Indicator for number of items in an array....

Question

Hi,
Does anyone know how to display series of dots in possibly a UILabel field - the number of dots represent - let's say - the number of items in an NSArray?
Sam

Answer 1

Shnaps wrote:
If I am looking for a list of methods that return autoreleased (or non-autoreleased) objects, where would I look? I worry about leaks!
That's a good thing to worry about, Sam.. Tells us you have the correct mixture of paranoia and obsessive compulsive behavior to be a great programmer.
You don't need a list if you remember this:
You take ownership of an object if you create it using a method whose name begins with “alloc” or “new” or contains “copy” (for example, alloc, newObject, or mutableCopy), or if you send it a retain message. You are responsible for relinquishing ownership of objects you own using release or autorelease. Any other time you receive an object, you must not release it.
Class methods other than alloc, etc. that return an instance of the class ("convenience" methods) and instance methods like stringByReplacingOccurrencesOfString:withString: return objects you didn't create. You don't own those objects unless you retain them. When you don't own an object, you must assume that the owner will take care of releasing it. For practical purposes, you may assume these objects are autoreleased. They may stay around longer, but that's none of our business. We can't assume they'll exist after the end of the current event cycle.
Note also that when you use alloc to create an object (that you therefore own), you usually also init the object. Often you'll have a choice between creating your own object and obtaining one from a convenience method. In that case, the convenience method will have a name similar to the corresponding init. E.g.:
// NSString convenience methods:
+ (id)string // Returns an empty string
+ (id)stringWithString:(NSString *)aString // Returns a string created by copying the characters from another given string.
+ (id)stringWithFormat:(NSString *)format, ... // Returns a string created by using a given format ...
// inits for NSString objects we alloc'ed
- (id)init // Returns an initialized NSString object that contains no characters.
- (id)initWithString:(NSString *)aString // Returns an NSString object initialized by copying the characters from another given string.
- (id)initWithFormat:(NSString *)format ... // Returns an NSString object initialized by using a given format
Lastly, do you know what famous programmer wrote these words?:
The key to all of the above is under Memory Management Rules in the +Memory Management Programming Guide for Cocoa+. Once you grok that page, most of your memory management problems will be over.
Do you feel up to reviewing this page: [http://discussions.apple.com/message.jspa?messageID=10033394#10033394]?
- Ray