How to use the trace command in Flash - the specific method of using the trace command in Flash

php editor Zimo will introduce how to use the trace command in Flash. The trace command is a very useful debugging tool in Flash, which can help developers quickly locate and solve problems in the code. Through the trace command, we can output the values ​​of variables, the execution order of functions, and the running status of the program. This article will introduce in detail the specific usage and common techniques of the trace command to help you better use the trace command for debugging and improve development efficiency. Let's learn how to use the trace command in Flash!

1. Open Flash and create a new blank file.

2. Right-click on the frame where the code needs to be placed and select [Action].

3. In the action panel that opens, enter trace("How are you"). (Note: How are you is test data and can be defined by yourself).

4. Select [Control]---->[Test Video]---->[Test].

5. The test data [How are you] will be output in the [Output] panel.

6. The above code actually calls the trace() function, which is used to output information to facilitate users to view and debug the program.

7. The form of using the trace function is: trace(parameter 1, parameter 2...) where trace is the function name, () is the syntax for calling the function, () The data is called parameters, and multiple parameters can be passed to the trace() function. Different parameters are separated by commas.

8. There is a newline character after each trace() function output information. In the action panel, enter:

trace("Name: Zhang Xiaosan").

trace("Student ID: 13").

9. Test the above code, we will output the information as shown in the [Output] panel.

Note: In the parameters of the trace() function, the data enclosed in double quotes is called a string. Chinese and English characters are all strings. Double quotes or single quotes should be used in string programming. bracketed.

10. If you want to display multiple pieces of information in one line, you can pass multiple parameters to the trace() function and enter the following content in the action panel:

trace(" Name: Zhang Xiaosan", "Student ID: 13").

11. After testing the code, you will see a line of output with space-delimited information. (Note: When entering the code, separate multiple parameters with commas)

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