- 1). Open the "implementation" file for your Object-C program. This is the file that creates the code for all the methods in your program, including the accessor methods.
- 2). Type the following line of code, substituting the "(int)" and "variable" for the actual data type and variable name you are affecting by your custom accessor method:
-(int)variable{
For example, if you have a "float" variable called "fraction," you would type this line:
-(float)fraction{ - 3). Type your custom accessor algorithm, followed by an ending brace to signify completion of your accessor method. The normal accessor method contains a single line of code that merely returns the value of the variable:
return variable;
Thus the original accessor method appears as:
-(int)variable{
return variable;
}
Now, suppose you want to take the value of an instance variable and multiply it by 100. For example, your instance variable might be a "float" number (which contains decimal places) called "percent." Whenever you interact with that variable, you want the percent treated as an integer. Thus, 0.67 is to become 67. Your entire custom accessor method might look like this:
-(float)oldpercent{
int newpercent = (int) oldpercent *100;
return newpercent;
}
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