iPhone控件之UIView

最新推荐文章于 2019-03-08 10:22:30 发布

转载最新推荐文章于 2019-03-08 10:22:30 发布 · 68 阅读

本文详细介绍了如何使用Objective-C编程语言创建复杂的视图动画效果，包括子视图的大小变化、位置调整以及颜色变化等。通过实例演示了如何设置视图的属性、使用UIView类的方法实现动画，并在代码中加入关键的自定义动画逻辑。

- (void)viewDidLoad {

    [super viewDidLoad];

    CGPoint frameCenter = self.view.center;
float width = 50.0;
float height = 50.0;

    CGRect viewFrame = CGRectMake(frameCenter.x-width,frameCenter.y-height, width*2, height*2);
    UIView *myView = [[UIView alloc] initWithFrame:viewFrame];
    myView.backgroundColor = [UIColor blueColor];

//create subview
    CGRect subViewFrame = CGRectInset(myView.bounds, width/2.0, height/2.0);
    UIView *mySubview = [[UIView alloc] initWithFrame:subViewFrame];
    mySubview.backgroundColor = [UIColor yellowColor];

//set autoresizing mask
    mySubview.autoresizingMask = UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight;

    [myView addSubview:mySubview];

    [[self view] addSubview:myView];

//animate resize
    [UIView beginAnimations:nil context:NULL];

    [UIView setAnimationDuration:1.0];
    viewFrame = CGRectInset(viewFrame, -width, -height);
    [myView setFrame:viewFrame];

    [UIView commitAnimations];

    [mySubview release];
    [myView release];    
}