如何创建动态按钮iphone X code吗？ [英] how to creating dynamic buttons iphone xcode?

问题描述

我要动态地创建uibuttons。所以我对循环用标签创建按钮，并添加到浏览。
所有按钮执行相对于它的标记值同样的动作......但我想更改按钮的属性格式。因此，我需要使用标签值来得到的UIButton ...

我的code ...

 的UIButton *按钮2;
//观点做负载
INT宽度= 30;的for（int i = 1; I＆LT; = 5;我++）
{
    按钮2 = [UIButton的buttonWithType：UIButtonTypeCustom];
    [按钮2 addTarget：自我行动：@选择（ratingAction :) forControlEvents：UIControlEventTouchUpInside];
    [按钮2了setBackgroundImage：[UIImage的imageNamed：@star1.png] forState：UIControlStateNormal];
    button2.tag = I;
    button2.backgroundColor =的UIColor clearColor]
    button2.frame = CGRectMake（宽度，78，15，15）;    [self.view addSubview：按钮2];    宽度=宽度+30;
} - （无效）ratingAction：（ID *）发件人
{
    //这里使用的标记值我想要得到的按钮，更改背景图片...。
    //例如我想改变的背景标记值1,3,6,7，8 ...
}
 

解决方案

的UIView 的

使用 viewWithTag 函数访问你的的UIButton 使用变量值。

查看文档<一个href=\"http://developer.apple.com/library/ios/#documentation/uikit/reference/uiview_class/uiview/uiview.html#//apple_ref/occ/instm/UIView/viewWithTag%3a\"相对=nofollow> viewWithTag

如下使用它。

 的UIButton *则myButton =（UIButton的*）[mySuperView viewWithTag：1];
*的UIButton = myButton的（的UIButton *）[mySuperView viewWithTag：3];
*的UIButton = myButton的（的UIButton *）[mySuperView viewWithTag：6];
.........
 

I want to create uibuttons dynamically. so i for loop to create button with tag and added to view. all buttons performs the same action with respect to its tag value... but i want to change the propery of the button. Therefore i need to get the uibutton using the tag value...

my code...

UIButton *button2;
//view did load
int width = 30;

for(int i = 1; i <= 5; i++)
{
    button2 = [UIButton buttonWithType:UIButtonTypeCustom];
    [button2 addTarget:self action:@selector(ratingAction:) forControlEvents:UIControlEventTouchUpInside];
    [button2 setBackgroundImage:[UIImage imageNamed:@"star1.png"] forState:UIControlStateNormal];
    button2.tag = i;
    button2.backgroundColor = [UIColor clearColor];
    button2.frame = CGRectMake(width, 78, 15, 15);

    [self.view addSubview:button2];

    width = width +30;
}

-(void)ratingAction:(id*)sender
{
    // here using the tag value i want to get the button and change the background image….
    // for example i want to change the background for tag values 1,3,6,7 ,8…
}

解决方案

Use viewWithTag function of UIView to access your UIButton using the tag value.

See in Documentation viewWithTag

Use it as below.

UIButton* myButton = (UIButton*)[mySuperView viewWithTag:1];
UIButton* myButton = (UIButton*)[mySuperView viewWithTag:3];
UIButton* myButton = (UIButton*)[mySuperView viewWithTag:6];
.........

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