当没有要显示的 iAd 横幅时，我们希望显示指向特定 URL 的相同尺寸的 UIWebView。
但是，隐藏 iAd 横幅并显示 UIWebView 不起作用。我们将显示/隐藏代码嵌入到bannerViewDidLoadAd和didFailToReceiveAdWithError. 当没有 iAd 库存而不是我们的 UIWebView 时，出现的只是白色的空白矩形。
如果用户单击 UIWebView 内的链接，我们希望该链接在 Safari 中打开。我们是否需要向 UIWebView 添加委托？
代码：
//
// SAiOSAdPlugin.m
// Ad Plugin for PhoneGap
//
// Created by shazron on 10-07-12.
// Copyright 2010 Shazron Abdullah. All rights reserved.
// Cordova v1.5.0 Support added 2012 @RandyMcMillan
//
#import "SAiOSAdPlugin.h"
//#ifdef CORDOVA_FRAMEWORK
#import <Cordova/CDVDebug.h>
//#else
//#import "CDVDebug.h"
//#endif
@interface SAiOSAdPlugin(PrivateMethods)
- (void) __prepare:(BOOL)atBottom;
- (void) __showAd:(BOOL)show;
@end
@implementation SAiOSAdPlugin
@synthesize adView;
@synthesize bannerIsVisible, bannerIsInitialized, bannerIsAtBottom, isLandscape;
#pragma mark -
#pragma mark Public Methods
- (void) resizeViews
{
Class adBannerViewClass = NSClassFromString(@"ADBannerView");
if (adBannerViewClass && self.adView)
{
CGRect webViewFrame = [super webView].frame;
CGRect superViewFrame = [[super webView] superview].frame;
CGRect adViewFrame = self.adView.frame;
BOOL adIsShowing = [[[super webView] superview].subviews containsObject:self.adView];
if (adIsShowing)
{
if (self.bannerIsAtBottom) {
webViewFrame.origin.y = 0;
CGRect adViewFrame = self.adView.frame;
CGRect superViewFrame = [[super webView] superview].frame;
adViewFrame.origin.y = (self.isLandscape ? superViewFrame.size.width : superViewFrame.size.height) - adViewFrame.size.height;
self.adView.frame = adViewFrame;
} else {
webViewFrame.origin.y = adViewFrame.size.height;
}
webViewFrame.size.height = self.isLandscape? (superViewFrame.size.width - adViewFrame.size.height) : (superViewFrame.size.height - adViewFrame.size.height);
}
else
{
webViewFrame.size = self.isLandscape? CGSizeMake(superViewFrame.size.height, superViewFrame.size.width) : superViewFrame.size;
webViewFrame.origin = CGPointZero;
}
[UIView beginAnimations:@"blah" context:NULL];
[UIView setAnimationCurve:UIViewAnimationCurveEaseInOut];
[super webView].frame = webViewFrame;
[UIView commitAnimations];
}
}
- (void) orientationChanged:(NSMutableArray*)arguments withDict:(NSMutableDictionary*)options;
{
NSInteger orientation = [[arguments objectAtIndex:0] integerValue];
switch (orientation) {
// landscape
case 90:
case -90:
self.isLandscape = YES;
break;
// portrait
case 0:
case 180:
self.isLandscape = NO;
break;
default:
break;
}
Class adBannerViewClass = NSClassFromString(@"ADBannerView");
if (adBannerViewClass && self.adView)
{
self.adView.currentContentSizeIdentifier = self.isLandscape ? ADBannerContentSizeIdentifierLandscape : ADBannerContentSizeIdentifierPortrait;
[self resizeViews];
}
}
- (void) prepare:(NSMutableArray*)arguments withDict:(NSMutableDictionary*)options
{
NSUInteger argc = [arguments count];
if (argc > 1) {
return;
}
NSString* atBottomValue = [arguments objectAtIndex:0];
[self __prepare:[atBottomValue boolValue]];
}
- (void) showAd:(NSMutableArray*)arguments withDict:(NSMutableDictionary*)options
{
NSUInteger argc = [arguments count];
if (argc > 1) {
return;
}
NSString* showValue = [arguments objectAtIndex:0];
[self __showAd:[showValue boolValue]];
}
#pragma mark -
#pragma mark Private Methods
- (void) __prepare:(BOOL)atBottom
{
NSLog(@"SAiOSAdPlugin Prepare Ad At Bottom: %d", atBottom);
Class adBannerViewClass = NSClassFromString(@"ADBannerView");
if (adBannerViewClass && !self.adView)
{
self.adView = [[ADBannerView alloc] initWithFrame:CGRectMake(0, 0, 320, 50)];
// we are still using these constants even though they are deprecated - if it is changed, iOS 4 devices < 4.3 will crash.
// will need to do a run-time iOS version check
self.adView.requiredContentSizeIdentifiers = [NSSet setWithObjects: ADBannerContentSizeIdentifierPortrait, ADBannerContentSizeIdentifierLandscape, nil];
self.adView.delegate = self;
NSString* contentSizeId = (self.isLandscape ? ADBannerContentSizeIdentifierLandscape : ADBannerContentSizeIdentifierPortrait);
self.adView.currentContentSizeIdentifier = contentSizeId;
if (atBottom) {
self.bannerIsAtBottom = YES;
}
self.bannerIsVisible = NO;
self.bannerIsInitialized = YES;
self.houseAdView = [[UIWebView alloc] initWithFrame: CGRectMake(0.0, 0.0, 1.0, 1.0)];
self.houseAdView.frame = self.adView.frame;
NSURLRequest *request = [[NSURLRequest alloc] initWithURL: [NSURL URLWithString: @"http://www.panabee.com"]];
[self.houseAdView loadRequest: request];
}
}
- (void) __showAd:(BOOL)show
{
NSLog(@"SAiOSAdPlugin Show Ad: %d", show);
if (!self.bannerIsInitialized){
[self __prepare:NO];
}
if (!(NSClassFromString(@"ADBannerView") && self.adView)) { // ad classes not available
return;
}
if (show == self.bannerIsVisible) { // same state, nothing to do
return;
}
if (show)
{
[UIView beginAnimations:@"blah" context:NULL];
[UIView setAnimationCurve:UIViewAnimationCurveEaseInOut];
[[[super webView] superview] addSubview:self.adView];
[[[super webView] superview] bringSubviewToFront:self.houseAdView];
[[[super webView] superview] bringSubviewToFront:self.adView];
[self resizeViews];
[UIView commitAnimations];
self.bannerIsVisible = YES;
}
else
{
[UIView beginAnimations:@"blah" context:NULL];
[UIView setAnimationCurve:UIViewAnimationCurveEaseInOut];
[self.adView removeFromSuperview];
[self resizeViews];
[UIView commitAnimations];
self.bannerIsVisible = NO;
}
}
#pragma mark -
#pragma ADBannerViewDelegate
- (void)bannerViewDidLoadAd:(ADBannerView *)banner
{
Class adBannerViewClass = NSClassFromString(@"ADBannerView");
if (adBannerViewClass)
{
NSString* jsString =
@"(function(){"
"var e = document.createEvent('Events');"
"e.initEvent('iAdBannerViewDidLoadAdEvent');"
"document.dispatchEvent(e);"
"})();";
[banner setHidden:YES];
[self.houseAdView setHidden:NO];
[super writeJavascript:[NSString stringWithFormat:jsString]];
}
}
- (void)bannerView:(ADBannerView *)banner didFailToReceiveAdWithError:(NSError*)error
{
Class adBannerViewClass = NSClassFromString(@"ADBannerView");
if (adBannerViewClass)
{
NSString* jsString =
@"(function(){"
"var e = document.createEvent('Events');"
"e.initEvent('iAdBannerViewDidFailToReceiveAdWithErrorEvent');"
"e.error = '%@';"
"document.dispatchEvent(e);"
"})();";
[banner setHidden:YES];
[self.houseAdView setHidden:NO];
[super writeJavascript:[NSString stringWithFormat:jsString, [error description]]];
}
}
@end