iOS : Radio Button Programatically Without using any Image

Question

我一直致力于创建自定义 ui 控件，并想知道如何以编程方式将单选按钮添加到 UIView。

我只找到了一种解决方案，但它适用于 mac osx 应用程序控制。
所需结果的图像如下所示。


限制
不想使用图像。

谢谢。

Answer 1

单选按钮 - 如下设置角半径和板颜色。取三个按钮ViewController.h文件

@property(nonatomic,retain) IBOutlet UIButton *btn1;
@property(nonatomic,retain) IBOutlet UIButton *btn2;
@property(nonatomic,retain) IBOutlet UIButton *btn3;

- (IBAction)ClickBtn1:(id)sender;
- (IBAction)ClickBtn2:(id)sender;
- (IBAction)ClickBtn3:(id)sender;

在 ViewDidLoad方法。

- (void)viewDidLoad
{
    [super viewDidLoad];

    self.btn1.layer.cornerRadius = 10;
    self.btn1.layer.borderColor = [[UIColor blackColor] CGColor];

    self.btn2.layer.cornerRadius = 10;
    self.btn2.layer.borderColor = [[UIColor blackColor] CGColor];

    self.btn3.layer.cornerRadius = 10;
    self.btn3.layer.borderColor = [[UIColor blackColor] CGColor];

    // default

    [self.btn1 setTitle:@"." forState:UIControlStateNormal];
    [self.btn2 setTitle:@"" forState:UIControlStateNormal];
    [self.btn3 setTitle:@"" forState:UIControlStateNormal];

}

按钮单击时的操作。

- (IBAction)ClickBtn1:(id)sender
{
    [self.btn1 setTitle:@"." forState:UIControlStateNormal];
    [self.btn2 setTitle:@"" forState:UIControlStateNormal];
    [self.btn3 setTitle:@"" forState:UIControlStateNormal];
}
- (IBAction)ClickBtn2:(id)sender
{
    [self.btn2 setTitle:@"." forState:UIControlStateNormal];
    [self.btn1 setTitle:@"" forState:UIControlStateNormal];
    [self.btn3 setTitle:@"" forState:UIControlStateNormal];
}
- (IBAction)ClickBtn3:(id)sender
{
    [self.btn3 setTitle:@"." forState:UIControlStateNormal];
    [self.btn1 setTitle:@"" forState:UIControlStateNormal];
    [self.btn2 setTitle:@"" forState:UIControlStateNormal];
}

在您的 StoryBoard 按钮 View 中设置为以下高度和宽度 (20,20)的按钮。取标题名称点 (.) 及其字体大小 System 44.0并将边缘设置为下图。



您的单选按钮是: