Safe parsing method for IOS (Iphone Operating System) dictionary

Abstract

The invention relates to a safe parsing method for an IOS (Iphone Operating System) dictionary. The method comprises the following steps that: inputting dictionary parsing data: firstly, judging whether the dictionary parsing data is a basic data type or not, secondly, judging whether a default value is required or not, if the default value is required, storing the default value, then, judging whether an input value is empty or not, and carrying out further parsing when the input value is not empty; during further parsing, firstly, judging whether the input is a category type or not, if the input is the category type, further judging whether the category type is in the presence or not, and otherwise, further judging whether a basic data type function is in the presence or not; and when a judgment result shows that the category type and the basic data type function are both in the presence, continuously carrying out parsing, i.e., calling a parsing algorithm to convert the dictionary parsing data into OC data, outputting a parsing value if the dictionary parsing data is successfully converted into the OC data, if the dictionary parsing data fails to be converted into the OC data, judging whether the default value is in the presence or not, outputting the default value if the default value is in the presence, and otherwise, outputting a null value. By use of the method, when theOC data is obtained by parsing, reliability is good, safety is high, an App is effectively protected, the App is not influenced by wrong data, program crash is effectively avoided, and data safety isimproved.

Description

technical field [0001] The invention relates to the technical field of data analysis returned by a server, in particular to a method for safely analyzing an iOS dictionary. Background technique [0002] The app needs to interact with the server to update data and obtain resources. Then, the server returns data to the client in two formats: json format and XML format (except for file downloads). App receives the data returned by the server and needs to parse it into OC data before using it. During parsing, erroneous data may appear. For example: [0003] When we use the json format to transfer data, we often need to parse the data from the dictionary, but many times the data may not be sent in the format we expected. For example, sending an empty string may be an NSNULL or an @ "", send a long integer, which may be a string object, or an NSNumber. At this time, if we call a method that does not match the type, it is likely to crash, so we need to be safe when parsing the d...

AI Technical Summary

Problems solved by technology

[0003] When we use the json format to transfer data, we often need to parse the data from the dictionary, but many times the data may not be sent in the format we expected. For example, sending an empty string may be an NSNULL or an @ "", send a long integer, which may be a string object, or an NSNumber. At this time, if we call a method that does not match the type, it is likely to crash, so we need to be safe when parsing the data Judgment, maintain good compatibility and robustness

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