Objective-数组操作

/*******************************************************************************************NSArray/*---------------------------创建数组------------------------------*///NSArray *array = [[NSArray alloc] initWithObjects:@"One",@"Two",@"Three",@"Four",nil];self.dataArray = array;[array release];//- (unsigned) Count;数组所包含对象个数；NSLog(@"self.dataArray cound:%d",[self.dataArray count]);//- (id) objectAtIndex: (unsigned int) index;获取指定索引处的对象;NSLog(@"self.dataArray cound 2:%@",[self.dataArray objectAtIndex:2]);/*--------------------------从一个数组拷贝数据到另一数组(可变数级)----------------------------*///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];//快速枚举//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 copy//NSMutableArray *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 sort//NSMutableArray *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];/*---------------------------切分数组------------------------------*///从字符串分割到数组－ componentsSeparatedByString:NSString *string = [[NSString alloc] initWithString:@"One,Two,Three,Four"];NSLog(@"string:%@",string);NSArray *array = [string componentsSeparatedByString:@","];NSLog(@"array:%@",array);[string release];//从数组合并元素到字符串- componentsJoinedByString:NSArray *array = [[NSArray alloc] initWithObjects:@"One",@"Two",@"Three",@"Four",nil];NSString *string = [array componentsJoinedByString:@","];NSLog(@"string:%@",string);/*******************************************************************************************NSMutableArray/*---------------给数组分配容量----------------*///NSArray *array;array = [NSMutableArray arrayWithCapacity:20];/*--------------在数组末尾添加对象----------------*///- (void) addObject: (id) anObject;//NSMutableArray *array = [NSMutableArray arrayWithObjects:@"One",@"Two",@"Three",nil];[array addObject:@"Four"];NSLog(@"array:%@",array);/*--------------删除数组中指定索引处对象----------------*///-(void) removeObjectAtIndex: (unsigned) index;//NSMutableArray *array = [NSMutableArray arrayWithObjects:@"One",@"Two",@"Three",nil];[array removeObjectAtIndex:1];NSLog(@"array:%@",array);/*-------------数组枚举---------------*///- (NSEnumerator *)objectEnumerator;从前向后//NSMutableArray *array = [NSMutableArray arrayWithObjects:@"One",@"Two",@"Three",nil];NSEnumerator *enumerator;enumerator = [array objectEnumerator];id thingie;while (thingie = [enumerator nextObject]) {NSLog(@"thingie:%@",thingie);}//- (NSEnumerator *)reverseObjectEnumerator;从后向前//NSMutableArray *array = [NSMutableArray arrayWithObjects:@"One",@"Two",@"Three",nil];NSEnumerator *enumerator;enumerator = [array reverseObjectEnumerator];id object;while (object = [enumerator nextObject]) {NSLog(@"object:%@",object);}//快速枚举//NSMutableArray *array = [NSMutableArray arrayWithObjects:@"One",@"Two",@"Three",nil];for(NSString *string in array){NSLog(@"string:%@",string);}/*******************************************************************************************NSDictionary/*------------------------------------创建字典------------------------------------*///- (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];/*******************************************************************************************NSMutableDictionary/*------------------------------------创建可变字典------------------------------------*///创建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);//删除指定的字典[dictionary removeObjectForKey:@"3"];NSLog(@"dictionary:%@",dictionary);/*******************************************************************************************NSValue（对任何对象进行包装）