Can I ask which version I should be using, in my older apps I seem to be using "B" but when I look at a lot of examples online I am seeing a lot of versions that look like "A".
// A
- (id)initWithCoder:(NSCoder *)decoder {
self=[super initWithCoder:decoder];
if(self) {
...
OR
// B
- (id)initWithCoder:(NSCoder *)decoder {
self=[super init];
if(self) {
...
Depends on whether the superclass conforms to the NSCoding
protocol or not. If it does, you must call [super initWithCoder:decoder]
. If it does not, you must call the superclass' designated initializer.
For example, if your class is a direct subclass of NSObject
, you would call [super init]
, NSObject
's designated initializer, since NSObject
does not conform to the NSCoding
protocol.
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