NSArray和NSMutableArray的用法，nsarray

NSArray和NSMutableArray的用法，nsarray

NSArray是靜態數組，就是它所指向的內容是不可改變的，它指向一段記憶體地區，一旦初始化，不能通過它對該記憶體地區的資料進行修改操作，但是它可以讀資料。

NSMutableArray是動態是NSArray的子類，可以對所指向的記憶體地區內容變更，並可以增加數組內容

NSArray和NSmutableArray的第一個資料的下標為0。

********************************************************************************NSArray ********************************************************************************NSArray *array = ［NSArray alloc] initWithObjects:@"One",@"Two",@"Three",@"Four",nil];self.dataArray = array;[array release];//- (unsigned) Count;數組所包含對象個數；NSLog(@"self.dataArray cound:%d",[self.dataArray count]);//- (id) objectAtIndex: (unsigned int) index;擷取指定索引處的對象;NSLog(@"self.dataArray cound 2:%@",[self.dataArray objectAtIndex:2]); //arrayWithArray:NSArray *array1 = ［NSArray alloc] init];NSMutableArray *MutableArray = ［NSMutableArray alloc] init];NSArray *array = [NSArray arrayWithObjects:      @"a",@"b",@"c",nil];NSLog(@"array:%@",array);MutableArray = [NSMutableArray arrayWithArray:array];NSLog(@"MutableArray:%@",MutableArray);array1 = [NSArray arrayWithArray:array];NSLog(@"array1:%@",array1);//Copy//id obj;NSMutableArray *newArray = ［NSMutableArray alloc] init];NSArray *oldArray = [NSArray arrayWithObjects:      @"a",@"b",@"c",@"d",@"e",@"f",@"g",@"h",nil];NSLog(@"oldArray:%@",oldArray);for(int i = 0; i < [oldArray count]; i++){        obj = ［oldArray objectAtIndex:i] copy]; [newArray addObject: obj];}//    NSLog(@"newArray:%@", newArray);[newArray release];//快速枚舉NSMutableArray *newArray = ［NSMutableArray alloc] init];NSArray *oldArray = [NSArray arrayWithObjects:      @"a",@"b",@"c",@"d",@"e",@"f",@"g",@"h",nil];   NSLog(@"oldArray:%@",oldArray);for(id obj in oldArray){ [newArray addObject: obj];}//    NSLog(@"newArray:%@", newArray);[newArray release];   //Deep copyNSMutableArray *newArray = ［NSMutableArray alloc] init];NSArray *oldArray = [NSArray arrayWithObjects:      @"a",@"b",@"c",@"d",@"e",@"f",@"g",@"h",nil];   NSLog(@"oldArray:%@",oldArray);   newArray = (NSMutableArray*)CFPropertyListCreateDeepCopy(kCFAllocatorDefault, (CFPropertyListRef)oldArray, kCFPropertyListMutableContainers);NSLog(@"newArray:%@", newArray);[newArray release];   //Copy and sortNSMutableArray *newArray = ［NSMutableArray alloc] init];NSArray *oldArray = [NSArray arrayWithObjects:      @"b",@"a",@"e",@"d",@"c",@"f",@"h",@"g",nil];   NSLog(@"oldArray:%@",oldArray);NSEnumerator *enumerator;enumerator = [oldArray objectEnumerator];id obj;while(obj = [enumerator nextObject]){ [newArray addObject: obj];}[newArray sortUsingSelector:@selector(compare:)];NSLog(@"newArray:%@", newArray);[newArray release]; //從字串分割到數組－ componentsSeparatedByString:NSString *string = ［NSString alloc] initWithString:@"One,Two,Three,Four"];NSLog(@"string:%@",string);   NSArray *array = [string componentsSeparatedByString:@","];NSLog(@"array:%@",array);[string release];//從數組合并元素到字串- componentsJoinedByString:NSArray *array = ［NSArray alloc] initWithObjects:@"One",@"Two",@"Three",@"Four",nil];NSString *string = [array componentsJoinedByString:@","];NSLog(@"string:%@",string); //NSArray *array;array = [NSMutableArray arrayWithCapacity:20];//- (void) addObject: (id) anObject;NSMutableArray *array = [NSMutableArray arrayWithObjects:@"One",@"Two",@"Three",nil];[array addObject:@"Four"];NSLog(@"array:%@",array); //-(void) removeObjectAtIndex: (unsigned) index;   NSMutableArray *array = [NSMutableArray arrayWithObjects:@"One",@"Two",@"Three",nil];[array removeObjectAtIndex:1];NSLog(@"array:%@",array); //- (NSEnumerator *)objectEnumerator;從前向後NSMutableArray *array = [NSMutableArray arrayWithObjects:@"One",@"Two",@"Three",nil];NSEnumerator *enumerator;enumerator = [array objectEnumerator];id thingie;while (thingie = [enumerator nextObject]) { NSLog(@"thingie:%@",thingie);}//- (NSEnumerator *)reverseObjectEnumerator;從後向前NSMutableArray *array = [NSMutableArray arrayWithObjects:@"One",@"Two",@"Three",nil];NSEnumerator *enumerator;enumerator = [array reverseObjectEnumerator];id object;while (object = [enumerator nextObject]) { NSLog(@"object:%@",object);}//快速枚舉NSMutableArray *array = [NSMutableArray arrayWithObjects:@"One",@"Two",@"Three",nil];for(NSString *string in array){ NSLog(@"string:%@",string);}//- (id) initWithObjectsAndKeys;NSDictionary *dictionary = ［NSDictionary alloc] initWithObjectsAndKeys:@"One",@"1",@"Two",@"2",@"Three",@"3",nil];NSString *string = [dictionary objectForKey:@"One"];NSLog(@"string:%@",string);NSLog(@"dictionary:%@",dictionary);[dictionary release];//建立NSMutableDictionary *dictionary = [NSMutableDictionary dictionary];//添加字典[dictionary setObject:@"One" forKey:@"1"];[dictionary setObject:@"Two" forKey:@"2"];[dictionary setObject:@"Three" forKey:@"3"];[dictionary setObject:@"Four" forKey:@"4"];NSLog(@"dictionary:%@",dictionary);//刪除指定的字典[dictionary removeObjectForKey:@"3"];NSLog(@"dictionary:%@",dictionary);//將NSRect放入NSArray中NSMutableArray *array = ［NSMutableArray alloc] init];NSValue *value;CGRect rect = CGRectMake(0, 0, 320, 480);   value = [NSValue valueWithBytes:&rect objCType:@encode(CGRect)];[array addObject:value];NSLog(@"array:%@",array);//從Array中提取value = [array objectAtIndex:0];[value getValue:&rect];NSLog(@"value:%@",value);NSFileManager *fileManager = [NSFileManager defaultManager];NSString *home;home = @"../Users/";NSDirectoryEnumerator *direnum;direnum = [fileManager enumeratorAtPath: home];NSMutableArray *files = ［NSMutableArray alloc] init];//枚舉NSString *filename;while (filename = [direnum nextObject]) { if(［filename pathExtension] hasSuffix:@"jpg"]){  [files addObject:filename]; }}//快速枚舉for(NSString *filename in direnum){ if(［filename pathExtension] isEqualToString:@"jpg"]){  [files addObject:filename]; }}NSLog(@"files:%@",files);//枚舉NSEnumerator *filenum;filenum = [files objectEnumerator];while (filename = [filenum nextObject]) { NSLog(@"filename:%@",filename);}//快速枚舉for(id object in files){ NSLog(@"object:%@",object);}  for(NSString *arrayString1 in readArray1) {  //NSLog(@"arrayString1=%@",arrayString1);  NSArray *array1=[arrayString1 componentsSeparatedByString:@"#:)"];     NSString *name1=[array1 objectAtIndex:0];  NSString *page1=[array1 objectAtIndex:1];    [self.array addObject:[[NSMutableDictionary alloc]initWithObjectsAndKeys:name1,@"name",page1,@"page",nil]];    NSString *fileString3=[NSString stringWithFormat:@"%@#:)%@",          name1,page1];  [self.markName addObject:fileString3];   }