有OC版本和swift版本：

For OC: ... XFetchCodeButton * button = [[XFetchCodeButton alloc] initWithFrame:CGRectMake(20, 100, 100, 50)]; button.backgroundColor = [UIColor blackColor]; [self.view addSubview:button];

[button doneSend:^{
    NSLog(@"button click");
}];

button2.backgroundColor = [UIColor purpleColor];
button2.disabledColor = [UIColor whiteColor];
button2.normalTitle = @"Fetch Code";
button2.normalTintColor = [UIColor grayColor];
[button2 addTarget:self action:@selector(send) forEvents:UIControlEventTouchUpInside];
[self.view addSubview:button2];
...
- (void)send {
  NSLog(@"button2 click");
}

For Swift: ... let codeButton = XFetchCodeButton(frame: CGRect(x: 20, y: 100, width: 100, height: 50)) codeButton.backgroundColor = .black codeButton.normalTitle = "Fetch Code" codeButton.normalTintColor = UIColor.white self.view.addSubview(codeButton)

    codeButton.doneSend {
        print("codeButton 已发送")
    }
    
    let codeButton2 = XFetchCodeButton(frame: CGRect(x: 20, y: 200, width: 100, height: 50))
    codeButton2.backgroundColor = .purple
    codeButton2.disabledColor = .black
    codeButton2.normalTintColor = .white
    self.view.addSubview(codeButton2)
    codeButton2.addTarget(target: self, action: #selector(code), forEvents: .touchUpInside)
    ...

@objc func code() {
    print("codeButton2 已发送")
}