如何在 iOS 中创建一个简单的复选框? [英] How to create a simple checkbox in iOS?

问题描述

可能的重复:
iPhone 应用程序中的复选框

我想创建一个包含 2 个值的简单复选框并保存它，我该怎么做?

I want to create a simple checkbox with 2 values and save this, how can I make that?

谢谢.

推荐答案

是的，iOS 中没有适合您的复选框 (-:

Yeah, no checkbox for you in iOS (-:

在这里，这是我创建复选框的操作:

Here, this is what I did to create a checkbox:

UIButton *checkbox;
BOOL checkBoxSelected;
checkbox = [[UIButton alloc] initWithFrame:CGRectMake(x,y,20,20)];
// 20x20 is the size of the checkbox that you want
// create 2 images sizes 20x20 , one empty square and
// another of the same square with the checkmark in it
// Create 2 UIImages with these new images, then:

[checkbox setBackgroundImage:[UIImage imageNamed:@"notselectedcheckbox.png"]
                    forState:UIControlStateNormal];
[checkbox setBackgroundImage:[UIImage imageNamed:@"selectedcheckbox.png"]
                    forState:UIControlStateSelected];
[checkbox setBackgroundImage:[UIImage imageNamed:@"selectedcheckbox.png"]
                    forState:UIControlStateHighlighted];
checkbox.adjustsImageWhenHighlighted=YES;
[checkbox addTarget:(nullable id) action:(nonnull SEL) forControlEvents:(UIControlEvents)];
[self.view addSubview:checkbox];

现在在目标方法中执行以下操作:

Now in the target method do the following:

-(void)checkboxSelected:(id)sender
{
    checkBoxSelected = !checkBoxSelected; /* Toggle */
    [checkbox setSelected:checkBoxSelected];
}

就是这样！

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