iPhone:setTitle:在onCreate中工作,但不在我的方法中

问题描述 投票:0回答:1

我想通过改变测试来制作一个可在两个不同阶段之间翻转的按钮。所以如果它说添加,你点击我更改删除。如果它说删除它将改为添加。

该程序不起作用,尝试调试它,我把setTitle方法放在oncreate上,它在那里工作。接下来,我在我的方法中设置断点。它检测到它说添加,并执行了假设改变文本的行,文本没有改变。我真的不明白为什么它适用于oncreate方法而不是我的方法。

- (void)viewDidLoad
{
    [super viewDidLoad];
    // Do any additional setup after loading the view from its nib.
    mFeetImage.contentMode = UIViewContentModeScaleAspectFit;

    [gFileName Reset];
    NSString *ted= [gFileName GetFileName];
    mFeetImage.image= [ UIImage imageNamed :ted];

    // test code
    [ mFavrest setTitle: @"ADD" forState:UIControlStateNormal ];  works
}

-(IBAction) aFavest: (id) sender
{
    NSString *t=mFavrest.currentTitle;
    int i=[ t compare:@"ADD" ];

    if ( i ==0 )
    {
        // set break point here, break point goes off text does not change
        [ mFavrest setTitle: @"REMOVE" forState:UIControlStateNormal ];
    }
    else
    {
        [ mFavrest setTitle: @"ADD" forState:UIControlStateNormal];
    }
}
iphone ios
1个回答
0
投票

请尝试以下代码:

-(IBAction) aFavest: (id) sender
{
    UIButton *youButton = (UIButton*)sender;
    if ([youButton.currentTitle isEqualToString:@"ADD"])
    {
        // set break point here, break point goes off text does not chnage
        [youButton setTitle: @"REMOVE" forState:UIControlStateNormal ];
    }
    else
    {
        [youButton setTitle: @"ADD" forState:UIControlStateNormal];
    }
}

另外,确保变量mFavrest正确连接。在某处放置一个断点并检查它是否为零。

如果IBOutlet mFavrest正确连接并且IBAction也是如此,则此代码应该有效。

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