How to understand ios try catch mechanism
This article introduces the relevant knowledge of "how to understand the ios try catch mechanism". In the operation of actual cases, many people will encounter such a dilemma, so let the editor lead you to learn how to deal with these situations. I hope you can read it carefully and be able to achieve something!
When developing ios-object-c, many developers do not habitually add try catch, because try catch can only detect some problems such as data out of bounds, but will not detect memory overflow, thread conflicts and other problems, but many developers should encounter network data parsing, if the data format is not correct, it will directly lead to flashback, in order to avoid this, very often will write a very if else statement Writing judgment can solve this kind of problem, but sometimes the data format returned by the backend is different in different languages, and some data types do not match when parsing on the oc side. For example, null in java will be parsed into a character string, and the parsing returned by php is empty. This makes the front-end work is very lack, to do a lot of judgment to avoid such problems, the use of try catch, you can well avoid such problems, only need to make a unified judgment in catch, there is no need to write judgment statements, there is another special advantage of using try catch, that is, when there are data anomalies, when there are some abnormal conditions, app will not flicker There is a qualitative difference in the development experience. Here is an example of try catch
@ try {
/ / Business Code
}
@ catch (NSException * exception) {
/ / exception handling mechanism
}
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