iOS 点击按钮实现复制

1、新建一个UIButton

    UIButton *btn = [[UIButton alloc]initWithFrame:CGRectMake(0, 0, 40, 40)];
    [btn setTitle:@"click me" forState:UIControlStateNormal];
    [btn addTarget:self action:@selector(btnClick:) forControlEvents:UIControlEventTouchUpInside];

2、创建uibutton的点击事件btnClick

-(void)btnClick:(id)sender{
    UIPasteboard *copy = [UIPasteboard generalPasteboard];
    [copy setString:scannerPassWord];
    if (copy == nil || [scannerPassWord isEqualToString:@""]==YES) 		{    [MBProgressHUD showError:@"copy Fail" toView:self.view ];
    }else{
        [MBProgressHUD showSuccess:@"copy Success" toView:self.view];
    }
}