添加注释

BigShow1949.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist

@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>IDEDidComputeMac32BitWarning</key>
+	<true/>
+</dict>
+</plist>

BigShow1949.xcworkspace/xcuserdata/apple.xcuserdatad/xcdebugger/Breakpoints_v2.xcbkptlist

@@ -51,5 +51,37 @@
             landmarkType = "7">
          </BreakpointContent>
       </BreakpointProxy>
+      <BreakpointProxy
+         BreakpointExtensionID = "Xcode.Breakpoint.FileBreakpoint">
+         <BreakpointContent
+            shouldBeEnabled = "Yes"
+            ignoreCount = "0"
+            continueAfterRunningActions = "No"
+            filePath = "BigShow1949/Classes/05 - KnowledgePoint(&#x96f6;&#x6563;&#x77e5;&#x8bc6;&#x70b9;)/JS/JS_MessageHandler/JS_MessageHandlerViewController.m"
+            timestampString = "551897258.39977"
+            startingColumnNumber = "9223372036854775807"
+            endingColumnNumber = "9223372036854775807"
+            startingLineNumber = "229"
+            endingLineNumber = "229"
+            landmarkName = "-webView:runJavaScriptAlertPanelWithMessage:initiatedByFrame:completionHandler:"
+            landmarkType = "7">
+         </BreakpointContent>
+      </BreakpointProxy>
+      <BreakpointProxy
+         BreakpointExtensionID = "Xcode.Breakpoint.FileBreakpoint">
+         <BreakpointContent
+            shouldBeEnabled = "Yes"
+            ignoreCount = "0"
+            continueAfterRunningActions = "No"
+            filePath = "BigShow1949/Classes/05 - KnowledgePoint(&#x96f6;&#x6563;&#x77e5;&#x8bc6;&#x70b9;)/JS/JS_MessageHandler/JS_MessageHandlerViewController.m"
+            timestampString = "551897258.4074301"
+            startingColumnNumber = "9223372036854775807"
+            endingColumnNumber = "9223372036854775807"
+            startingLineNumber = "245"
+            endingLineNumber = "245"
+            landmarkName = "-userContentController:didReceiveScriptMessage:"
+            landmarkType = "7">
+         </BreakpointContent>
+      </BreakpointProxy>
    </Breakpoints>
 </Bucket>

BigShow1949/Classes/11 - Tools(常用工具)/SafeTool/SafeObject/NSArray+Safe.h

@@ -0,0 +1,13 @@
+//
+//  NSArray+Safe.h
+//  SafeObjectCrash
+//
+//  Created by lujh on 2018/4/18.
+//  Copyright © 2018年 lujh. All rights reserved.
+//
+
+#import <Foundation/Foundation.h>
+
+@interface NSArray (Safe)
+
+@end

BigShow1949/Classes/11 - Tools(常用工具)/SafeTool/SafeObject/NSArray+Safe.m

@@ -0,0 +1,107 @@
+//
+//  NSArray+Safe.m
+//  SafeObjectCrash
+//
+//  Created by lujh on 2018/4/18.
+//  Copyright © 2018年 lujh. All rights reserved.
+//
+
+#import <objc/runtime.h>
+#import "NSArray+Safe.h"
+#import "NSObject+Swizzling.h"
+
+@implementation NSArray (Safe)
+
+#pragma mark --- init method
+
++ (void)load {
+    //只执行一次这个方法
+    static dispatch_once_t onceToken;
+    dispatch_once(&onceToken, ^{
+
+        //替换 objectAtIndex
+        NSString *tmpStr = @"objectAtIndex:";
+        NSString *tmpFirstStr = @"safe_ZeroObjectAtIndex:";
+        NSString *tmpThreeStr = @"safe_objectAtIndex:";
+        NSString *tmpSecondStr = @"safe_singleObjectAtIndex:";
+
+        // 替换 objectAtIndexedSubscript
+
+        NSString *tmpSubscriptStr = @"objectAtIndexedSubscript:";
+        NSString *tmpSecondSubscriptStr = @"safe_objectAtIndexedSubscript:";
+
+
+        [NSObject exchangeInstanceMethodWithSelfClass:NSClassFromString(@"__NSArray0")
+                                     originalSelector:NSSelectorFromString(tmpStr)                                     swizzledSelector:NSSelectorFromString(tmpFirstStr)];
+
+        [NSObject exchangeInstanceMethodWithSelfClass:NSClassFromString(@"__NSSingleObjectArrayI")
+                                     originalSelector:NSSelectorFromString(tmpStr)                                     swizzledSelector:NSSelectorFromString(tmpSecondStr)];
+
+        [NSObject exchangeInstanceMethodWithSelfClass:NSClassFromString(@"__NSArrayI")
+                                     originalSelector:NSSelectorFromString(tmpStr)                                     swizzledSelector:NSSelectorFromString(tmpThreeStr)];
+
+        [NSObject exchangeInstanceMethodWithSelfClass:NSClassFromString(@"__NSArrayI")
+                                     originalSelector:NSSelectorFromString(tmpSubscriptStr)                                     swizzledSelector:NSSelectorFromString(tmpSecondSubscriptStr)];
+
+    });
+
+}
+
+
+#pragma mark --- implement method
+
+/**
+ 取出NSArray 第index个 值 对应 __NSArrayI
+ 
+ @param index 索引 index
+ @return 返回值
+ */
+- (id)safe_objectAtIndex:(NSUInteger)index {
+    if (index >= self.count){
+        return nil;
+    }
+    return [self safe_objectAtIndex:index];
+}
+
+
+/**
+ 取出NSArray 第index个 值 对应 __NSSingleObjectArrayI
+ 
+ @param index 索引 index
+ @return 返回值
+ */
+- (id)safe_singleObjectAtIndex:(NSUInteger)index {
+    if (index >= self.count){
+        return nil;
+    }
+    return [self safe_singleObjectAtIndex:index];
+}
+
+/**
+ 取出NSArray 第index个 值 对应 __NSArray0
+ 
+ @param index 索引 index
+ @return 返回值
+ */
+- (id)safe_ZeroObjectAtIndex:(NSUInteger)index {
+    if (index >= self.count){
+        return nil;
+    }
+    return [self safe_ZeroObjectAtIndex:index];
+}
+
+/**
+ 取出NSArray 第index个 值 对应 __NSArrayI
+ 
+ @param idx 索引 idx
+ @return 返回值
+ */
+- (id)safe_objectAtIndexedSubscript:(NSUInteger)idx {
+    if (idx >= self.count){
+        return nil;
+    }
+    return [self safe_objectAtIndexedSubscript:idx];
+}
+
+
+@end

BigShow1949/Classes/11 - Tools(常用工具)/SafeTool/SafeObject/NSDictionary+Safe.h

@@ -0,0 +1,13 @@
+//
+//  NSDictionary+Safe.h
+//  SafeObjectCrash
+//
+//  Created by lujh on 2018/4/18.
+//  Copyright © 2018年 lujh. All rights reserved.
+//
+
+#import <Foundation/Foundation.h>
+
+@interface NSDictionary (Safe)
+
+@end

BigShow1949/Classes/11 - Tools(常用工具)/SafeTool/SafeObject/NSDictionary+Safe.m

@@ -0,0 +1,30 @@
+//
+//  NSDictionary+Safe.m
+//  SafeObjectCrash
+//
+//  Created by lujh on 2018/4/18.
+//  Copyright © 2018年 lujh. All rights reserved.
+//
+
+#import "NSDictionary+Safe.h"
+#import <objc/runtime.h>
+#import "NSObject+ImpChangeTool.h"
+
+@implementation NSDictionary (Safe)
++ (void)load{
+    [self SwizzlingMethod:@"initWithObjects:forKeys:count:" systemClassString:@"__NSPlaceholderDictionary" toSafeMethodString:@"initWithObjects_st:forKeys:count:" targetClassString:@"NSDictionary"];
+}
+-(instancetype)initWithObjects_st:(id *)objects forKeys:(id<NSCopying> *)keys count:(NSUInteger)count {
+    NSUInteger rightCount = 0;
+    for (NSUInteger i = 0; i < count; i++) {
+        if (!(keys[i] && objects[i])) {
+            break;
+        }else{
+            rightCount++;
+        }
+    }
+    self = [self initWithObjects_st:objects forKeys:keys count:rightCount];
+    return self;
+}
+
+@end

BigShow1949/Classes/11 - Tools(常用工具)/SafeTool/SafeObject/NSMutableArray+Safe.h

@@ -0,0 +1,13 @@
+//
+//  NSMutableArray+Safe.h
+//  SafeObjectCrash
+//
+//  Created by lujh on 2018/4/18.
+//  Copyright © 2018年 lujh. All rights reserved.
+//
+
+#import <Foundation/Foundation.h>
+
+@interface NSMutableArray (Safe)
+
+@end