转自：http://gekie.iteye.com/blog/1086256
ＮＳＡＲＲＡＹ简单的使用
定义数组，遍历数组：
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NSArray *array;
array = [NSArray arrayWithObjects:@"one", @"two", @"three", @"four",nil];
int i;
for(i = 0; i < [array count]; i++)
{
NSLog(@"index %d has %@.",i,[array objectAtIndex:i]);
}
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切分字符串：
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NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init];
// insert code here...
NSString *string = @"oop:ack:bork:greeble:ponies";
NSArray *array = [[[NSArray array] init] autorelease];
// array = [NSArray arrayWithObjects:@"one", @"two", @"three", @"four",nil];
array = [string componentsSeparatedByString:@":"];
int i;
for(i = 0; i < [array count]; i++)
{
NSLog(@"index %d has %@.",i,[array objectAtIndex:i]);
}
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合并数组：
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NSArray *array1 = [NSArray arrayWithObjects:@"1", @"2", @"3", nil];
NSString *joinedString = [array1 componentsJoinedByString:@","];
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可变数组：
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NSMutableArray *array = [[[NSMutableArray alloc] init] autorelease];
array = [NSMutableArray arrayWithCapacity: 17];
int i;
for(i = 0; i < 4; i++)
{
[array addObject:@"aaa"];
NSLog(@"hello %d %@",i, [array objectAtIndex:i]);
}
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