Iphone數組一些基礎操作NSArray/NSMutableArray

  1 /*******************************************************************************************
  2      NSArray
  3      *******************************************************************************************/
  4
  5     /*---------------------------建立數組------------------------------*/
  6     //NSArray *array = ［NSArray alloc] initWithObjects:
  7     @"One",@"Two",@"Three",@"Four",nil];
  8
  9     self.dataArray = array;
 10     [array release];
 11
 12     //- (unsigned) Count;數組所包含對象個數；
 13     NSLog(@"self.dataArray cound:%d",[self.dataArray count]);
 14
 15     //- (id) objectAtIndex: (unsigned int) index;擷取指定索引處的對象;
 16     NSLog(@"self.dataArray cound 2:%@",[self.dataArray objectAtIndex:2]);
 17
 18
 19     /*--------------------------從一個數組拷貝資料到另一數組(可變數級)----------------------------*/   
 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     //快速枚舉
 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     /*---------------------------切分數組------------------------------*/
 99
100     //從字串分割到數組－ 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     //從數組合并元素到字串- componentsJoinedByString:
109     NSArray *array = ［NSArray alloc] initWithObjects:@"One",@"Two",@"Three",@"Four",nil];
110     NSString *string = [array componentsJoinedByString:@","];
111     NSLog(@"string:%@",string);
112
113
114
115     /*******************************************************************************************
116      NSMutableArray
117      *******************************************************************************************/
118     /*---------------給數組分配容量----------------*/
119     //NSArray *array;
120     array = [NSMutableArray arrayWithCapacity:20];
121
122
123
124     /*--------------在數組末尾添加對象----------------*/
125     //- (void) addObject: (id) anObject;
126 //NSMutableArray *array = [NSMutableArray arrayWithObjects:
127     @"One",@"Two",@"Three",nil];
128     [array addObject:@"Four"];
129     NSLog(@"array:%@",array);
130
131
132
133     /*--------------刪除數組中指定索引處對象----------------*/   
134     //-(void) removeObjectAtIndex: (unsigned) index;   
135 //NSMutableArray *array = [NSMutableArray arrayWithObjects:
136     @"One",@"Two",@"Three",nil];
137     [array removeObjectAtIndex:1];
138     NSLog(@"array:%@",array);
139
140
141
142     /*-------------數組枚舉---------------*/   
143     //- (NSEnumerator *)objectEnumerator;從前向後
144 //NSMutableArray *array = [NSMutableArray arrayWithObjects:
145     @"One",@"Two",@"Three",nil];
146     NSEnumerator *enumerator;
147     enumerator = [array objectEnumerator];
148
149     id thingie;
150     while (thingie = [enumerator nextObject]) {
151         NSLog(@"thingie:%@",thingie);
152     }
153
154
155     //- (NSEnumerator *)reverseObjectEnumerator;從後向前
156 //NSMutableArray *array = [NSMutableArray arrayWithObjects:
157     @"One",@"Two",@"Three",nil];
158     NSEnumerator *enumerator;
159     enumerator = [array reverseObjectEnumerator];
160
161     id object;
162     while (object = [enumerator nextObject]) {
163         NSLog(@"object:%@",object);
164     }
165
166
167     //快速枚舉
168 //NSMutableArray *array = [NSMutableArray arrayWithObjects:
169     @"One",@"Two",@"Three",nil];
170     for(NSString *string in array)
171     {
172         NSLog(@"string:%@",string);
173     }
174
175
176
177     /*******************************************************************************************
178      NSDictionary
179      *******************************************************************************************/
180
181     /*------------------------------------建立字典------------------------------------*/
182     //- (id) initWithObjectsAndKeys;
183
184 //NSDictionary *dictionary = ［NSDictionary alloc] initWithObjectsAndKeys:@"One",@"1",@"Two",@"2",@"Three",@"3",nil];
185     NSString *string = [dictionary objectForKey:@"One"];
186     NSLog(@"string:%@",string);
187     NSLog(@"dictionary:%@",dictionary);
188     [dictionary release];
189
190
191     /*******************************************************************************************
192      NSMutableDictionary
193      *******************************************************************************************/
194
195     /*------------------------------------建立可變字典------------------------------------*/   
196     //建立
197     NSMutableDictionary *dictionary = [NSMutableDictionary dictionary];
198
199     //添加字典
200     [dictionary setObject:@"One" forKey:@"1"];
201     [dictionary setObject:@"Two" forKey:@"2"];
202     [dictionary setObject:@"Three" forKey:@"3"];
203     [dictionary setObject:@"Four" forKey:@"4"];
204     NSLog(@"dictionary:%@",dictionary);
205
206     //刪除指定的字典
207     [dictionary removeObjectForKey:@"3"];
208     NSLog(@"dictionary:%@",dictionary);
209
210
211     /*******************************************************************************************
212      NSValue（對任何對象進行封裝）
213      *******************************************************************************************/
214
215     /*--------------------------------將NSRect放入NSArray中------------------------------------*/   
216     //將NSRect放入NSArray中
217     NSMutableArray *array = ［NSMutableArray alloc] init];
218     NSValue *value;
219     CGRect rect = CGRectMake(0, 0, 320, 480);   
220     value = [NSValue valueWithBytes:&rect objCType:@encode(CGRect)];
221     [array addObject:value];
222     NSLog(@"array:%@",array);
223
224     //從Array中提取
225     value = [array objectAtIndex:0];
226     [value getValue:&rect];
227     NSLog(@"value:%@",value);
228
229
230     /*******************************************************************************************
231      從目錄搜尋副檔名為jpg的檔案
232      *******************************************************************************************/
233
234     //NSFileManager *fileManager = [NSFileManager defaultManager];
235     NSString *home;
236     home = @"../Users/";
237
238     NSDirectoryEnumerator *direnum;
239     direnum = [fileManager enumeratorAtPath: home];
240
241     NSMutableArray *files = ［NSMutableArray alloc] init];
242
243     //枚舉
244     NSString *filename;
245     while (filename = [direnum nextObject]) {
246         if(［filename pathExtension] hasSuffix:@"jpg"]){
247             [files addObject:filename];
248         }
249     }
250
251     //快速枚舉
252 //for(NSString *filename in direnum)
253 //{
254 //    if(［filename pathExtension] isEqualToString:@"jpg"]){
255 //        [files addObject:filename];
256 //    }
257 //}
258     NSLog(@"files:%@",files);
259
260     //枚舉
261     NSEnumerator *filenum;
262     filenum = [files objectEnumerator];
263     while (filename = [filenum nextObject]) {
264         NSLog(@"filename:%@",filename);
265     }
266
267     //快速枚舉
268 //for(id object in files)
269 //{
270 //    NSLog(@"object:%@",object);
271 //}

 

摘自  技術成就理想