关于NSEnumerator关于NSEnumerator

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我是靠谱客的博主机智大米，最近开发中收集的这篇文章主要介绍关于NSEnumerator关于NSEnumerator，觉得挺不错的，现在分享给大家，希望可以做个参考。

概述

关于NSEnumerator

从iOS 2.0开始，可以使用NSEnumerator来枚举NSArray、NSDictionary和NSSet对象中的元素。NSEnumerator本身是个抽象类。它依靠几个工厂方法，如objectEnumerator或keyEnumerator，来创建并返回相应的具体枚举器对象。客户端用返回的枚举器对象遍历集合中的元素，如下面的代码段所示。

2016-08-10 18:27:37.573 CollectionViewDemo[1161:151734] {

"headline_ad" = (

{

imgsrc = "http://cms-bucket.nosdn.127.net/34a3d631fede42678a437decbd2be06320160810170353.jpeg";

subtitle = "";

tag = photoset;

title = "U91ccU7ea6U4e00U5965U8fd0U5a92U4f53U5927U5df4U906dU88adU51fb U81f4U8bb0U8005U53d7U4f24";

url = "00AO0001|2190986";

{

imgsrc = "http://cms-bucket.nosdn.127.net/fce0a63fbd344839ae18ce3cad0c61b220160810154706.jpeg";

subtitle = "";

tag = photoset;

title = "U63a2U8bbfU5df4U897fU70edU5e26U96e8U6797U6df1U5904U7684U907fU5b55U5957U5de5U5382";

url = "57KT0001|2190981";

{

imgsrc = "http://cms-bucket.nosdn.127.net/c722897a9e6346f48966482eb85f411620160810144048.jpeg";

subtitle = "";

tag = photoset;

title = "U5185U8499U53e4U73b0U5f3aU964dU6c34 U653fU5e9cU5927U697cU906dU6d2aU6c34"U6d17U52ab"";

url = "00AP0001|2190979";

{

imgsrc = "http://cms-bucket.nosdn.127.net/88a4272be3ce43f7ab778c64fc7ed86620160810094032.jpeg";

subtitle = "";

tag = photoset;

title = "U6e38U5ba2U591cU6e38U5927U8fdeU6d77U8fb9 U7559U4e0bU5783U573eU904dU5730";

url = "00AP0001|2190941";

}

);

}

下面我们来取出数据.

 NSString *urlString = @"http://c.m.163.com/nc/ad/headline/0-4.html";
 
 [[HYFNetworkTools sharedTools]requsetWithType:GET urlString:urlString params:nil success:^(NSDictionary * response) {
 
 //取出字典中的第一个元素.
 NSString *rootKey = response.keyEnumerator.nextObject;
 NSArray *array = response[rootKey];
 
 NSMutableArray *mArray = [NSMutableArray array];
 
 [array enumerateObjectsUsingBlock:^(id  _Nonnull obj, NSUInteger idx, BOOL * _Nonnull stop) {
 
 HYFHeadLineModel *model = [HYFHeadLineModel modelWithDict:obj];
 
 [mArray addObject:model];
 }];
 
 successBlock(mArray.copy);
 
 } failure:^(NSError *error) {
 
 failureBlock(error);
 
 }];