Reputation: 4066
I have a UIWebView which is already filled by my request (loadRequest).
I would like to add a UIButton in it. It's easy to write this simple code :
[self.myWebView loadRequest:request];
[self.myWebView addSubview:myButton];
However, it seems the UIButton won't scroll with the UIWebView's content. It stays fixed like a layer on top of the UIWebView. So when the user scrolls, the UIButton gets un-synchronized with the content.
Any ideas ?
Upvotes: 3
Views: 6436
Reputation: 1972
On iOS 5 you can directly access a UIWebView's scroll view, which is where you really want to add your button, https://developer.apple.com/documentation/uikit/uiwebview/1617955-scrollview. But I tend to agree with the previous commenters, you should probably be considering a different approach as mixing UIKit with a web view isn't really meant to work how you describe.
Upvotes: 0
Reputation: 13306
Continuing with axiixc's comment, here is some code that you might use to place a button at the bottom of the webview. By putting the positioning code in layout subviews you can handle rotation properly.
- (void)webViewDidFinishLoad:(UIWebView *)webview{
if (!_button){
UIButton *button = [UIButton buttonWithType:UIButtonTypeSystem];
[button setTitle:@"Move All Blue Cards to Known" forState:UIControlStateNormal];
[button setBackgroundImage:[UIImage imageNamed:@"signin-button-blue-color"] forState:UIControlStateNormal];
[button setTitleColor:[UIColor whiteColor] forState:UIControlStateNormal];
button.titleLabel.font = [UIFont boldSystemFontOfSize:16.0];
[_webview.scrollView addSubview:button];
_button = button;
}
[self setNeedsLayout];
[self layoutIfNeeded];
}
- (void)layoutSubviews{
[super layoutSubviews];
float y = 0;
CGRect originalRect = _webview.frame;
_webview.frame = CGRectMake(0, 0, originalRect.size.width, 1); // Trick the webview into giving the right size for content
CGSize contentSize = _webview.scrollView.contentSize;
_webview.frame = originalRect;
if (contentSize.height < _webview.frame.size.height){ // This keeps the button at the bottom of the webview, or at the bottom of the content, as needed.
y = _webview.frame.size.height - 64; // 44 tall + 20 offset from the bottom
} else {
y = contentSize.height + 20;
}
_button.frame = CGRectMake(20, y, self.frame.size.width-40, 44); // 40/2 = 20 px on each side
contentSize.height = CGRectGetMaxY(_button.frame)+20;
_webview.scrollView.contentSize = contentSize;
}
Upvotes: 0
Reputation: 106
You can inject html markup such as <a href='yourTag01'> <button>My Button </button> </a> into the content of your UIWebview using stringByEvaluatingJavaScriptFromString method.
To capture the click event and prevent it from reloading content of your webview use this delegate:
- (BOOL)webView:(UIWebView *)webView shouldStartLoadWithRequest:(NSURLRequest *)request navigationType:(UIWebViewNavigationType)navigationType
{
if(navigationType==UIWebViewNavigationTypeLinkClicked && [[request.URL absoluteString] isEqualToString: @"yourTag01"])
{
//your custom action code goes here
return NO;
}
return YES;
}
Upvotes: 9
Reputation: 28688
You can't do this in any sane straightforward way. You may want to reevaluate what you're doing.
Upvotes: 5