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)
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#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
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#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
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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服务器之家。
原文链接：https://blog.csdn.net/qq_41586150/article/details/104385727
