Objective-C 2.0程序设计 习题官方答案

18-1 Simple way « on: January 23, 2010, 10:04:14 AM » AddressCard.h Code: (Objective-C) view plaincopy to clipboardprint? #import <Foundation/Foundation.h> #define FN @"First Name" #define LN @"Last Name" @interface AddressCard: NSObject { NSMutableDictionary *fields; } @property (copy, nonatomic) NSMutableDictionary *fields; -(AddressCard *) init; -(AddressCard *) intiWithFirstName: (NSString *) fn andLastName: (NSString *) ln; -(void) setFirstName: (NSString *) fn andLastName: (NSString *) ln; -(void) setField: (NSString *) newField; -(void) setField: (NSString *) newField withContents: (NSString *) newContents; -(NSComparisonResult) compareNames: (id) element; -(void) print; -(void) dealloc; @end AddressCard.m Code: (Objective-C) view plaincopy to clipboardprint? #import "AddressCard.h" @implementation AddressCard @synthesize fields; -(void) print { NSLog (@"=============================================="); NSLog (@"| |"); NSLog (@"| %-41s |", [[NSString stringWithFormat:@"%@ %@", [fields valueForKey: FN], [fields valueForKey: LN]] UTF8String]); NSLog (@"| |"); for(NSString *key in fields) if([key caseInsensitiveCompare: FN] != NSOrderedSame && [key caseInsensitiveCompare: LN] != NSOrderedSame) NSLog (@"| %-15s: %-24s |", [key UTF8String], [[fields valueForKey: key] UTF8String]); NSLog (@"| |"); NSLog (@"| |"); NSLog (@"| |"); NSLog (@"| O O |"); NSLog (@"=============================================="); } -(AddressCard *) init { [self initWithFirstName: @"" andLastName: @""]; return self; } -(AddressCard *) initWithFirstName:(NSString *) fn andLastName:(NSString *) ln { self = [super init]; if(self) { fields = [[NSMutableDictionary alloc] init]; [fields setObject: fn forKey: FN]; [fields setObject: ln forKey: LN]; } return self; } -(void) setFirstName:(NSString *) fn andLastName:(NSString *) ln { [fields setObject: fn forKey: FN]; [fields setObject: ln forKey: LN]; } -(void) setField: (NSString *) newField withContents: (NSString *) newContents { [fields setObject: newContents forKey: newField]; } -(void) setField: (NSString *) newField { [self setField: newField withContents: nil]; } -(NSComparisonResult) compareNames: (id) element { NSComparisonResult result; result = [[self.fields objectForKey: LN] caseInsensitiveCompare: [[element fields] objectForKey: LN]]; if (result == NSOrderedSame) result = [[self.fields objectForKey: FN] caseInsensitiveCompare: [[element fields] objectForKey: FN]]; return result; } -(void) dealloc { [fields release]; [super dealloc]; } @end AddressBook.h Code: (Objective-C) view plaincopy to clipboardprint? #import <Foundation/Foundation.h> #import "AddressCard.h" @interface AddressBook: NSObject <NSCopying> { NSString *bookName; NSMutableArray *book; } @property (retain, nonatomic) NSString *bookName; @property (copy, nonatomic) NSMutableArray *book; -(id) initWithName: (NSString *) name; -(void) addCard: (AddressCard *) theCard; -(NSMutableArray *) lookup: (NSString *) theName; -(BOOL) removeName: (NSString *) theName; -(int) entries; -(void) list; -(void) sort; -(void) dealloc; @end AddressBook.m Code: (Objective-C) view plaincopy to clipboardprint? #import "AddressBook.h" @implementation AddressBook; @synthesize book, bookName; -(id) initWithName: (NSString *) name { self = [self init]; if (self) { bookName = [[NSString alloc] initWithString: name]; book = [[NSMutableArray alloc] init]; } return self; } -(void) addCard: (AddressCard *) theCard { if(![book containsObject: theCard]) [book addObject: theCard]; } -(int) entries { return [book count]; } -(void) list { NSLog (@"========= Contents of: %@ =============", bookName); for ( AddressCard *theCard in book ) NSLog (@" %@", [NSString stringWithFormat:@"%@ %@", [[theCard fields] valueForKey: FN], [[theCard fields] valueForKey: LN]]); NSLog (@"==========================================="); } -(NSMutableArray *) lookup: (NSString *) theName { NSMutableArray *result = [NSMutableArray array]; for (AddressCard *nextCard in book) { for(NSString *key in nextCard.fields) if ([[nextCard.fields valueForKey: key] rangeOfString: theName options: NSCaseInsensitiveSearch].length) { [result addObject: nextCard]; break; } if(![result containsObject: nextCard]) if ([[NSString stringWithFormat: @"%@ %@", [nextCard.fields valueForKey: FN], [nextCard.fields valueForKey: LN]] compare: theName] == NSOrderedSame) [result addObject: nextCard]; } if([result count]) return result; return nil; } -(BOOL) removeName: (NSString *) theName { NSMutableArray *result = [self lookup: theName]; if([result count] != 1) return NO; [book removeObject: [result objectAtIndex: 0]]; return YES; } -(void) sort { [book sortUsingSelector: @selector (compareNames:)]; } -(void) dealloc { [bookName release]; [book release]; [super dealloc]; } -(id) copyWithZone: (NSZone *) zone { AddressBook *newBook = [[AddressBook allocWithZone: zone] initWithName: @""]; newBook.book = [book mutableCopy]; return newBook; } //This was added at a later date. If you intend to read the posts bellow imagine this didn't exist until my 4th post here. -(void) setBook: (id) nbook { if(book) [book release]; book = [nbook mutableCopy]; } @end main.m Code: (Objective-C) view plaincopy to clipboardprint? #import <Foundation/Foundation.h> #import "AddressCard.h" #import "AddressBook.h" int main (int argc, char *argv[]) { NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init]; NSString *fn = @"Julia"; NSString *ln = @"Baker"; AddressCard *card1 = [[AddressCard alloc] initWithFirstName: fn andLastName: ln]; NSString *fn2 = @"Joanna"; NSString *ln2 = @"Baker"; AddressCard *card2 = [[AddressCard alloc] initWithFirstName: fn2 andLastName: ln2]; NSString *fn3 = @"Thomas"; NSString *ln3 = @"Green"; AddressCard *card3 = [[AddressCard alloc] initWithFirstName: fn3 andLastName: ln3]; NSString *fn4 = @"George"; NSString *ln4 = @"Anderson"; AddressCard *card4 = [[AddressCard alloc] initWithFirstName: fn4 andLastName: ln4]; NSString *fn5 = @"Luke"; NSString *ln5 = @"Skywalker"; AddressCard *card5 = [[AddressCard alloc] initWithFirstName: fn5 andLastName: ln5]; AddressBook *book1 = [[AddressBook alloc] initWithName: @"MyBook"]; [book1 addCard: card1]; [book1 addCard: card2]; [book1 addCard: card3]; [book1 addCard: card4]; [book1 sort]; [book1 list]; AddressBook *book2 = [book1 copy]; book2.bookName = @"MyBook2"; //Testin