How can I automatically add properties in Objective-C?
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02-07-2019 - |
Question
When adding new properties to classes, I find myself typing the same things over and over in xcode:
add TYPE *NAME;
(in .h interface)add @property (nonatomic, retain) TYPE *NAME;
(in .h)add @synthesize NAME;
(in .m)add [NAME release];
(in .m dealloc)
(I'm in a non-garbage collected environment.)
How can I do this automatically?
Solution
That sounds about right. IIRC, the Objective-C 2.0 doc says you might be able to leave out step #1, but otherwise I don't know of any shortcuts.
You could probably write a user script to do so within Xcode. See http://www.mactech.com/articles/mactech/Vol.23/23.01/2301XCode/index.html.
OTHER TIPS
According to the Developer Documentation in 64bit runtimes you can leave out step 1.
You could look at Andrew Pang's RMModelObject - I haven't used it, but it acts as a object base class that simplifies model creation.
I haven't used it, but here's some of what's highlighted in the readme:
- no need to declare instance variables,
- no need to write accessor methods,
- free NSCopying protocol support (
-copyWithZone:
),- free NSCoding protocol support (
-initWithCoder:
,-encodeWithCoder:
),- free
-isEqual:
and -hash` implementation,- no need to write
-dealloc
in most cases.
Here's another solution which I modified from this article (also see the initial article)
The version in the blog was searching for variables outside of the variable declaration block and was matching method names too. I have done a crude fix to only search for variables before the first '}'. This will break if there are multiple interface declarations in the header file.
I set the output to "Replace Document Conents" and input as "Entire Document" ....
#!/usr/bin/python
thisfile = '''%%%{PBXFilePath}%%%'''
code = '''%%%{PBXAllText}%%%'''
selmark = '''%%%{PBXSelection}%%%'''
import re
if thisfile.endswith('.h'):
variableEnd = code.find('\n', code.find('}'))
properties = []
memre = re.compile('\s+(?:IBOutlet)?\s+([^\-+@].*? \*?.*?;)')
for match in memre.finditer(code[:variableEnd]):
member = match.group(1)
retain = member.find('*') != -1 and ', retain' or ''
property = '@property (nonatomic%s) %s' % (retain,member)
if code.find(property) == -1:
properties.append(property)
if properties:
print '%s\n\n%s%s%s%s' % (code[:variableEnd],selmark,'\n'.join(properties),selmark,code[variableEnd:])
elif thisfile.endswith('.m'):
headerfile = thisfile.replace('.m','.h')
properties = []
retains = []
propre = re.compile('@property\s\((.*?)\)\s.*?\s\*?(.*?);')
header = open(headerfile).read()
for match in propre.finditer(header):
if match.group(1).find('retain') != -1:
retains.append(match.group(2))
property = '@synthesize %s;' % match.group(2)
if code.find(property) == -1:
properties.append(property)
pindex = code.find('\n', code.find('@implementation'))
if properties and pindex != -1:
output = '%s\n\n%s%s%s' % (code[:pindex],selmark,'\n'.join(properties),selmark)
if retains:
dindex = code.find('\n', code.find('(void)dealloc'))
output += code[pindex:dindex]
retainsstr = '\n\t'.join(['[%s release];' % retain for retain in retains])
output += '\n\t%s' % retainsstr
pindex = dindex
output += code[pindex:]
print output
There is Kevin Callahan's Accessorizer. From the web page:
Accessorizer selects the appropriate property specifiers based on ivar type - and can also generate explicit accessors (1.0) automagically ... but Accessorizer does much, much more ...