Question

我想动态创建uibuttons。所以我循环创建带标签的按钮并添加到视图中。所有按钮对其标签值执行相同的操作...但我想更改按钮的属性。因此我需要使用标签值来获取uibutton ...

我的代码......

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…
}

Answer 1

使用viewWithTag的{{1}}功能，使用标记值访问UIView。

请参阅文档viewWithTag

使用如下。

UIButton

Answer 2

-(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…      
    if ([sender isKindOfClass:[UIButton class]])
    {
        UIButton *temp=(UIButton*)sender;

        if ([temp tag]==1 || [temp tag]==3 || [temp tag]==6 || [temp tag]==7 )
        {
            [temp setBackgroundColor:[UIColor redColor]];
        }
    }
}

Answer 3

检查此代码

    - (void)viewDidLoad
{
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.
    int y = 100;
    for (int i=0; i<=5; i++) {
        UIButton *button = [UIButton buttonWithType:UIButtonTypeRoundedRect];
        [button addTarget:self 
                   action:@selector(aMethod:)
         forControlEvents:UIControlEventTouchDown];
        [button setTitle:@"Show View" forState:UIControlStateNormal];
        button.frame = CGRectMake(80, y, 160, 40);
        [button setTitle:[NSString stringWithFormat:@"Button-%i", i] forState:UIControlStateNormal];
//        [button set

        [self.view addSubview:button];
        y=y+60;
    }
}

-(void)aMethod:(id)sender{
    UIButton *button = sender;
    int y = 100;
    int i = 5;

    for (int x=0; x<=i; x++) {
        NSString *frameString = [NSString stringWithFormat:@"{{80, %i}, {160, 40}}", y];
        if ([NSStringFromCGRect(button.frame) isEqualToString:frameString])  {
            NSLog(@"button %i clicked..", x);
        }
    y= y+60;
    } 
}

如何创建动态按钮iphone xcode？

3 个答案: