原貼地址：http://blog.csdn.net/cloudhsu/article/details/6589313

Object-C同樣沒有提供Queue容器,因此我也自己實踐了一個

#import <Foundation/Foundation.h>
@interface NSQueue : NSObject {
NSMutableArray* m_array;
}
- (void)enqueue:(id)anObject;
- (id)dequeue;
- (void)clear;
@property (nonatomic, readonly) int count;
@end

#import "NSQueue.h"
@implementation NSQueue
@synthesize count;
- (id)init
{
if( self=[super init] )
{
m_array = [[NSMutableArray alloc] init];
count = 0;
}
return self;
}
- (void)dealloc {
[m_array release];
[self dealloc];
    [super dealloc];
}
- (void)enqueue:(id)anObject
{
[m_array addObject:anObject];
count = m_array.count;
}
- (id)dequeue
{
    id obj = nil;
    if(m_array.count > 0)
    {
        obj = [[[m_array objectAtIndex:0]retain]autorelease];
        [m_array removeObjectAtIndex:0];
        count = m_array.count;
    }
    return obj;
}
- (void)clear
{
[m_array removeAllObjects];
        count = 0;
}
@end

在此謝謝cloudhsu大神，移動開發大牛