iOS study Day10-歌曲列表

//定义三个新类：Song、PlayList和MusicCollection。

//Song对象包含着关于特定歌曲的信息，比如歌曲名songName、艺术家artist、专辑album、歌曲长度length等；

//PlayList对象包含播放列表名称和一个歌曲的集合；

//MusicCollection对象包含PlayList集合，它包含一个名为Library的主播放列表，这个列表包含该集合中的所有歌曲。

//

//定义上述三个类，并编写方法实现下列功能：

//a.创建一个Song对象，并设置其信息。

//b.创建一个PlayList对象，并对播放列表添加和删除歌曲。

//添加：如果一首歌曲不在主列表中，那么将其添加进去。

//c.从主播放列表删除歌曲：确保从主播放列表中删除一首歌时，也要从音乐集合中的其他播放列表中删除此歌曲。

//d.创建一个MusicCollection对象，并对该集合添加和删除播放列表。

//e.搜索并显示关于所有歌曲、播放列表和整个音乐集合的信息。

//f.确保所有你定义的类都不产生内存泄漏。

//g.实现排序和模糊查找功能。

#import <Foundation/Foundation.h>#import "PlayList.h"#import "MusicCollection.h"int main(int argc, const char * argv[]){    @autoreleasepool    {        Song* song1 = [[[Song alloc] initWithName:@"风往北吹" artist:@"孙楠"album:@"拯救" length: 430] autorelease];        Song* song2 = [[[Song alloc] initWithName:@"东京爱情故事" artist:@"匿名" album:@"未知" length:440] autorelease];        Song* song3 = [[[Song alloc] initWithName:@"花田错" artist:@"王力宏" album:@"改变自己" length:380] autorelease];        Song* song4 = [[[Song alloc] initWithName:@"明天你是否依然爱我" artist:@"未知" album:@"未知" length:290] autorelease];        Song* song5 = [[[Song alloc] initWithName:@"捡肥皂" artist:@"某某" album:@"IOS不得了" length:315] autorelease];        Song* song6 = [[[Song alloc] initWithName:@"逆光" artist:@"孙燕姿" album:@"逆光" length:342426430] autorelease];        Song* song7 = [[[Song alloc] initWithName:@"相约98" artist:@"孙楠" album:@"拯救" length:342423430] autorelease];        Song* song8 = [[[Song alloc] initWithName:@"捡肥皂" artist:@"某某" album:@"IOS不得了" length:372423430] autorelease];                PlayList * pl1 = [[[PlayList alloc] initWithName:@"list爱情圣地"] autorelease];        [pl1 addSongtoList:song1];        [pl1 addSongtoList:song2];        [pl1 addSongtoList:song3];        [pl1 addSongtoList:song4];        [pl1 addSongtoList:song5];                        PlayList * pl2 = [[[PlayList alloc] initWithName:@"list新不了情"] autorelease];        [pl2 addSongtoList:song6];        [pl2 addSongtoList:song7];        [pl2 addSongtoList:song8];                PlayList * pl3 = [[[PlayList alloc] initWithName:@"listiOS还行"] autorelease];        [pl3 addSongtoList:song5];        [pl3 addSongtoList:song7];        [pl3 addSongtoList:song8];                [pl1 description];                //排序        [pl1 sortList];                [pl2 description];        [pl3 description];                        [pl1 removeSongFromList:song2];                MusicCollection *mc = [[[MusicCollection alloc] init] autorelease];                //主列表只有一个，系统会判断如果有主列表则将其清空后再添加，如果列表在副歌列表则将其移动至主列表        [mc addPlaylistToSet2:pl1];        [mc addPlaylistToSet2:pl2];        [mc addPlaylistToSet2:pl3];        [mc addPlaylistToSet:pl2];        [mc addPlaylistToSet:pl1];                //模糊查找        [mc serchForSongName:@"花"];         //c.从主播放列表删除歌曲：确保从主播放列表中删除一首歌时，也要从音乐集合中的其他播放列表中删除此歌曲。        [mc removeSongFromSet:song5];    }    return 0;}

#import <Foundation/Foundation.h>#import <Cocoa/Cocoa.h>@interface Song : NSObject@property (nonatomic, copy) NSString* songName;@property (nonatomic, copy) NSString* artist;@property (nonatomic, copy) NSString* album;@property (nonatomic, assign) long length;-(void) SetName:(NSString*)sname         artist:(NSString*)art          album:(NSString*)alb         length:(long)len;-(id) initWithName:(NSString*)sname            artist:(NSString*)art             album:(NSString*)alb            length:(long)len;-(BOOL) isEqualTo:(Song*)thesong;-(NSString*)description;-(NSComparisonResult)sort:(Song*) song2;-(BOOL)hasWord:(NSString*)keyword;@end

#import "Song.h"@implementation Song@synthesize songName,album,artist,length;-(void) SetName:(NSString*)sname         artist:(NSString*)art          album:(NSString*)alb         length:(long)len{    songName=sname;    album = alb;    artist = art;    length = len;    }-(id) initWithName:(NSString*)sname            artist:(NSString*)art             album:(NSString*)alb            length:(long int)len{    if (self=[super init]) {        [self SetName:sname artist:art album:alb length:len];    }    return self;}- (void)dealloc{    songName =nil;    artist = nil;    album = nil;    [super dealloc];}-(BOOL) isEqualTo:(Song*)theSong{    if ([theSong.songName isEqualToString:self.songName ] &&         [theSong.artist isEqualToString:self.artist ] &&         [theSong.album isEqualToString:self.album] &&         theSong.length == self.length)    {        return true;    }    return false;}-(NSString*)description{    return [NSString stringWithFormat:@"%@ @ %@ from %@ long:%li",songName,artist,album,length];}-(NSComparisonResult)sort:(Song*) song2{    if (self.length > song2.length) {        return NSOrderedDescending;    } else if (self.length < song2.length){        return NSOrderedAscending;    }    return NSOrderedSame;//    if ([songName compare:song2.songName]>0) {//        return NSOrderedDescending;//    } else if ([songName compare:song2.songName]<0){//        return NSOrderedAscending;//    }//    return NSOrderedSame;}-(BOOL)hasWord:(NSString*)keyword{    if ([songName rangeOfString:keyword].length >0 ) {        return YES;    }    return NO;}@end

#import <Foundation/Foundation.h>#import <Cocoa/Cocoa.h>#import "Song.h"@interface PlayList : NSObject@property (nonatomic,retain) Song* song;@property (nonatomic,copy) NSString* name;@property (nonatomic,retain) NSMutableArray* songlist;-(id)initWithName:(NSString*)listname;-(void)addSongtoList:(Song*)theSong;-(void)removeSongFromList:(Song*)theSong;-(void)description;-(void)sortList;-(void)serchForSongName:(NSString*) keyword;@end

#import "PlayList.h"@implementation PlayList@synthesize song,name,songlist;-(id)initWithName:(NSString*)listname{    if (self=[super init]) {        self.name = listname;        self.songlist = [[[NSMutableArray alloc] init] autorelease];    }    return self;}-(void)addSongtoList:(Song*)theSong{    for (Song * song1 in songlist)    {        if ([song1 isEqualTo:theSong]) {            NSLog(@"歌曲:%@ 已存在！添加失败",theSong.songName);            return;        }    }    [songlist addObject:theSong];    NSLog(@"歌曲：%@，添加成功！", theSong.songName);    return;    }-(void)removeSongFromList:(Song*)theSong{    for(Song * song1 in songlist)    {        if([song1 isEqualTo:theSong])        {            [songlist removeObject:song1];            NSLog(@"remooved \"%@\"from %@!",song1.songName ,self.name);            return;        }    }}-(void)description{    NSLog(@"列表：%@,所含歌数：%li", name, songlist.count );    NSLog(@"---------------");    for( Song* song1 in songlist)        NSLog(@"%@",[song1 description]);}-(void)sortList{    [songlist sortUsingSelector:@selector(sort:)];    NSLog(@"排序后：\n");    [self description];}-(void)serchForSongName:(NSString*) keyword{    NSLog(@"在%@中符合查找标准'%@'的歌曲有：\n",name,keyword);        for (Song* song1 in songlist)    {        if ([song1 hasWord:keyword])            NSLog(@"%@",song1.songName);    }    NSLog(@"--------------");    }@end

#import <Foundation/Foundation.h>#import "PlayList.h"@interface MusicCollection : NSObject@property (nonatomic, copy) PlayList* playlist;@property (nonatomic, retain) NSMutableSet* playSet;@property (nonatomic, retain) NSMutableSet* playSet2;-(void)addPlaylistToSet:(PlayList* )theList;-(void)addPlaylistToSet2:(PlayList* )theList;-(void)removePlaylist;-(void)removePlaylist2;-(void)removePlaylist2:(PlayList*)thelist;-(void)removeSongFromSet:(Song* )song1;-(void)serchForSongName:(NSString*) keyword;@end

#import "MusicCollection.h"@implementation MusicCollection@synthesize playlist,playSet,playSet2;-(void)addPlaylistToSet:(PlayList* )theList{    if (playSet.count == 0) {        [playSet addObject:theList];        playlist = theList;        NSLog(@"%@添加至主播放列表！",theList.name);    } else {        [self removePlaylist];        [self addPlaylistToSet:theList];        playlist = theList;        [self removePlaylist2:theList];    }    return;}-(void)addPlaylistToSet2:(PlayList* )theList{        [playSet2 addObject:theList];        NSLog(@"%@添加至副播放列表！",theList.name);        return;}-(void)removePlaylist{    [playSet removeAllObjects];    NSLog(@"已清空播放列表。");    return;}-(void)removePlaylist2{    [playSet2 removeAllObjects];    NSLog(@"已清空播放列表。");    return;}-(void)removePlaylist2:(PlayList*)thelist{    if ([playSet2 containsObject:thelist]) {        [playSet2 removeObject:thelist];        NSLog(@"移除%@从副歌列表",thelist.name);    }}-(void)removeSongFromSet:(Song* )song1{    [playlist removeSongFromList:song1];    for (PlayList* playlist2 in playSet2)    {        [playlist2 removeSongFromList:song1];    }}-(void)serchForSongName:(NSString*) keyword{    [playlist serchForSongName:keyword];    for (PlayList* list2 in playSet2)        [list2 serchForSongName:keyword];}-(id)init{    if (self = [super init]) {        playSet = [[[NSMutableSet alloc] init] autorelease];        playSet2 = [[[NSMutableSet alloc] init] autorelease];        NSLog(@"添加Set成功！");    }        return self;}@end