rename standardValueWithTypeCode -> mj_standardValueWithTypeCode (#776)

Author: Neeeo

MJExtension/NSObject+MJKeyValue.m

@@ -18,7 +18,7 @@
 
 @implementation NSDecimalNumber(MJKeyValue)
 
-- (id)standardValueWithTypeCode:(NSString *)typeCode {
+- (id)mj_standardValueWithTypeCode:(NSString *)typeCode {
     // 由于这里涉及到编译器问题, 暂时保留 Long, 实际上在 64 位系统上, 这 2 个精度范围相同,
     // 32 位略有不同, 其余都可使用 Double 进行强转不丢失精度
     if ([typeCode isEqualToString:MJPropertyTypeLongLong]) {
@@ -187,7 +187,7 @@ - (instancetype)mj_setKeyValues:(id)keyValues context:(NSManagedObjectContext *)
                     if (decimalValue == NSDecimalNumber.notANumber) {
                         value = @(0);
                     }else if (propertyClass != [NSDecimalNumber class]) {
-                        value = [decimalValue standardValueWithTypeCode:type.code];
+                        value = [decimalValue mj_standardValueWithTypeCode:type.code];
                     } else {
                         value = decimalValue;
                     }