Question

我是iOS的新手。

我正在使用以下代码向控制器添加视图。

@interface ViewController : UIViewController <CollapseClickDelegate,UITextFieldDelegate> {

    IBOutlet UIView *test1view;
    IBOutlet UIView *test2view;

    __weak IBOutlet CollapseClick *myCollapseClick;
}

我需要在下面创建50个不同的视图实例。我怎样才能做到这一点？我查看了子视图，但正如我在顶部所说，我是一个新手，无法弄清楚发生了什么。

-Name：
-AMOUNT：
-Percent：

Answer 1

要以编程方式创建视图，请使用viewDidLoad:

的UIViewController

- (void)viewDidLoad
{
    [super viewDidLoad];

    for(int i=0;i<50;i++){
        //provide some initial frame, set the correct frames in viewWillLayoutSubviews: 
        CGRect frame = CGRectMake(0,i*10;100;5);
        //create a new UIView, use your own UIView subclass here if you have one
        UIView *view = [[UIView alloc] initWithFrame:frame];
        //set it's backgroundColor in case you are copy&pasting this code to try it out, so you see that there are actually views added ;)
        view.backgroundColor = [UIColor blueColor];
        //add it to the viewController's view
        [self.view addSubview:view];

        //you might consider creating an NSArray to store references to the views for easier access in other parts of the code
    }
}

要创建您在故事板中设计的视图，请使用此处所述的内容：https://stackoverflow.com/a/13390131/3659846

MyViewController *myViewController = [self.storyboard instantiateViewControllerWithIdentifier:@"MyScene"]; 
[self.view addSubView:myViewController.theViewToAdd];

要从nib文件创建视图，请使用此处描述的方法：https://stackoverflow.com/a/11836614/3659846

NSArray *nibContents = [[NSBundle mainBundle] loadNibNamed:@"yourNib" owner:nil options:nil];
UIView *view = [nibContents lastObject]; //assuming the nib contains only one view
[self.view addSubview:view];

Answer 2

for (int i = 0; i < 50; i++) {
    UIView *someView = [UIView new];
    // this positions each view one under another with height 40px and width 320px like a table
    [someView setFrame:CGRectMake(0,40*i,320,40)];
    // set other view properties 
    // put a UILabel on the view
    UILabel *label = [[UILabel alloc] initWithFrame:CGRectMake(10,10,200,20)];
    [view addSubview:label];
    // set label properties
    [self.view addSubview:someView]
}

请注意，框架相对于其父视图坐标系，您需要通过调用addSubview：方法将视图添加到其父视图。 - 好运

如何多次使用视图？

2 个答案: