Ios 复选框与图像有关的问题

当再次选中复选框时，它会再次显示选中的图像。请帮助

- (IBAction)CheckBox:(id)sender {
    if ((CheckBox.selected==NO)
    {
        [CheckBox setBackgroundImage:[UIImage imageNamed:@"checked_checkbox.png"] forState:UIControlStateNormal];
        CheckBox.selected = YES;
    }
    else
    {
       [CheckBox setBackgroundImage:[UIImage imageNamed:@"uncheck_checkbox.png"] forState:UIControlStateSelected];
       CheckBox.selected =NO;
    }
}

---

您必须将状态设置为“正常”和“选定”

- (IBAction)CheckBox:(id)sender {
    if ((CheckBox.selected==NO)
    {
        [CheckBox setBackgroundImage:[UIImage imageNamed:@"checked_checkbox.png"] forState:UIControlStateNormal];
        [CheckBox setBackgroundImage:[UIImage imageNamed:@"uncheck_checkbox.png"] forState:UIControlStateSelected];
    }
    else
    {
       [CheckBox setBackgroundImage:[UIImage imageNamed:@"checked_checkbox.png"] forState:UIControlStateSelected];
       [CheckBox setBackgroundImage:[UIImage imageNamed:@"uncheck_checkbox.png"] forState:UIControlStateNormal];
    }
}

您需要编辑代码以：

- (IBAction)CheckBox:(id)sender 
{
   [CheckBox setBackgroundImage:[UIImage imageNamed:@"uncheck_checkbox.png"] forState:UIControlStateSelected];
    [CheckBox setBackgroundImage:[UIImage imageNamed:@"checked_checkbox.png"] forState:UIControlStateNormal];
    if ((CheckBox.selected==NO)
    {
         CheckBox.selected = YES;
    }
    else
    {
         CheckBox.selected =NO;
    } 
}

您最好设置：

[CheckBox setBackgroundImage:[UIImage imageNamed:@"uncheck_checkbox.png"] forState:UIControlStateSelected];
[CheckBox setBackgroundImage:[UIImage imageNamed:@"checked_checkbox.png"] forState:UIControlStateNormal];

---

在函数configUI或viewDidLoad中，或在xib…

中，可以设置此方法的断点，然后再次运行。让我们看看它是否在两种情况下都运行。

[CheckBox setBackgroundImage:[UIImage imageNamed:@"uncheck_checkbox.png"] forState:UIControlStateSelected];
[CheckBox setBackgroundImage:[UIImage imageNamed:@"checked_checkbox.png"] forState:UIControlStateNormal];