本文介绍了在数组中访问NSDictionary的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我在从数组(从JSON字符串)访问所需数据时遇到一些问题
Im having a few problems accessing the required data from an array (which is from a JSON string)
JSON数组中的数据存储在PatternImagesArray中
The data from the JSON array is stored in the PatternImagesArray
我正在收藏视图中显示图像，并希望计算一个部分中的项目数.
Im displaying images within a collection view and want to count the number of items within a section.
-(NSInteger)collectionView:(UICollectionView *)collectionView numberOfItemsInSection:(NSInteger)section {
//return [self.patternImagesArray count];
NSDictionary *itemsInSection = [self.patternImagesArray objectAtIndex:section];
NSInteger *ItemCount = [itemsInSection count];
return ItemCount;
}
这是JSON字符串
[{"RequestTitle":[{"ID":"16","path":"upload\/images\/14439822460482106558105.jpg","thumb_path":""},{"ID":"50","path":"upload\/images\/1445170810100.jpg","thumb_path":"upload\/images\/thumb_1445170810100.jpg"},{"ID":"51","path":"upload\/images\/1445172097564.jpg","thumb_path":"upload\/images\/thumb_1445172097564.jpg"},{"ID":"60","path":"upload\/images\/1445184745267.jpg","thumb_path":"upload\/images\/thumb_1445184745267.jpg"},{"ID":"61","path":"upload\/images\/1445184815796.jpg","thumb_path":"upload\/images\/thumb_1445184815796.jpg"},{"ID":"62","path":"upload\/images\/1445184872026.jpg","thumb_path":"upload\/images\/thumb_1445184872026.jpg"},{"ID":"64","path":"upload\/images\/1445192930295.jpg","thumb_path":"upload\/images\/thumb_1445192930295.jpg"},{"ID":"65","path":"upload\/images\/1445260759823.jpg","thumb_path":"upload\/images\/thumb_1445260759823.jpg"},{"ID":"66","path":"upload\/images\/1446759963249.jpg","thumb_path":"upload\/images\/thumb_1446759963249.jpg"},{"ID":"67","path":"upload\/images\/1446760122026.jpg","thumb_path":"upload\/images\/thumb_1446760122026.jpg"},{"ID":"69","path":"upload\/images\/","thumb_path":"upload\/images\/thumb_"},{"ID":"70","path":"upload\/images\/1446760923270.jpg","thumb_path":"upload\/images\/thumb_1446760923270.jpg"},{"ID":"78","path":"upload\/images\/1447504226902.jpg","thumb_path":"upload\/images\/thumb_1447504226902.jpg"},{"ID":"82","path":"upload\/images\/1447934170005.jpg","thumb_path":"upload\/images\/thumb_1447934170005.jpg"}]},{"RequestTitle":[{"ID":"19","path":"upload\/images\/1430571954572.jpg","thumb_path":""},{"ID":"52","path":"upload\/images\/1445173074393.jpg","thumb_path":"upload\/images\/thumb_1445173074393.jpg"},{"ID":"53","path":"upload\/images\/1445173124081.jpg","thumb_path":"upload\/images\/thumb_1445173124081.jpg"},{"ID":"77","path":"upload\/images\/1446818706307.jpg","thumb_path":"upload\/images\/thumb_1446818706307.jpg"},{"ID":"80","path":"upload\/images\/1447504506629.jpg","thumb_path":"upload\/images\/thumb_1447504506629.jpg"}]},{"RequestTitle":[{"ID":"21","path":"upload\/images\/security.jpeg","thumb_path":""},{"ID":"54","path":"upload\/images\/","thumb_path":"upload\/images\/thumb_"},{"ID":"55","path":"upload\/images\/1445173189403.jpg","thumb_path":"upload\/images\/thumb_1445173189403.jpg"},{"ID":"63","path":"upload\/images\/1445184942890.jpg","thumb_path":"upload\/images\/thumb_1445184942890.jpg"},{"ID":"68","path":"upload\/images\/1446760628765.jpg","thumb_path":"upload\/images\/thumb_1446760628765.jpg"}]},{"RequestTitle":[{"ID":"20","path":"upload\/images\/1443975202043-1048396424.jpg","thumb_path":""},{"ID":"56","path":"upload\/images\/","thumb_path":"upload\/images\/thumb_"},{"ID":"57","path":"upload\/images\/1445173301456.jpg","thumb_path":"upload\/images\/thumb_1445173301456.jpg"},{"ID":"58","path":"upload\/images\/","thumb_path":"upload\/images\/thumb_"},{"ID":"59","path":"upload\/images\/1445177540605.jpg","thumb_path":"upload\/images\/thumb_1445177540605.jpg"},{"ID":"79","path":"upload\/images\/1447504348072.jpg","thumb_path":"upload\/images\/thumb_1447504348072.jpg"}]}]
变量patternImageArray的结构类似
the variable patternImageArray i structured like so
_patternImagesArray __NSCFArray * @"4 objects" 0x00000001546e48e0
[0] __NSCFDictionary * 1 key/value pair 0x00000001546e3510
[0] struct __lldb_autogen_nspair
key __NSCFString * @"RequestTitle" 0x0000000154612fa0
value __NSCFArray * @"14 objects" 0x00000001546e3470
[0] __NSCFDictionary * 3 key/value pairs 0x000000015466c2a0
[1] __NSCFDictionary * 3 key/value pairs 0x00000001546e1f70
[2] __NSCFDictionary * 3 key/value pairs 0x00000001546e28b0
[3] __NSCFDictionary * 3 key/value pairs 0x00000001546c1230
[4] __NSCFDictionary * 3 key/value pairs 0x00000001546e2960
[5] __NSCFDictionary * 3 key/value pairs 0x00000001546e2a30
[6] __NSCFDictionary * 3 key/value pairs 0x00000001546e3040
[7] __NSCFDictionary * 3 key/value pairs 0x00000001546e16f0
[8] __NSCFDictionary * 3 key/value pairs 0x00000001546e1830
[9] __NSCFDictionary * 3 key/value pairs 0x00000001546e1970
[10] __NSCFDictionary * 3 key/value pairs 0x00000001546e1a70
[11] __NSCFDictionary * 3 key/value pairs 0x00000001546e3190
[12] __NSCFDictionary * 3 key/value pairs 0x00000001546e32b0
[13] __NSCFDictionary * 3 key/value pairs 0x00000001546e33f0
[1] __NSCFDictionary * 1 key/value pair 0x00000001546e3bf0
[2] __NSCFDictionary * 1 key/value pair 0x00000001546e41e0
[3] __NSCFDictionary * 1 key/value pair 0x00000001546e4860
我需要访问状态为14项的节点
I need to access the node which states that are 14 items
预先感谢
推荐答案
有人张贴了已删除的评论，不知道为什么，因为它是正确的答案
Someone posted a comment that was removed, not sure why as it was the right answer
用于计数数组/nsditontonary的校正后的代码是
the corrected code for counting the array/nsdicitonary is
-(NSInteger)collectionView:(UICollectionView *)collectionView numberOfItemsInSection:(NSInteger)section {
//return [self.patternImagesArray count];
NSDictionary *itemsInSection = [self.patternImagesArray objectAtIndex:section];
NSInteger *ItemCount = [[itemsInSection allValues][0] count];
return ItemCount;
}
希望这对其他人有帮助
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