Iphone数组一些基础操作NSArray/NSMutableArray
1 /*******************************************************************************************
2 NSArray
3 *******************************************************************************************/
4
5 /*---------------------------创建数组------------------------------*/
6 //NSArray *array = ［NSArray alloc] initWithObjects:
7 @"One",@"Two",@"Three",@"Four",nil];
8
9 self.dataArray = array;
10 [array release];
11
12 //- (unsigned) Count;数组所包含对象个数；
13 NSLog(@"self.dataArray cound:%d",[self.dataArray count]);
14
15 //- (id) objectAtIndex: (unsigned int) index;获取指定索引处的对象;
16 NSLog(@"self.dataArray cound 2:%@",[self.dataArray objectAtIndex:2]);
17
18
19 /*--------------------------从一个数组拷贝数据到另一数组(可变数级)----------------------------*/
20
21 //arrayWithArray:
22 //NSArray *array1 = ［NSArray alloc] init];
23 NSMutableArray *MutableArray = ［NSMutableArray alloc] init];
24 NSArray *array = [NSArray arrayWithObjects:
25 @"a",@"b",@"c",nil];
26 NSLog(@"array:%@",array);
27 MutableArray = [NSMutableArray arrayWithArray:array];
28 NSLog(@"MutableArray:%@",MutableArray);
29
30 array1 = [NSArray arrayWithArray:array];
31 NSLog(@"array1:%@",array1);
32
33
34 //Copy
35
36 //id obj;
37 NSMutableArray *newArray = ［NSMutableArray alloc] init];
38 NSArray *oldArray = [NSArray arrayWithObjects:
39 @"a",@"b",@"c",@"d",@"e",@"f",@"g",@"h",nil];
40
41 NSLog(@"oldArray:%@",oldArray);
42 for(int i = 0; i < [oldArray count]; i++)
43 {
44 obj = ［oldArray objectAtIndex:i] copy];
45 [newArray addObject: obj];
46 }
47 //
48 NSLog(@"newArray:%@", newArray);
49 [newArray release];
50
51
52 //快速枚举
53
54 //NSMutableArray *newArray = ［NSMutableArray alloc] init];
55 NSArray *oldArray = [NSArray arrayWithObjects:
56 @"a",@"b",@"c",@"d",@"e",@"f",@"g",@"h",nil];
57 NSLog(@"oldArray:%@",oldArray);
58
59 for(id obj in oldArray)
60 {
61 [newArray addObject: obj];
62 }
63 //
64 NSLog(@"newArray:%@", newArray);
65 [newArray release];
66
67
68 //Deep copy
69
70 //NSMutableArray *newArray = ［NSMutableArray alloc] init];
71 NSArray *oldArray = [NSArray arrayWithObjects:
72 @"a",@"b",@"c",@"d",@"e",@"f",@"g",@"h",nil];
73 NSLog(@"oldArray:%@",oldArray);
74 newArray = (NSMutableArray*)CFPropertyListCreateDeepCopy(kCFAllocatorDefault, (CFPropertyListRef)oldArray, kCFPropertyListMutableContainers);
75 NSLog(@"newArray:%@", newArray);
76 [newArray release];
77
78
79 //Copy and sort
80
81 //NSMutableArray *newArray = ［NSMutableArray alloc] init];
82 NSArray *oldArray = [NSArray arrayWithObjects:
83 @"b",@"a",@"e",@"d",@"c",@"f",@"h",@"g",nil];
84 NSLog(@"oldArray:%@",oldArray);
85 NSEnumerator *enumerator;
86 enumerator = [oldArray objectEnumerator];
87 id obj;
88 while(obj = [enumerator nextObject])
89 {
90 [newArray addObject: obj];
91 }
92 [newArray sortUsingSelector:@selector(compare:)];
93 NSLog(@"newArray:%@", newArray);
94 [newArray release];
95
96
97
98 /*---------------------------切分数组------------------------------*/
99
100 //从字符串分割到数组－ componentsSeparatedByString:
101 NSString *string = ［NSString alloc] initWithString:@"One,Two,Three,Four"];
102 NSLog(@"string:%@",string);
103 NSArray *array = [string componentsSeparatedByString:@","];
104 NSLog(@"array:%@",array);
105 [string release];
106
107
108 //从数组合并元素到字符串- componentsJoinedByString:
109 NSArray *array = ［NSArray alloc] initWithObjects:@"One",@"Two",@"Three",@"Four",nil];
110&nbs
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