1.增加JS扩展。

common/NSString/NSString+RAJavascript.h

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+//
+//  NSString+RAJavascript.h
+//  APEX CRM
+//
+//  Created by Jack on 2018/12/1.
+//  Copyright © 2018年 USAI. All rights reserved.
+//
+
+#import <Foundation/Foundation.h>
+
+@interface NSString (RAJavascript)
+
+- (NSString *)ra_stringByEscapingForJavascriptWithDelimiter:(unichar)delimiter wrapWithDelimiters:(BOOL)wrap;
+
+@end

common/NSString/NSString+RAJavascript.m

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+//
+//  NSString+RAJavascript.m
+//  APEX CRM
+//
+//  Created by Jack on 2018/12/1.
+//  Copyright © 2018年 USAI. All rights reserved.
+//
+
+#import "NSString+RAJavascript.h"
+
+@implementation NSString (RAJavascript)
+
+
+- (unsigned char)ra_hexCharFromInt:(int)value
+{
+    if (value <= 9) return (unsigned char)(value + 48);
+    return (unsigned char)((value - 10) + 97);
+}
+
+- (NSString *)ra_unicodeStringForChar:(unichar)ch
+{
+    unsigned char uni[] = {
+        [self ra_hexCharFromInt:((ch >> 12) & 0x0f)],
+        [self ra_hexCharFromInt:((ch >> 8) & 0x0f)],
+        [self ra_hexCharFromInt:((ch >> 4) & 0x0f)],
+        [self ra_hexCharFromInt:(ch & 0x0f)],
+        0
+    };
+    return [NSString stringWithUTF8String:(char*)uni];
+}
+
+- (NSString *)ra_stringByEscapingForJavascriptWithDelimiter:(unichar)delimiter wrapWithDelimiters:(BOOL)wrap
+{
+    NSMutableString *js = [[NSMutableString alloc] init];
+    
+    if (wrap)
+    {
+        [js appendFormat:@"%C", delimiter];
+    }
+    
+    int lastWritePosition = 0;
+    int skipped = 0;
+    NSInteger length = self.length;
+    unichar *chars = malloc(sizeof(unichar) * length);
+    unichar c;
+    [self getCharacters:chars range:NSMakeRange(0, length)];
+    NSString *escapedValue;
+    
+    for (int i = 0; i < length; i++)
+    {
+        c = chars[i];
+        
+        switch (c)
+        {
+            case L'\t':
+                escapedValue = @"\\t";
+                break;
+            case L'\n':
+                escapedValue = @"\\n";
+                break;
+            case L'\r':
+                escapedValue = @"\\r";
+                break;
+            case L'\f':
+                escapedValue = @"\\f";
+                break;
+            case L'\b':
+                escapedValue = @"\\b";
+                break;
+            case L'\\':
+                escapedValue = @"\\\\";
+                break;
+            case 0x0085:
+                escapedValue = @"\\u0085";
+                break;
+            case 0x2028:
+                escapedValue = @"\\u2028";
+                break;
+            case 0x2029:
+                escapedValue = @"\\u2029";
+                break;
+            case L'\'':
+                escapedValue = (delimiter == L'\'') ? @"\\'" : nil;
+                break;
+            case L'"':
+                escapedValue = (delimiter == '"') ? @"\\\"" : nil;
+                break;
+            default:
+                escapedValue = (c <= 0x001f) ? [self ra_unicodeStringForChar:c] : nil;
+                break;
+        }
+        
+        if (escapedValue)
+        {
+            if (skipped > 0)
+            {
+                [js appendString:[self substringWithRange:NSMakeRange(lastWritePosition, skipped)]];
+                skipped = 0;
+            }
+            
+            [js appendString:escapedValue];
+            lastWritePosition = i + 1;
+        }
+        else
+        {
+            skipped++;
+        }
+    }
+    
+    if (skipped > 0)
+    {
+        if (lastWritePosition == 0)
+        {
+            [js appendString:self];
+        }
+        else
+        {
+            [js appendString:[self substringWithRange:NSMakeRange(lastWritePosition, skipped)]];
+        }
+    }
+    
+    free(chars);
+    
+    if (wrap)
+    {
+        [js appendFormat:@"%C", delimiter];
+    }
+    
+    return js;
+}
+
+
+
+@end