在Cocoa中扩展WebView

Question

如何扩展WebView的内容？

Answer 1

您需要在要调整大小的单个帧的文档视图上调用-scaleUnitSquareToSize:，例如主框架：

[[[[webView mainFrame] frameView] documentView] scaleUnitSquareToSize:NSMakeSize(1.5, 1.5)];
[[[[webView mainFrame] frameView] documentView] setNeedsDisplay:YES];

Answer 2

或者您可以尝试以下方法：

- (IBAction)takeZoom:(NSSlider *)sender {
    WebView *aWebView = [[window.contentView subviews] lastObject];
    NSView *clipView = [[[[aWebView mainFrame] frameView] documentView] superview];
    float scale = pow( 4, [sender floatValue] )/(clipView.frame.size.width/clipView.bounds.size.width);
    [clipView scaleUnitSquareToSize:NSMakeSize(scale, scale)];
    [clipView setNeedsDisplay:YES];
}

Answer 3

Javascript是你最好的朋友：

 [_webview stringByEvaluatingJavaScriptFromString:@"document.documentElement.style.zoom = \"0.5\""];

Answer 4

WebView是NSView，因此一种方式是to send it a scaleUnitSquareToSize: message。