Cordova中iOS端訪問遠程web鏈接調(diào)用Cordova插件

最近項目采用cordova框架開發(fā)甚脉，所以就苦了前端同學滚澜，稍微改動都要Jenkins去打包蓉媳，所以在想能不能直接訪問前端同學本地鏈接八酒，改完直接就能生效那種空民，下面開始。

1.修改config.xml文件

在config.xml文件中添加以下代碼：

<content src="http://192.168.18.126:8081/#/" />
<allow-navigation href="http://*/*" />
<allow-navigation href="https://*/*" />

說明：后面兩個屬性是允許APP加載外部鏈接羞迷，不加的話會直接跳轉瀏覽器訪問界轩。

2.修改訪問的index.html代碼

var script = document.createElement('script'); 
script.type = "text/javascript"; 
script.src="http://injection/cordova.js"; 
document.getElementsByTagName('body')[0].appendChild(script);

說明：這段代碼要添加在所有js文件加載完之后，因為cordova不允許web直接訪問"file://"開頭的鏈接衔瓮，所以需要前端文件將cordova.js的路徑替換為

http://injection/cordova.js

3.添加CDVURLProtocolCustom

這個類的作用是攔截web發(fā)出的請求浊猾，將第二步中的

http://injection/cordova.js

攔截，之后跳轉本地cordova.js热鞍。

CDVURLProtocolCustom.h

#import <Foundation/Foundation.h>
#import <UIKit/UIKit.h>

@interface CDVURLProtocolCustom : NSURLProtocol

@end

CDVURLProtocolCustom.m

#import "CDVURLProtocolCustom.h"
#import <CoreServices/CoreServices.h>

@interface CDVURLProtocolCustom ()

@end

NSString* const kCDVAssetsLibraryPrefixes = @"http://injection/cordova.js";

@implementation CDVURLProtocolCustom

// 這個方法用來攔截H5頁面請求
+ (BOOL)canInitWithRequest:(NSURLRequest*)theRequest
{
    NSURL* theUrl = [theRequest URL];
    
    // 判斷是否是我們定義的url葫慎，若是，返回YES薇宠，繼續(xù)執(zhí)行其他方法偷办，若不是，返回NO澄港，不執(zhí)行其他方法
    if ([[theUrl absoluteString] hasPrefix:kCDVAssetsLibraryPrefixes]) {
        return YES;
    }
    
    return NO;
}

+ (NSURLRequest*)canonicalRequestForRequest:(NSURLRequest*)request
{
    // NSLog(@"%@ received %@", self, NSStringFromSelector(_cmd));
    return request;
}
// 獲取本地文件路徑
- (NSString*)pathForResource:(NSString*)resourcepath
{
    NSBundle* mainBundle = [NSBundle mainBundle];
    NSMutableArray* directoryParts = [NSMutableArray arrayWithArray:[resourcepath componentsSeparatedByString:@"/"]];
    NSString* filename = [directoryParts lastObject];
    
    [directoryParts removeLastObject];
    NSString* directoryPartsJoined = [directoryParts componentsJoinedByString:@"/"];
    NSString* directoryStr = @"www";
    
    if ([directoryPartsJoined length] > 0) {
        directoryStr = [NSString stringWithFormat:@"%@/%@", directoryStr, [directoryParts componentsJoinedByString:@"/"]];
    }
    
    return [mainBundle pathForResource:filename ofType:@"" inDirectory:directoryStr];
}

// 在canInitWithRequest方法返回YES以后椒涯，會執(zhí)行該方法，完成替換資源并返回給H5頁面
- (void)startLoading
{
    // NSLog(@"%@ received %@ - start", self, NSStringFromSelector(_cmd));
    NSString* url=super.request.URL.resourceSpecifier;
    NSString* cordova = [url stringByReplacingOccurrencesOfString:@"http://injection/" withString:@""];
    NSURL* startURL = [NSURL URLWithString:cordova];
    
    
    NSString* cordovaFilePath =[self pathForResource:[startURL path]];
    if (!cordovaFilePath) {
        [self sendResponseWithResponseCode:401 data:nil mimeType:nil];//重要
        return;
    }
    CFStringRef pathExtension = (__bridge_retained CFStringRef)[cordovaFilePath pathExtension];
    CFStringRef type = UTTypeCreatePreferredIdentifierForTag(kUTTagClassFilenameExtension, pathExtension, NULL);
    CFRelease(pathExtension);
    NSString *mimeType = (__bridge_transfer NSString *)UTTypeCopyPreferredTagWithClass(type, kUTTagClassMIMEType);
    if (type != NULL)
        CFRelease(type);
    //    NSURLResponse *response = [[NSURLResponse alloc] initWithURL:super.request.URL    MIMEType:mimeType expectedContentLength:-1 textEncodingName:nil];
    NSData* data = [NSData dataWithContentsOfFile:cordovaFilePath];
    [self sendResponseWithResponseCode:200 data:data mimeType:mimeType];
}


- (void)stopLoading
{
    // do any cleanup here
}

+ (BOOL)requestIsCacheEquivalent:(NSURLRequest*)requestA toRequest:(NSURLRequest*)requestB
{
    return NO;
}

// 將本地資源返回給H5頁面
- (void)sendResponseWithResponseCode:(NSInteger)statusCode data:(NSData*)data mimeType:(NSString*)mimeType
{
    if (mimeType == nil) {
        mimeType = @"text/plain";
    }
    
    NSHTTPURLResponse* response = [[NSHTTPURLResponse alloc] initWithURL:[[self request] URL] statusCode:statusCode HTTPVersion:@"HTTP/1.1" headerFields:@{@"Content-Type" : mimeType}];
    
    [[self client] URLProtocol:self didReceiveResponse:response cacheStoragePolicy:NSURLCacheStorageNotAllowed];
    if (data != nil) {
        [[self client] URLProtocol:self didLoadData:data];
    }
    [[self client] URLProtocolDidFinishLoading:self];
}

@end

4.初始化CDVURLProtocolCustom

在CDVAppdelegate的application:(UIApplication*)application didFinishLaunchingWithOptions:方法中添加

[NSURLProtocol registerClass:[CDVURLProtocolCustom class]]慢睡；

5.遇到問題

Q:'CDVURLProtocolCustom.h' file not found

Q1.png

解決：將CDVURLProtocolCustom移動到Public文件夾下逐工，與CDVAppdelegate同級即可，刪除plugins下的文件漂辐，如下圖所示泪喊。

Q2.png

Q3.png

編譯成功，希望遇到同樣問題的同學可以避免髓涯。