5

嗨,如果用户使用的是 iOS 9 或更高版本,我想从 safari 视图控制器中的表格视图单元格打开我的网站。如果用户使用的是 iOS 7 或 8,则该网站应在标准 Safari 应用程序中打开。

这是我目前使用的打开 safari 的代码。

    case 3: { // Follow us section
        switch (indexPath.row) {
            case 0: { //Website
                NSURL *url = [NSURL URLWithString:@"http://www.scanmarksapp.com"];
                if (![[UIApplication sharedApplication] openURL:url]) {
                    NSLog(@"%@%@",@"Failed to open url:",[url description]);
                }
            }
                break;

            default:
                break;
        }

    }
        break;

我相信这段代码应该用我的网站打开 safari 视图控制器。但我不确定如何组合两组代码。

- (void)openLink:(NSString *)url {

NSURL *URL = [NSURL URLWithString:[NSString stringWithFormat:@"http://www.scanmarksapp.com", url]];
if (URL) {
    SFSafariViewController *sfvc = [[SFSafariViewController alloc] initWithURL:URL];
    sfvc.delegate = self;
    [self presentViewController:sfvc animated:YES completion:nil];
}

#pragma Safari View Controller Delegate

- (void)safariViewControllerDidFinish:(nonnull SFSafariViewController *)controller {
[controller dismissViewControllerAnimated:YES completion:nil];
}

我知道这是用于确定 iOS 版本的代码

if ([[[UIDevice currentDevice] systemVersion] floatValue] < 9.0) {

我听从了你的建议

- (void)openLink:(NSString *)url {

NSURL *URL = [NSURL URLWithString:[NSString stringWithFormat:@"http://www.scanmarksapp.com", url]];
if (URL) {
    SFSafariViewController *sfvc = [[SFSafariViewController alloc] initWithURL:URL];
    sfvc.delegate = self;
    [self presentViewController:sfvc animated:YES completion:nil];
} else {
    // will have a nice alert displaying soon.
}

if ([SFSafariViewController class] != nil) {
    // Use SFSafariViewController
} else {
    NSURL *url = [NSURL URLWithString:@"http://www.scanmarksapp.com"];
    if (![[UIApplication sharedApplication] openURL:url]) {
        NSLog(@"%@%@",@"Failed to open url:",[url description]);
    }
}

然后在我的表格视图单元didSelectRowAtIndexPath下添加了这段代码

        case 3: { // Follow us section
        switch (indexPath.row) {
            case 0: { //Website
                NSURL *URL = [NSURL URLWithString:[NSString stringWithFormat:@"http://www.scanmarksapp.com", url]];
                if (URL) {
                    SFSafariViewController *sfvc = [[SFSafariViewController alloc] initWithURL:URL];
                    sfvc.delegate = self;
                    [self presentViewController:sfvc animated:YES completion:nil];
                } else {
                    // will have a nice alert displaying soon.
                }

                if ([SFSafariViewController class] != nil) {
                    // Use SFSafariViewController
                } else {
                    NSURL *url = [NSURL URLWithString:@"http://www.scanmarksapp.com"];
                    if (![[UIApplication sharedApplication] openURL:url]) {
                        NSLog(@"%@%@",@"Failed to open url:",[url description]);
                    }

                }
            }
                break;

            default:
                break;
        }

    }
        break;

我在这行代码中收到错误“使用未声明的标识符 url”

NSURL *URL = [NSURL URLWithString:[NSString stringWithFormat:@"http://www.scanmarksapp.com", url]];

删除 NSStringWithFormat 末尾的 url 会使 Safari 视图控制器工作。然而,在低于 9.0(例如 8.4)的 iOS 上,应用程序崩溃。

4

1 回答 1

19

标准和推荐的方法是检查功能,而不是操作系统版本。在这种情况下,您可以检查 SFSafariViewController 类是否存在。

if ([SFSafariViewController class] != nil) {
    // Use SFSafariViewController
} else {
    // Open in Mobile Safari
}

编辑

你的实现openLink:是错误的。

- (void)openLink:(NSString *)url {
    NSURL *URL = [NSURL URLWithString:url];

    if (URL) {
        if ([SFSafariViewController class] != nil) {
            SFSafariViewController *sfvc = [[SFSafariViewController alloc] initWithURL:URL];
            sfvc.delegate = self;
            [self presentViewController:sfvc animated:YES completion:nil];
        } else {
            if (![[UIApplication sharedApplication] openURL:url]) {
                NSLog(@"%@%@",@"Failed to open url:",[url description]);
            }
        }
    } else {
        // will have a nice alert displaying soon.
    }
}
于 2015-11-26T03:04:40.347 回答