NSArray详解

- (NSUInteger)count;

获取NSArray中对象的个数

- (id)objectAtIndex:(NSUInteger)index;

获取NSArray中index位置的对象

- (NSArray *)arrayByAddingObject:(id)anObject;

把anObject添加到数组的末尾

- (NSArray *)arrayByAddingObjectsFromArray:(NSArray *)otherArray;

把otherArray数组中的对象添加盗数组的末尾

 - (NSString *)componentsJoinedByString:(NSString *)separator;

把数组中的元素以separator为分割拼接起来组成一个NSString     

- (BOOL)containsObject:(id)anObject;

判断anObject是否在数组中     

- (NSString *)description;

对数组中对象的描述，可以输出数组中的对象(待进一步确定)    

- (NSString *)descriptionWithLocale:(id)locale;

- (NSString *)descriptionWithLocale:(id)locale indent:(NSUInteger)level;

- (id)firstObjectCommonWithArray:(NSArray *)otherArray;

返回NSArray和otherArray中第一个相同的对象

+ (id)arrayWithObjects:(constid [])objects count:(NSUInteger)cnt;

NSString *string[5];string[0] = @"First";string[1] = @"Second";string[2] = @"Third";string[3] = @"Forth";    NSArray *array = [NSArray arrayWithObjects:string count:3];输出结果：First, Second, Third

- (void)getObjects:(id __unsafe_unretained [])objects range:(NSRange)range;

从数组objects中取出对应NSRange的数据，range中的数据表示从range.location开始到range.length的元素

NSArray *mArray = [NSArray arrayWithObjects:@"1", @"2", @"3", @"4", @"5", @"6", @"7", @"8", @"9", nil];id *objects;NSRange range = NSMakeRange(2, 3);objects = malloc(sizeof(id) * range.length);[mArray getObjects:objects range:range];for (NSInteger i = 0; i < range.length; i++){    NSLog(@"objects: %@", objects[i]);}free(objects);

- (NSUInteger)indexOfObject:(id)anObject inRange:(NSRange)range;

在整个数组中,在range范围内的anObject对象的索引位置

- (NSEnumerator *)objectEnumerator;

顺序获取数组的NSEnumerator

- (NSEnumerator *)reverseObjectEnumerator;

倒序获取数组的NSEnumerator

NSEnumerator *enumerator = [mArray objectEnumerator];id object;while((object = [enumerator nextObject])){    NSLog(@"object:%@",object);}