你既可以在全页面中使用 Weex，也可以在一个 view 中渲染 Weex。只需要创建一个 Weex 实例并指定好回调方法，提供一个合法的 URL 就可以了。在 ​onCreate​ 回调方法中将根 view 添加到你想显示内容的地方，并通过​ instance.frame =​ 来设置它的尺寸和位置。

#import <WeexSDK/WXSDKInstance.h>

- (void)viewDidLoad
{
    [super viewDidLoad];
    _instance = [[WXSDKInstance alloc] init];
    _instance.viewController = self;
    _instance.frame = self.view.frame;
    __weak typeof(self) weakSelf = self;
    _instance.onCreate = ^(UIView *view) {
        [weakSelf.weexView removeFromSuperview];
        weakSelf.weexView = view;
        [weakSelf.view addSubview:view];
    };
    _instance.onFailed = ^(NSError *error) {
        //process failure, you could open an h5 web page instead or just show the error.
    };
    _instance.renderFinish = ^ (UIView *view) {
        //process renderFinish
    };
    NSURL *url = [[NSBundle mainBundle] URLForResource:@"main" withExtension:@"js"];
    [_instance renderWithURL:url options:@{@"bundleUrl":[self.url absoluteString]} data:nil];
}