UIImageView *arrowView;
@property (nonatomic, assign) MyViewController *myVC;
@property (nonatomic, retain) UIButton *okButton;

- (IBAction)okButtonPressed:(id)sender;

@end

DialogView的实现

#import "DialogView.h"
#import "MyViewController.h"

@implementation DialogView

@synthesize nameLabel, noteLabel, amountLabel, arrowView, okButton;
@synthesize myVC;

- (void)dealloc {
    [nameLabel release];
    [noteLabel release];
    [amountLabel release];
    [arrowView release];
    [okButton release];
    [super dealloc];
}

- (id)initWithFrame:(CGRect)frame {
    if (self = [super initWithFrame:frame]) {
        // Initialization code
    }
    return self;
}

- (id)initWithCoder:(NSCoder *)decoder {
    if (self = [super initWithCoder:decoder]) {
        NSLog(@"DialogView initWithCoder called");
    }
    return self;
}

- (IBAction)okButtonPressed:(id)sender {
    NSLog(@"pressed DialogView OK button");
    [self.myVC.navigationController popViewControllerAnimated:YES];
}

- (void)drawRect:(CGRect)rect {
    // Drawing code
}


@end

推荐答案

我认为我们应该使用-setTitle：forState ：为了设置按钮的标题？

I thought that we should use -setTitle:forState: in order to set button's title ?

另一个想法，你检查按钮的框架不是CGRectZero？顺便说一下，在层次结构中视图的所有帧？并检查层次结构中的一个超级视图是否禁用用户交互？
而且，我认为imageView没有响应touch，你有一个在你的代码？

An other thought, did you check that the button's frame is not CGRectZero ? And by the way, all the frames for the view in the hierarchy ? And check that one superview in the hierarchy is not user interaction disabled ? And, I think imageView does not respond to touches, do you have one in your code ?

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