iphone - 以编程方式添加 uibutton

Question

这里有我正在尝试的代码openingHoursView.ohLocation 有两个值“value1”和“value2”。openingHoursView.idNum 的值“id1”和“id2”也是如此。当我执行代码时，我只得到一个名为“value2”和“id2”的按钮。所以我的问题是如何为 openingHoursView.ohLocation 和 openingHoursView.idNum

的值创建所有按钮

- (void)loadView {

    storeAppDelegate = (StoreAppDelegate *)[[UIApplication sharedApplication] delegate];    

    int row = [storeAppDelegate.openingHoursLocationsDelegate count]-1;
    for (int i = 0; i <= row; i++) {
        openingHoursView = [storeAppDelegate.openingHoursLocationsDelegate objectAtIndex:i];

        self.view = [[UIView alloc] initWithFrame:[[UIScreen mainScreen] applicationFrame]];

        self.view.backgroundColor = [UIColor whiteColor];

        //create the button
        UIButton *button = [UIButton buttonWithType:UIButtonTypeRoundedRect];
        //set the position of the button
        if (i%2 != 0) {
            button.frame = CGRectMake(30 , 100 , 150, 30);

        }else {
            button.frame = CGRectMake(30 , 100 + i*50, 150, 30);
        }


        //set the button's title
        [button setTitle:openingHoursView.ohLocation forState:UIControlStateNormal];

        //listen for clicks
        [button addTarget:self action:@selector(buttonPressed:) forControlEvents:UIControlEventTouchUpInside];
        button.tag = [openingHoursView.idNum intValue];
        //add the button to the view
        [self.view addSubview:button];
    }
}

-(IBAction) buttonPressed: (id) sender {
    UIButton* button = (UIButton*)sender;

    NSLog(@"User clicked %d", button.tag);
    // Do something here with the variable 'sender'
}

只是一个解释，openingHoursView.ohLocation 的 objectAtIndex:0 是“value1”，objectAtIndex:1 的解释是“value2”。打开HoursView.idNum 的过程相同

Answer 1

问题是你正在做:

self.view = [[UIView alloc] initWithFrame:[[UIScreen mainScreen] applicationFrame]];

self.view.backgroundColor = [UIColor whiteColor];

在for循环内，因此在每次迭代时都会被覆盖。您应该只在 for 循环之前执行一次。