ios横竖屏配置subViews

最新推荐文章于 2022-07-12 11:28:26 发布

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本文详细介绍了如何在iOS应用中实现横竖屏切换时，通过`layoutSubviews`方法调整视图布局，确保界面始终保持最佳显示状态。通过自定义视图类和响应系统屏幕方向变化，实现了视图在不同屏幕尺寸和方向下的动态调整，包括背景视图和内容视图的位置和大小变化。

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ayoutSubviews的调用时机：

1.init时不会被调用、
2.将要真正显示的会调用
3.frame发现改变时智能调用
4.滚动、旋转、remove等等时

这些时机都是和frame相关的，也是唯一能更新子视图的最好时机

layoutSubviews的调用时机：http://blog.youkuaiyun.com/zhangao0086/article/details/6904854
drawRect是在视图被真正显示的时候，如果layer的contents没有内容，就会被调用

横竖屏demo：

A:----views

@interface DetialViews ()<UIWebViewDelegate>{
    UIView *bgView;
    UIWebView *webView;
}

@end

@implementation DetialViews

- (instancetype)initWithFrame:(CGRect)frame{
    self = [super initWithFrame:frame];
    if (self) {

    }
    return self;
}

- (void)willMoveToSuperview:(UIView *)newSuperview{
    if (newSuperview !=nil) {
        if ([self respondsToSelector:@selector(setupViews)]) {
            [self setupViews];
        }
        if ([self respondsToSelector:@selector(addSubviews)]) {
            [self addSubviews];
        }

    }
}

- (void)layoutSubviews{
    [super layoutSubviews];
    switch ([[UIApplication sharedApplication] statusBarOrientation]) {
        case UIInterfaceOrientationLandscapeLeft:
        case UIInterfaceOrientationPortrait:{
            if ( [self respondsToSelector:@selector(layoutPortrait)]) {
                [self layoutPortrait];
            }
        }
            break;
            case UIInterfaceOrientationLandscapeRight:
        {
            if ([self respondsToSelector:@selector(layoutLandscape)]) {
                [self layoutLandscape];
            }
        }
            break;
            case UIInterfaceOrientationPortraitUpsideDown:
        default:
            break;
    }
}
- (void)setupViews{
    bgView = [[UIView alloc] init];
    bgView.backgroundColor = [UIColor blueColor];

    webView = [[UIWebView alloc] init];
    webView.backgroundColor = [UIColor whiteColor];
    NSURL *url =[NSURL URLWithString:@"https://www.baidu.com"];
    NSURLRequest *request =[NSURLRequest requestWithURL:url];
    [webView loadRequest:request];
}

- (void)addSubviews{

    [self addSubview:bgView];
    [self addSubview:webView];
}

- (void)layoutLandscape{
    [bgView setFrame:CGRectMake(0, 0, TjScreeenWeight, 60)];
    [webView setFrame:CGRectMake(0, bgView.frame.size.height+bgView.frame.origin.y, self.frame.size.width, TjScreenHeight - bgView.frame.size.height )];

    NSLog(@"home右边----->%f---%f",bgView.bounds.size.width,bgView.bounds.size.height);
}

- (void)layoutPortrait{
    [bgView setFrame:CGRectMake(0, 0, TjScreeenWeight, 60)];
    [webView setFrame:CGRectMake(0, bgView.frame.size.height+bgView.frame.origin.y, self.frame.size.width, TjScreenHeight - bgView.frame.size.height )];
    NSLog(@"home下边----->%f---%f",bgView.bounds.size.width,bgView.bounds.size.height);
}

B: viewController

#import "DetialVViewController.h"
#import "DetialViews.h"

@interface DetialVViewController (){
    DetialViews * _detialView;
}

@end

@implementation DetialVViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    [self addSubViews];
}
- (void)addSubViews{
    _detialView = [[DetialViews alloc] initWithFrame:self.view.bounds];
    [self.view addSubview:_detialView];
}