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This article will explain in detail how to analyze the mismatch of OC types. The content of the article is of high quality, so the editor will share it with you for reference. I hope you will have some understanding of the relevant knowledge after reading this article.

In OC, two different types of objects can also be assigned to each other, such as NSString * s and NSNumber * n. The compiler will not report an error, but will prompt a warning. If b is obtained through NSDictionary or other containers, that is, if you are not sure of the type inside, there is no warning. It's easy to make mistakes.

Sroomb, the result of actual operation

After assignment, the type of s will become the type of b, which in this case is NSNumber, and there won't be any big error when running here. However, if there is something useful to s later, such as calling some unique methods of NSString, but NSNumber is not available, because s has become the type of b, then there will be crash, which can not be found by the method, which is crash, so you must make a type judgment when you are uncertain about the type.

On how to carry out the analysis of OC type mismatch is shared here, I hope the above content can be of some help to you, can learn more knowledge. If you think the article is good, you can share it for more people to see.

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