Hello!
According to documentation, I try to subclass NSTextStorage and use it in text
view:
/*
NSTextStorage is a semi-abstract subclass of NSMutableAttributedString. It
implements change management (beginEditing/endEditing), verification of
attributes, delegate handling, and layout management notification. The one
aspect it does not implement is the actual attributed string storage --- this
is left up to the subclassers, which need to override the two
NSMutableAttributedString primitives:
- (void)replaceCharactersInRange:(NSRange)range withString:(NSString *)str;
- (void)setAttributes:(NSDictionary *)attrs range:(NSRange)range;
*/
So I try to use delegate, to handle all needed events with same functionality:
------------------------ code --------------------------
@implementation MyTextStorage
- (id) init {
self = [super init];
if (self != nil) {
storage = [[NSMutableAttributedString alloc] init];
}
return self;
}
- (void) dealloc {
[storage release];
[super dealloc];
}
- (NSString *) string {
return [storage string];
}
- (void) replaceCharactersInRange:(NSRange)range withString:(NSString *)str {
[storage replaceCharactersInRange:range withString:str];
}
- (void)setAttributes:(NSDictionary *)attrs range:(NSRange)range {
[storage setAttributes:attrs range:range];
}
@end
------------------------ /code --------------------------
It is no matter what I'm use as delegate: NSTextStorage or
NSMutableAttributedString, The result is the same:
---------------- log -------------------
An uncaught exception was raised
*** NSRunStorage, _NSBlockNumberForIndex(): index (18446744073709551615) beyond
array bounds (0)
*** Terminating app due to uncaught exception 'NSRangeException', reason: '***
NSRunStorage, _NSBlockNumberForIndex(): index (18446744073709551615) beyond
array bounds (0)'
---------------- /log -------------------
What I need to do to extend this class ?
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