iphone - 如何更改按钮上的图像集

Question

我想更改按钮单击事件上的按钮图像。这就是我正在尝试的。

-(IBAction)editObjectImage:(id)sender
{
    if (editButtonState == NO)
    {   
        [editButton setImage:nil forState:UIControlStateNormal];
        [editButton setImage:[UIImage imageNamed:@"done2.png"] forState:UIControlStateNormal];
    }
    else
    {
        [editButton setImage:nil forState:UIControlStateNormal];
        [editButton setImage:[UIImage imageNamed:@"edit.png"] forState:UIControlStateNormal];
    }
}

但是我的 Button 图像没有改变。代码有什么问题？

Answer 1

我认为您没有时间更改 editButtonState。您的代码可以简化为。

-(IBAction)editObjectImage:(id)sender
{
    UIButton *theButton = (UIButton*)sender;
    if (editButtonState == NO) {   
        [theButton setImage:[UIImage imageNamed:@"done2.png"] forState:UIControlStateNormal];
    } else {
        [theButton setImage:[UIImage imageNamed:@"edit.png"] forState:UIControlStateNormal];
    }

    editButtonState = !editButtonState;
}