Question

我想以编程方式创建3-4个按钮，但是使用自定义类和特定值/密钥对，但我在如何准确地完成此操作方面很困难。我想要创建的按钮必须有一个名为“AnswerButton”的自定义类。添加UIButton.tag不应该是一个问题，所以我可以准确地告诉你点击了哪个按钮，对吗？

以下是我用来创建按钮的代码：

NSMutableArray *catNames;
catNames = [NSMutableArray arrayWithCapacity:5];
[catNames addObject:@"Boote"];
[catNames addObject:@"Gewässer"];
[catNames addObject:@"Technik"];
[catNames addObject:@"Krims Krams"];

[self dynamiclyCreateButtons:4 :catNames];

- (void)dynamiclyCreateButtons:(int)howMany :(NSMutableArray*)catNames {
    float standard_btnHeight = 30.0;
    float standard_btnWidth = 200.0;
    CGFloat p = 120;

    for(int i = 0; i != howMany; i++){
        UIButton *catBtn = [UIButton buttonWithType:UIButtonTypeRoundedRect];
        [catBtn setFrame:CGRectMake(0.0f, 0.0f, standard_btnWidth, standard_btnHeight)];
        [catBtn setCenter:CGPointMake(100.0f, p)];
        [catBtn setTitle:[catNames objectAtIndex:i] forState:UIControlStateNormal];
        [catBtn addTarget:self action:@selector(buttonClicked:) forControlEvents:UIControlEventTouchUpInside];
        [self.view addSubview:catBtn];
        p=p+40;
        catBtn = nil;
    }
}

//编辑我的意思是自定义类： https://i.stack.imgur.com/8r2oz.png

//编辑2（正确的答案，因为我无法自己发布答案以更好地指出答案）

就在这里指出并更容易找到答案：Greg的回答是正确的。您不应该使用默认类创建按钮，而应使用自定义类：

替换

UIButton *catBtn = [UIButton buttonWithType:UIButtonTypeRoundedRect];

带

AnswerButton *catBtn = [AnswerButton buttonWithType:UIButtonTypeRoundedRect];

别忘了导入课程！

Answer 1

试试这个...

-(void)dynamiclyCreateButtons:(int)howMany :(NSMutableArray*)catNames {
    float standard_btnHeight = 30.0;
    float standard_btnWidth = 200.0;
    CGFloat p = 120;


    for(int i = 0; i != howMany; i++){
        UIButton *catBtn = [UIButton buttonWithType:UIButtonTypeRoundedRect];
        [catBtn setFrame:CGRectMake(0.0f, 0.0f, standard_btnWidth, standard_btnHeight)];
        [catBtn setCenter:CGPointMake(100.0f, p)];
        [catBtn setTag:i];
        [catBtn setTitle:[catNames objectAtIndex:i] forState:UIControlStateNormal];
        [catBtn addTarget:self action:@selector(buttonClicked:) forControlEvents:UIControlEventTouchUpInside];
        [self.view addSubview:catBtn];
        p=p+40;
        catBtn = nil;
    }
}
- (IBAction)buttonClicked:(id)sender
{
    NSLog(@"Button.Tag = %d",[sender tag]);
}

编辑：如果要使用自定义类，则必须创建一个继承自UIButton的类。然后在视图控制器中导入此类。

之后将UIButton替换为YourCustomButton，如..

YourCustomButton *catBtn = [YourCustomButton buttonWithType:UIButtonTypeRoundedRect];

使用自定义类以编程方式创建UIButton

1 个答案: