Foundation Kit

1.NSRange

typedef struct _NSRange

{

    unsigned int location;

    usingned int length;

}NSRange;

三种创建NSRange的方法：

  1.NSRange range;

      range.location = 17;

      range.length = 4;

  2.NSRange range = {17,4};

  3.NSRange range = NSMakeRange(17,4);

2.NSPoint NSSize NSRect

typedef struct _NSPoint
{
  float x;
  float y;
}NSPoint;

typedef struct _NSSize
{
  float width;
  float height;
}NSSize;

typedef struct _NSRect
{
  NSPoint origin;
  NSSize size;
}NSRect;

创建方法:NSMakePoint();NSMakeSize();NSMakeRect();

//以上几个数据类型不是对象而是struct，原因是因为满足性能需求。

3.NSString NSMutableString

创建方法:

+ (id)stringWithFormat:(NSString *)format, ...

NSString *height;
height = [NSString initWithFormat:@"Your height is %d feet",5];

创建方法:

NSMutableString *string;

string = [NSMutableString stringWithCapacity:42];

4.NSArray NSMutableArray

用来存储Objective-C的对象，而不能存储C语言中的基本数据类型.

创建方法:

   1:  + (id)arrayWithObjects:(id)firstObj, ...

   2:   

   3:  NSArray *array;

   4:  array = [NSArray arrayWithObjects:@"one",@"two",@"three",nil];

5.NSEnumerator(Tiger系统)

NSEnumerator *enumerator
enumerator = [array objectEnumerator];

id thingie;
while(thingie = [enumerator nextObject])
{
    NSLog(@"i found %@",thingie);
}

5.1快速枚举

for(NSString *string in array)
{
    NSLog(@"i found %@",string);
}

6.NSDictionary

创建方法：

+(id)dictionaryWithObjectAndKeys:(id)fristObject,...;

添加元素：

-(void)setObject:(id)anObject forkey:(id)akey;

(fuck!!写到这，windows live writer报错，后面写的都没保存…)

7.NSNumber

8.NSValue

9.NSNull

Wangkeke 2012-04-22 16:58 发表评论