本文实例为大家分享了ios实现简易队列的具体代码，供大家参考，具体内容如下
满足一些特殊需求
接口部分(队列支持需求)
#import <Foundation/Foundation.h>
@interface XMQueue : NSObject
///队列追加
- (void)add:(id) obj;
///队列取出
- (id)next;
///返回队列最前端,不删除队列内元素
- (id)first;
///队列内是否还有元素
- (BOOL) isEmpty;
///队列转array
- (NSArray *) arrayCopy;
@end实现方法
#import "XMQueue.h"
@interface XMQueue()
@property NSMutableArray *array;
@property NSInteger currentIndex;
@end
@implementation XMQueue
- (instancetype)init
{
self = [super init];
if (self) {
self.array = [[NSMutableArray alloc] initWithCapacity:32];
}
return self;
}
- (void)add:(id) obj{
if (self.currentIndex >= self.array.count-1) {
NSMutableArray *newArray = [[NSMutableArray alloc] initWithCapacity:self.array.count*2];
for (id obj in self.array) {
[newArray addObject:obj];
}
self.array = newArray;
}
[self.array addObject:obj];
}
- (id)next{
if (![self isEmpty]) {
id obj = [self.array objectAtIndex:0];
[self.array removeObjectAtIndex:0];
return obj;
}else{
return @"Empty";
}
}
- (id)first{
if (![self isEmpty]) {
return self.array[0];
}else{
return @"Empty";
}
}
- (BOOL) isEmpty{
return self.array.count == 0;
}
@end测试
XMQueue *queue = [[XMQueue alloc] init];
for (int i = 0; i < 5; i++) {
[queue add:[NSNumber numberWithInt:i]];
}
for (NSNumber *number in [queue arrayCopy]) {
printf("%d,",[number intValue]);
}
printf("\n");
[queue add:[queue next]];
for (NSNumber *number in [queue arrayCopy]) {
printf("%d,",[number intValue]);
}
printf("\n");
[queue add:[queue next]];
for (NSNumber *number in [queue arrayCopy]) {
printf("%d,",[number intValue]);
}
printf("\n");
[queue add:[queue next]];
for (NSNumber *number in [queue arrayCopy]) {
printf("%d,",[number intValue]);
}
printf("\n");
[queue add:[queue next]];
for (NSNumber *number in [queue arrayCopy]) {
printf("%d,",[number intValue]);
}
printf("\n");
[queue add:[queue next]];
for (NSNumber *number in [queue arrayCopy]) {
printf("%d,",[number intValue]);
}结果
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持编程网。
