[转]:ios NSMutableArray的用法大全

 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
    

 1 //- (NSEnumerator *)objectEnumerator;从前向后
 2     //NSMutableArray *array = [NSMutableArray arrayWithObjects:
 3     @"One",@"Two",@"Three",nil];
 4     NSEnumerator *enumerator;
 5     enumerator = [array objectEnumerator];
 6 
 7     id thingie;
 8     while (thingie = [enumerator nextObject]) {
 9         NSLog(@"thingie:%@",thingie);
10     }
11 
12     //- (NSEnumerator *)reverseObjectEnumerator;从后向前
13     //NSMutableArray *array = [NSMutableArray arrayWithObjects:
14     @"One",@"Two",@"Three",nil];
15     NSEnumerator *enumerator;
16     enumerator = [array reverseObjectEnumerator];
17 
18     id object;
19     while (object = [enumerator nextObject]) {
20         NSLog(@"object:%@",object);
21     }
22 
23     //快速枚举
24     //NSMutableArray *array = [NSMutableArray arrayWithObjects:
25     @"One",@"Two",@"Three",nil];
26     for(NSString *string in array)
27     {
28         NSLog(@"string:%@",string);
29     }　

 

原文地址：http://www.onmoso.com/ios/384.html

posted @ 2013-07-31 09:19  windworship  阅读(809)  评论(0)  编辑  收藏  举报