1. //NSArray *array = ［NSArray alloc] initWithObjects:
   
2.     @"One",@"Two",@"Three",@"Four",nil];
   
3. 
   
4.     self.dataArray = array;
   
5.     [array release];
   
6. 
   
7.     //- (unsigned) Count;数组所包含对象个数；
   
8.     NSLog(@"self.dataArray cound:%d",[self.dataArray count]);
   
9. 
   
10.     //- (id) objectAtIndex: (unsigned int) index;获取指定索引处的对象;
    
11.     NSLog(@"self.dataArray cound 2:%@",[self.dataArray objectAtIndex:2]);
    
12. 
    
13.     //arrayWithArray:
    
14.     //NSArray *array1 = ［NSArray alloc] init];
    
15.     NSMutableArray *MutableArray = ［NSMutableArray alloc] init];
    
16.     NSArray *array = [NSArray arrayWithObjects:
    
17.                       @"a",@"b",@"c",nil];
    
18.     NSLog(@"array:%@",array);
    
19.     MutableArray = [NSMutableArray arrayWithArray:array];
    
20.     NSLog(@"MutableArray:%@",MutableArray);
    
21. 
    
22.     array1 = [NSArray arrayWithArray:array];
    
23.     NSLog(@"array1:%@",array1);
    
24.     //Copy
    
25.     //id obj;
    
26.     NSMutableArray *newArray = ［NSMutableArray alloc] init];
    
27.     NSArray *oldArray = [NSArray arrayWithObjects:
    
28.                          @"a",@"b",@"c",@"d",@"e",@"f",@"g",@"h",nil];
    
29. 
    
30.     NSLog(@"oldArray:%@",oldArray);
    
31.     for(int i = 0; i < [oldArray count]; i++)
    
32.     {        
    
33.         obj = ［oldArray objectAtIndex:i] copy];
    
34.         [newArray addObject: obj];
    
35.     }
    
36.     //     
    
37.     NSLog(@"newArray:%@", newArray);
    
38.     [newArray release];
    
39. 
    
40.     //快速枚举
    
41. 
    
42.     //NSMutableArray *newArray = ［NSMutableArray alloc] init];
    
43.     NSArray *oldArray = [NSArray arrayWithObjects:
    
44.                          @"a",@"b",@"c",@"d",@"e",@"f",@"g",@"h",nil];   
    
45.     NSLog(@"oldArray:%@",oldArray);
    
46. 
    
47.     for(id obj in oldArray)
    
48.     {
    
49.         [newArray addObject: obj];
    
50.     }
    
51.     //     
    
52.     NSLog(@"newArray:%@", newArray);
    
53.     [newArray release];   
    
54. 
    
55.     //Deep copy
    
56.     //NSMutableArray *newArray = ［NSMutableArray alloc] init];
    
57.     NSArray *oldArray = [NSArray arrayWithObjects:
    
58.                          @"a",@"b",@"c",@"d",@"e",@"f",@"g",@"h",nil];   
    
59.     NSLog(@"oldArray:%@",oldArray);   
    
60.     newArray = (NSMutableArray*)CFPropertyListCreateDeepCopy(kCFAllocatorDefault, (CFPropertyListRef)oldArray, kCFPropertyListMutableContainers);
    
61.     NSLog(@"newArray:%@", newArray);
    
62.     [newArray release];   
    
63. 
    
64.     //Copy and sort
    
65. 
    
66.     //NSMutableArray *newArray = ［NSMutableArray alloc] init];
    
67.     NSArray *oldArray = [NSArray arrayWithObjects:
    
68.                          @"b",@"a",@"e",@"d",@"c",@"f",@"h",@"g",nil];   
    
69.     NSLog(@"oldArray:%@",oldArray);
    
70.     NSEnumerator *enumerator;
    
71.     enumerator = [oldArray objectEnumerator];
    
72.     id obj;
    
73.     while(obj = [enumerator nextObject])
    
74.     {
    
75.         [newArray addObject: obj];
    
76.     }
    
77.     [newArray sortUsingSelector:@selector(compare:)];
    
78.     NSLog(@"newArray:%@", newArray);
    
79.     [newArray release];
    
80. 
    
81.     //从字符串分割到数组－ componentsSeparatedByString:
    
82.     NSString *string = ［NSString alloc] initWithString:@"One,Two,Three,Four"];
    
83.     NSLog(@"string:%@",string);   
    
84.     NSArray *array = [string componentsSeparatedByString:@","];
    
85.     NSLog(@"array:%@",array);
    
86.     [string release];
    
87. 
    
88.     //从数组合并元素到字符串- componentsJoinedByString:
    
89.     NSArray *array = ［NSArray alloc] initWithObjects:@"One",@"Two",@"Three",@"Four",nil];
    
90.     NSString *string = [array componentsJoinedByString:@","];
    
91.     NSLog(@"string:%@",string);
    
92.    
    
93.     //NSArray *array;
    
94.     array = [NSMutableArray arrayWithCapacity:20];   
    
95.     //- (void) addObject: (id) anObject;
    
96.     //NSMutableArray *array = [NSMutableArray arrayWithObjects:
    
97.     @"One",@"Two",@"Three",nil];
    
98.     [array addObject:@"Four"];
    
99.     NSLog(@"array:%@",array);
    
100. 
     
101.     //-(void) removeObjectAtIndex: (unsigned) index;   
     
102.     //NSMutableArray *array = [NSMutableArray arrayWithObjects:
     
103.     @"One",@"Two",@"Three",nil];
     
104.     [array removeObjectAtIndex:1];
     
105.     NSLog(@"array:%@",array);        
     
106.     //- (NSEnumerator *)objectEnumerator;从前向后
     
107.     //NSMutableArray *array = [NSMutableArray arrayWithObjects:
     
108.     @"One",@"Two",@"Three",nil];
     
109.     NSEnumerator *enumerator;
     
110.     enumerator = [array objectEnumerator];
     
111. 
     
112.     id thingie;
     
113.     while (thingie = [enumerator nextObject]) {
     
114.         NSLog(@"thingie:%@",thingie);
     
115.     }
     
116. 
     
117.     //- (NSEnumerator *)reverseObjectEnumerator;从后向前
     
118.     //NSMutableArray *array = [NSMutableArray arrayWithObjects:
     
119.     @"One",@"Two",@"Three",nil];
     
120.     NSEnumerator *enumerator;
     
121.     enumerator = [array reverseObjectEnumerator];
     
122. 
     
123.     id object;
     
124.     while (object = [enumerator nextObject]) {
     
125.         NSLog(@"object:%@",object);
     
126.     }
     
127. 
     
128.     //快速枚举
     
129.     //NSMutableArray *array = [NSMutableArray arrayWithObjects:
     
130.     @"One",@"Two",@"Three",nil];
     
131.     for(NSString *string in array)
     
132.     {
     
133.         NSLog(@"string:%@",string);
     
134.     }
     
135.     //- (id) initWithObjectsAndKeys;
     
136. 
     
137.     //NSDictionary *dictionary = ［NSDictionary alloc] initWithObjectsAndKeys:@"One",@"1",@"Two",@"2",@"Three",@"3",nil];
     
138.     NSString *string = [dictionary objectForKey:@"One"];
     
139.     NSLog(@"string:%@",string);
     
140.     NSLog(@"dictionary:%@",dictionary);
     
141.     [dictionary release];   
     
142.     //创建
     
143.     NSMutableDictionary *dictionary = [NSMutableDictionary dictionary];
     
144. 
     
145.     //添加字典
     
146.     [dictionary setObject:@"One" forKey:@"1"];
     
147.     [dictionary setObject:@"Two" forKey:@"2"];
     
148.     [dictionary setObject:@"Three" forKey:@"3"];
     
149.     [dictionary setObject:@"Four" forKey:@"4"];
     
150.     NSLog(@"dictionary:%@",dictionary);
     
151. 
     
152.     //删除指定的字典
     
153.     [dictionary removeObjectForKey:@"3"];
     
154.     NSLog(@"dictionary:%@",dictionary);
     
155. 
     
156.     //将NSRect放入NSArray中
     
157.     NSMutableArray *array = ［NSMutableArray alloc] init];
     
158.     NSValue *value;
     
159.     CGRect rect = CGRectMake(0, 0, 320, 480);   
     
160.     value = [NSValue valueWithBytes:&rect objCType:@encode(CGRect)];
     
161.     [array addObject:value];
     
162.     NSLog(@"array:%@",array);
     
163. 
     
164.     //从Array中提取
     
165.     value = [array objectAtIndex:0];
     
166.     [value getValue:&rect];
     
167.     NSLog(@"value:%@",value);
     
168. 
     
169.     //NSFileManager *fileManager = [NSFileManager defaultManager];
     
170.     NSString *home;
     
171.     home = @"../Users/";
     
172. 
     
173.     NSDirectoryEnumerator *direnum;
     
174.     direnum = [fileManager enumeratorAtPath: home];
     
175. 
     
176.     NSMutableArray *files = ［NSMutableArray alloc] init];
     
177. 
     
178.     //枚举
     
179.     NSString *filename;
     
180.     while (filename = [direnum nextObject]) {
     
181.         if(［filename pathExtension] hasSuffix:@"jpg"]){
     
182.             [files addObject:filename];
     
183.         }
     
184.     }
     
185. 
     
186.     //快速枚举
     
187.     //for(NSString *filename in direnum)
     
188.     //{
     
189.     //    if(［filename pathExtension] isEqualToString:@"jpg"]){
     
190.     //        [files addObject:filename];
     
191.     //    }
     
192.     //}
     
193.     NSLog(@"files:%@",files);
     
194. 
     
195.     //枚举
     
196.     NSEnumerator *filenum;
     
197.     filenum = [files objectEnumerator];
     
198.     while (filename = [filenum nextObject]) {
     
199.         NSLog(@"filename:%@",filename);
     
200.     }
     
201. 
     
202.     //快速枚举
     
203.     //for(id object in files)
     
204.     //{
     
205.     //    NSLog(@"object:%@",object);
     
206.     //}

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受教了，很好的笔记