1. /*---------------------NSArray---------------------------*/  
2. //创建数组  
3. "1"];  
4. "1",@"2",@"3", nil];  
5.        NSArray *array3 = [NSArray arrayWithArray:array2];  
6. "array1 = %@",array1);  
7. "array2 = %@",array2);  
8. "array3 = %@",array3);  
9.          
10. //获取数组内数据个数  
11. int count = [array2 count];  
12. "array2 size is %d",count);  
13.          
14. //访问数组内的数据  
15.        NSString *str1 = [array2 objectAtIndex:0];  
16. "array2 first content is %@",str1);  
17.          
18. //数组中插入数据   返回新的数组  
19. "4"];  
20. "array4 = %@",array4);  
21.          
22. //数组内的数据以制定字符连接  
23. ","];  
24. "str2 = %@",str2);  
25.          
26. //判断数组中是否包含某对象  
27. BOOL b1 = [array4 containsObject:@"4"];  
28. BOOL b2 = [array4 containsObject:@"5"];  
29. "b1 = %d,b2 = %d",b1,b2);  
30.          
31. //取数组内制定对象的索引  
32. int index = [array4 indexOfObject:@"4"];  
33. "index = %d",index);  
34.          
35.        NSString *str3 = [array4 lastObject];  
36. "array4 last object is %@",str3);  
37.          
38. /*-----------------------可变数组NSMutableArray-----------------------------------------*/  
39. //初始化数组 指定数组长度   但可变  
40.        NSMutableArray *mArray1 = [NSMutableArray arrayWithCapacity:5];  
41.          
42. //向数组中添加元素  
43. "aaaa"];  
44. "cccc"];  
45. "mArray1 = %@",mArray1);  
46.          
47. //向指定位置插入元素  
48. "bbbb" atIndex:1];  
49. "dddd" atIndex:[mArray1 count]];  
50. "eeee" atIndex:[mArray1 count]];  
51. "mArray1 = %@",mArray1);  
52.          
53. //移除元素  
54. "eeee"];  
55. "mArray1 = %@",mArray1);  
56.        [mArray1 removeObjectAtIndex:[mArray1 count]-1];  
57. "mArray1 = %@",mArray1);  
58. "bbbb",@"cccc", nil];  
59.        [mArray1 removeObjectsInArray:array5];  
60. "mArray1 = %@",mArray1);  
61.          
62. //向数组内插入数组  
63. "aaaa",@"aaaa", nil];  
64. "bbbb"];  
65. "mArray2 = %@",mArray2);  
66.        [mArray2 addObjectsFromArray:array4];  
67. "mArray2 = %@",mArray2);  
68.          
69. //替换元素  
70. "5"];  
71. "mArray2 = %@",mArray2);  
72.          
73. //遍历数组  常规方法:性能较低  
74. "a",@"b",@"c",@"d",@"e", nil];  
75. int len = [array6 count];  
76. for (int i=0; i<len; i++) {  
77.            NSString *value = [array6 objectAtIndex:i];  
78. "array6 %d content is %@",i,value);  
79.        }  
80.          
81. //枚举遍历  相当于java中的增强for循环  
82. for (NSString *string in array6) {  
83. "array6 content is %@",string);  
84.        }  
85.          
86. "-----------------------");  
87.          
88. //当不确定数组元素类型时  
89. for(id string in array6){  
90. "array6 content is %@",string);  
91.        }  
92.