如何在MonoTouch中捕获UIWebView错误？ [英] How do I catch UIWebView errors in MonoTouch?
本文介绍了如何在MonoTouch中捕获UIWebView错误？的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
这是针对Objective C中类似问题的答案，但我不确定翻译它的正确方法是什么到了MonoTouch。
Here's an answer for a similar question in Objective C but I'm not sure what's the right way to translate it to MonoTouch.
基本上，我希望能够捕获JavaScript错误并至少知道文件名和行号 - 不幸的是， window.onerror 没有提供这些重要信息。
Basically, I want to be able to catch JavaScript errors and know at least filename and line number—unfortunately, window.onerror doesn't give this crucial information.
特别是，我不确定是否应该公开本机库或者我是否可以写这个纯粹的MonoTouch。
In particular, I'm not sure if I should expose a native library or if I can write this in pure MonoTouch.
推荐答案
我采用了Pablo的 Robert Sanders和Kresimir Prcela的回答。
I adopted Pablo's UIWebView+Debug category inspired by Robert Sanders and Kresimir Prcela's answers.
请注意，他的代码还包含可用于启用的私有API调用远程网络检查员。
（出于某种原因，这件事对我来说不起作用。）
Note that his code also includes a private API call you can use to enable remote web inspector.
(For some reason this thing doesn't work for me though.)
更新： 这里如何调试Mountain Lion中的UIWebView - 你需要下载旧版本的Chromium。
Update: here's how to debug UIWebView in Mountain Lion—you need to download an older version of Chromium.
请记住在调试时仅使用私有API - 如果您提交应用并忘记删除这些电话，Apple将拒绝您的应用。因此，Xcode和MonoDevelop代码都使用 DEBUG 条件。
Remember to only use private API while debugging—if you submit an app and forget to remove these calls, Apple will reject your app. For this reason both Xcode and MonoDevelop code use DEBUG conditions.
这是我正在使用的完整源代码：
Here is the complete source code I'm using:
//
// WebView+Debug.h
// VOL
//
// Created by Pablo Guillen Schlippe on 26.07.11.
// Copyright 2011 Medienhaus.
//
/*
Permission is hereby granted, free of charge, to any person obtaining a copy of this software and
associated documentation files (the "Software"), to deal in the Software without restriction,
including without limitation the rights to use, copy, modify, merge, publish, distribute,
sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all copies or
substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT
NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT
OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
// This little drop in category is based on the following StackOverflow article:
// https://stackoverflow.com/questions/193119/
#ifdef DEBUG
// Use this to toggle logging
#define kDidParseSource 0
#define kFailedToParseSource 1
#define kExceptionWasRaised 1
#define kDidEnterCallFrame 0
#define kWillExecuteStatement 0
#define kWillLeaveCallFrame 0
void enableRemoteWebInspector(void);
#endif
UIWebView + Debug.m
UIWebView+Debug.m
//
// WebView+Debug.m
// VOL
//
// Created by Pablo Guillen Schlippe on 26.07.11.
// Copyright 2011 Medienhaus. All rights reserved.
//
#ifdef DEBUG
#import <objc/runtime.h>
#import "UIWebView+Debug.h"
@class WebView;
@class WebFrame;
@class WebScriptCallFrame;
#pragma mark -
static NSString* getAddress() {
id myhost =[NSClassFromString(@"NSHost") performSelector:@selector(currentHost)];
if (myhost) {
for (NSString* address in [myhost performSelector:@selector(addresses)]) {
if ([address rangeOfString:@"::"].location == NSNotFound) {
return address;
}
}
}
return @"127.0.0.1";
}
void enableRemoteWebInspector() {
[NSClassFromString(@"WebView") performSelector:@selector(_enableRemoteInspector)];
NSLog(@"Point your browser at http://%@:9999", getAddress());
}
#pragma mark -
@interface ScriptDebuggerDelegate : NSObject
-(id)functionNameForFrame:(WebScriptCallFrame*)frame;
-(id)callerForFrame:(WebScriptCallFrame*)frame;
-(id)exceptionForFrame:(WebScriptCallFrame*)frame;
@end
#pragma mark -
@implementation ScriptDebuggerDelegate
// We only have access to the public methods declared in the header / class
// The private methods can also be accessed but raise a warning.
// Use runtime selectors to suppress warnings
#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Warc-performSelector-leaks"
-(id)functionNameForFrame:(WebScriptCallFrame*)frame {
SEL functionNameSelector = @selector(functionName);
return [(id)frame performSelector:functionNameSelector];
}
-(id)callerForFrame:(WebScriptCallFrame*)frame {
SEL callerSelector = @selector(caller);
return [(id)frame performSelector:callerSelector];
}
-(id)exceptionForFrame:(WebScriptCallFrame*)frame {
SEL exceptionSelector = @selector(exception);
return [(id)frame performSelector:exceptionSelector];
}
#pragma clang diagnostic pop
- (void)webView:(WebView *)webView didParseSource:(NSString *)source
baseLineNumber:(unsigned)lineNumber
fromURL:(NSURL *)url
sourceId:(int)sid
forWebFrame:(WebFrame *)webFrame {
if (kDidParseSource)
NSLog(@"ScriptDebugger called didParseSource: \nsourceId=%d, \nurl=%@", sid, url);
}
// some source failed to parse
- (void)webView:(WebView *)webView failedToParseSource:(NSString *)source
baseLineNumber:(unsigned)lineNumber
fromURL:(NSURL *)url
withError:(NSError *)error
forWebFrame:(WebFrame *)webFrame {
if (kFailedToParseSource)
NSLog(@"ScriptDebugger called failedToParseSource:\
\nurl=%@ \nline=%d \nerror=%@ \nsource=%@",
url, lineNumber, error, source);
}
- (void)webView:(WebView *)webView exceptionWasRaised:(WebScriptCallFrame *)frame
sourceId:(int)sid
line:(int)lineno
forWebFrame:(WebFrame *)webFrame {
if (kExceptionWasRaised)
NSLog(@"ScriptDebugger exception:\
\nsourceId=%d \nline=%d \nfunction=%@, \ncaller=%@, \nexception=%@",
sid,
lineno,
[self functionNameForFrame:frame],
[self callerForFrame:frame],
[self exceptionForFrame:frame]);
}
// just entered a stack frame (i.e. called a function, or started global scope)
- (void)webView:(WebView *)webView didEnterCallFrame:(WebScriptCallFrame *)frame
sourceId:(int)sid
line:(int)lineno
forWebFrame:(WebFrame *)webFrame {
if (kDidEnterCallFrame)
NSLog(@"ScriptDebugger didEnterCallFrame:\
\nsourceId=%d \nline=%d \nfunction=%@, \ncaller=%@, \nexception=%@",
sid,
lineno,
[self functionNameForFrame:frame],
[self callerForFrame:frame],
[self exceptionForFrame:frame]);
}
// about to execute some code
- (void)webView:(WebView *)webView willExecuteStatement:(WebScriptCallFrame *)frame
sourceId:(int)sid
line:(int)lineno
forWebFrame:(WebFrame *)webFrame {
if (kWillExecuteStatement)
NSLog(@"ScriptDebugger willExecuteStatement:\
\nsourceId=%d \nline=%d \nfunction=%@, \ncaller=%@, \nexception=%@",
sid,
lineno,
[self functionNameForFrame:frame],
[self callerForFrame:frame],
[self exceptionForFrame:frame]);
}
// about to leave a stack frame (i.e. return from a function)
- (void)webView:(WebView *)webView willLeaveCallFrame:(WebScriptCallFrame *)frame
sourceId:(int)sid
line:(int)lineno
forWebFrame:(WebFrame *)webFrame {
if (kWillLeaveCallFrame)
NSLog(@"ScriptDebugger willLeaveCallFrame:\
\nsourceId=%d \nline=%d \nfunction=%@, \ncaller=%@, \nexception=%@",
sid,
lineno,
[self functionNameForFrame:frame],
[self callerForFrame:frame],
[self exceptionForFrame:frame]);
}
@end
#pragma mark -
@interface UIWebView ()
-(id)setScriptDebugDelegate:(id)delegate;
@end
#pragma mark -
@implementation UIWebView (Debug)
- (void)webView:(id)sender didClearWindowObject:(id)windowObject
forFrame:(WebFrame*)frame {
ScriptDebuggerDelegate* delegate = [[ScriptDebuggerDelegate alloc] init];
objc_setAssociatedObject(sender, @"ScriptDebuggerDelegate", delegate, OBJC_ASSOCIATION_RETAIN);
[sender setScriptDebugDelegate:delegate];
}
@end
#endif
MonoTouch项目
AppDelegate.cs
MonoTouch project
AppDelegate.cs
[Register ("AppDelegate")]
public partial class AppDelegate : UIApplicationDelegate
{
[Conditional("DEBUG")]
[DllImport ("__Internal", EntryPoint = "enableWebInspector")]
public extern static void EnableRemoteWebInspector ();
public override bool FinishedLaunching (UIApplication application, NSDictionary launchOptions)
{
// It will tell you the port in the console,
// More info here: http://antony_perkov.blogspot.com/2012/03/debugging-uiwebview-content-in.html
EnableRemoteWebInspector();
return true;
}
}
因为我无法获得 LinkWith 属性工作正常，我把它放在项目属性中：
Because I couldn't get LinkWith attribute to work properly, I put this in project properties:
模拟器
-gcc_flags "-L${ProjectDir}/Native -lNativeLib-arm7 -force_load ${ProjectDir}/Native/libNativeLib-arm7.a"
设备
-gcc_flags "-L${ProjectDir}/Native -lNativeLib-i386 -force_load ${ProjectDir}/Native/libNativeLib-i386.a"
自定义命令>构建前
命令
Custom Commands > Before Build
Command
模拟器
sh ${SolutionDir}/NativeLib/compile-arm "${ProjectConfigName}"
设备
sh ${SolutionDir}/NativeLib/compile-arm "${ProjectConfigName}"
工作目录
${SolutionDir}/NativeLib
最后，这些是构建脚本：
Finally, these are the build scripts:
xcodebuild -project NativeLib.xcodeproj -target NativeLib -sdk iphonesimulator -configuration $1 clean build
cp build/$1-iphonesimulator/libNativeLib.a ../ProjectName/Native/libNativeLib-i386.a
compile-arm
compile-arm
xcodebuild -project NativeLib.xcodeproj -target NativeLib -sdk iphoneos -arch armv6 -configuration $1 clean build
cp build/$1-iphoneos/libNativeLib.a ../ProjectName/Native/libNativeLib-arm6.a
xcodebuild -project NativeLib.xcodeproj -target NativeLib -sdk iphoneos -arch armv7 -configuration $1 clean build
cp build/$1-iphoneos/libNativeLib.a ../ProjectName/Native/libNativeLib-arm7.a
我意识到这可能不是是最好的方式，但它的工作正常。
如果您知道一个，请随意发布更简单的解决方案。
I realize this may not be the best way to do this, but it works just fine.
Feel free to post a simpler solution if you know one.
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