可變的NSArray,可以随意添加OC對象
1.建立
1 void arrayCreate()
2 {
3 NSMutableArray *array = [NSMutableArray arrayWithObject:@"1"];
4
5 [array addObject:@"2"];
6 [array addObject:@"3"];
7
8 [array removeObject:@"2"];
9 NSLog(@"%@", array);
10 }
NSMutableArray 不能使用@[]建立 2.記憶體管理 當Array release的時候,裡面的元素也會release一次
1 void memoryManage()
2 {
3 NSMutableArray *array = [NSMutableArray array];
4 Student *stu1 = [Student initWithAge:12];
5 Student *stu2 = [Student initWithAge:42];
6
7 //Will retain stu1 one time automatically
8 [array addObject:stu1];
9 [array addObject:stu2];
10
11 NSLog(@"add--> stu1: %zi", [stu1 retainCount]);
12
13 //Will release stu1 one time automatically
14 [array removeObject:stu1];
15 NSLog(@"remoe--> stu1: %zi", [stu1 retainCount]);
16
17 NSLog(@"%@", array);
18
19 //All element will be released one time
20 [array release];
21 }
3.替換元素
1 void replaceArray()
2 {
3 NSMutableArray *array = [NSMutableArray arrayWithObjects:@"1", @"2", @"3", nil];
4 [array replaceObjectAtIndex:2 withObject:@"a"];
5 NSLog(@"%@", array);
6 }
4.排序
1 void arraySort()
2 {
3 NSMutableArray *array = [NSMutableArray arrayWithObjects:@"1", @"3", @"3", nil];
4 [array sortedArrayUsingSelector:@selector(compare:)];
5 NSLog(@"%@", array);
6 }
5.删除元素
1 NSMutableArray *a = [NSMutableArray array];
2 [a addObject:@1];
3 [a addObject:@2];
4 [a removeObject:@1];
5 NSLog(@"%@", a);
6 [a removeAllObjects];
7 NSLog(@"%@", a);
轉載于:https://www.cnblogs.com/hellovoidworld/p/4119408.html