javascript - How to preselect contenteditable field in UIWebView iOS5

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javascript - How to preselect contenteditable field in UIWebView iOS5

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

First of all I know contenteditable is only iOS 5 I have accounted for this - we are giving users with iOS 5 a feature to allow Rich Text pasting using contenteditable. This feature works great so far all I want to do is when the view appears to set the contenteditable field as active (pre-select it) so that the keyboard appears and the user can begin typing right-away. Here is the local html file I am using for the UIWebView

<html>
    <body>
        <div id="content" contenteditable="true" style="font-family: Helvetica">PLACEHOLDER</div>
    </body>
</html>

I have already tried using some javascript to accomplish this using tutorials that I found for preselecting a text input. I could not get this to work, even when I tried to switch to a text input field for testing. This is probably due to my inexperience with javascipt so if that is the solution please be explicit (as I am completely unfamiliar with javascript).

Thanks for any help

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1 Answer

深蓝 · Answer 1 · 2021-10-23T19:24:56+0000

Now if anyone wants to achieve this in iOS 6, he can open iOS keyboard programmatically like this,

- (void)viewDidLoad
{
    [super viewDidLoad];
    // Do any additional setup after loading the view from its nib.

    // keyboardDisplayRequiresUserAction available in iOS >= 6 
    if ([webView respondsToSelector:@selector(setKeyboardDisplayRequiresUserAction:)]) {
        webView.keyboardDisplayRequiresUserAction = NO;
    }
}

and then,

- (void)webViewDidFinishLoad:(UIWebView *)webView {
    // Assuming that you're using jquery. If not, use document.getElementById('YourInputElementID')
    NSString *evalStr = [NSString stringWithFormat:@"setTimeout( function(){$('#YourInputElementID').focus();},1000);"];
    [webView stringByEvaluatingJavaScriptFromString:evalStr];
}

This will run this javascript after 1sec. For safe side you should call the get focus code when the focusing element has been loaded.

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