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1. #CHANGE READONLY DECLARED VARIABLE TO READWRITE LINUX INSTALL#
2. #CHANGE READONLY DECLARED VARIABLE TO READWRITE LINUX UPDATE#
3. #CHANGE READONLY DECLARED VARIABLE TO READWRITE LINUX CODE#

Use this variable, along with $CHOSEN_FEATURE_n$ and $CHOSEN_FEATURE_NUM$, to track the features that your end users select during install and uninstall.Ī similar set of variables exists ( $CHOSEN_INSTALL_FEATURE_LIST$, $CHOSEN_INSTALL_FEATURE_NUM$, $CHOSEN_INSTALL_FEATURE_n$, and $FEATURE_UNINSTALL_LIST$).Likewise if you alter this string in a way that violates feature dependencies or parent-child relationships, you may get a different result when you read back the value of this variable. Hence, if you add a feature that does not exist in the installer, that portion of the $CHOSEN_FEATURE_LIST$ is ignored. Installers interpret the string value of this variable and discard values that do not make sense. You can infer these relationships from the string value of $CHOSEN_FEATURE_LIST$ if you fully understand the relationships between the installer's features and the function of the Choose Install Set panel. You can alter the features that will be installed by altering the value of this variable however, you must understand that the string value of this variable does not clearly represent feature dependencies or parent-child relationships. The $CHOSEN_FEATURE_LIST$ variable is a comma-separated list of all the end user–selected features (short names). If, for example, the end user chooses button 1, this variable is set to 1. The $CHOSEN_DIALOG_BUTTON$ variable reflects the return value set by the end user’s choice in the Show Message dialog box action. These variables have the same value as the Java property file separator. The $/$ and $\$ variables represent platform-specific directory separators, most useful to refer to paths in a platform-independent manner. The $ $ and $:$ variables represent platform-specific path separators. The following variables are standard InstallAnywhere variables: InstallAnywhere includes a number of default variables that store information that is essential to the installation process. Slightly regrettably in terms of data hiding and encapsulation though.Standard InstallAnywhere Variables Standard InstallAnywhere Variables

#CHANGE READONLY DECLARED VARIABLE TO READWRITE LINUX UPDATE#

It will use the declaration in the header file, so subclasses can update the value of the property, while retaining its readonlyness. (in the header file) (readonly) int in the implementation myProperty = m_propertyBackingStore For example (readonly) int in the implementation whatever = methods can then set m_whatever, since it is a member variable.Īnother interesting thing I have realized in the past few days is you can make readonly properties that are writable by subclasses like such: I found it very helpful to read and re-read.Īnother way I've found to work with readonly properties is to use to specify the backing store. When you see the self->_foo you know without ambiguity that _foo is a member variable on this instance.īy the way, discussion of pros and cons of property accessors versus direct ivar access is exactly the kind of thoughtful treatment you'll read in Dr.

#CHANGE READONLY DECLARED VARIABLE TO READWRITE LINUX CODE#

But I prefer using the self+arrow because it makes my code self-documenting. You may be able to omit that, and just use the var name. Using self-> is a way to access a member variable of the object/instance. But you never see that declaration in your original source code file. You can do so even without declaring that underscore-named variable! Xcode is inserting that declaration as part of the build/compile process, so your compiled code will indeed have the variable declaration. The simplest way around this is to directly access the member variable, named with the underscore. The dot notation fails because the compiler stops you from calling a method (the setter) that does not exist. The readonly means simply that no setter method was synthesized, and therefore using the dot notation to set a value fails with a compiler error. That means the backing variable, named with the underscore, is not itself readonly. If the property was declared readonly, no setter is generated. These methods are implicitly called when you use the dot notation (my Object.myMethod). If the property was declared readwrite, Xcode generates a getter method named foo and a setter named setFoo. m file.Īfter declaring a property foo, you can assume Xcode has added a private member variable named with a prefix of underscore: _foo.

No muss, no fuss.Īs of Xcode 4.4 and LLVM Compiler 4.0 (New Features in Xcode 4.4), you need not mess with the chores discussed in the other answers:

Self->_foo = // Notice the underscore prefix of var name. h (strong, nonatomic, readonly) NSString* foo Here's a simpler way: Directly access the private member variable. m file: YourClass (nonatomic, copy) NSString* and others gave correct answers. A common way is to put it in a class extension in the. You need to tell the compiler that you also want a setter.