我有以下Json回复。
{
"language": "en",
"textAngle": 0,
"orientation": "Up",
"regions": [
{
"boundingBox": "96,29,244,474",
"lines": [
{
"boundingBox": "96,29,58,12",
"words": [
{
"boundingBox": "96,29,58,12",
"text": "SG4207"
}
]
},
{
"boundingBox": "97,64,159,16",
"words": [
{
"boundingBox": "97,65,27,15",
"text": "Eng"
},
{
"boundingBox": "129,64,34,16",
"text": "Lieh,"
},
{
"boundingBox": "168,65,37,12",
"text": "Yuen"
},
{
"boundingBox": "212,65,44,15",
"text": "Kwan,"
}
]
},
{
"boundingBox": "97,99,243,16",
"words": [
{
"boundingBox": "97,99,52,13",
"text": "Mobile"
},
{
"boundingBox": "154,99,64,13",
"text": "Wireless"
},
{
"boundingBox": "223,99,62,13",
"text": "Solution"
},
{
"boundingBox": "291,99,49,16",
"text": "Design"
}
]
},
{
"boundingBox": "97,134,117,16",
"words": [
{
"boundingBox": "97,134,44,16",
"text": "Darryl"
},
{
"boundingBox": "147,134,27,13",
"text": "and"
},
{
"boundingBox": "179,134,35,16",
"text": "Ajith"
}
]
},
{
"boundingBox": "96,169,71,16",
"words": [
{
"boundingBox": "96,169,71,16",
"text": "Weekday"
}
]
},
{
"boundingBox": "97,205,72,16",
"words": [
{
"boundingBox": "97,205,72,16",
"text": "(Monday)"
}
]
},
{
"boundingBox": "96,241,80,15",
"words": [
{
"boundingBox": "96,244,32,12",
"text": "gam"
},
{
"boundingBox": "133,248,5,1",
"text": "-"
},
{
"boundingBox": "143,241,33,15",
"text": "5pm"
}
]
},
{
"boundingBox": "96,275,72,13",
"words": [
{
"boundingBox": "96,275,72,13",
"text": "Weekend"
}
]
},
{
"boundingBox": "97,310,77,16",
"words": [
{
"boundingBox": "97,310,77,16",
"text": "(Saturday)"
}
]
},
{
"boundingBox": "96,347,80,15",
"words": [
{
"boundingBox": "96,350,32,12",
"text": "gam"
},
{
"boundingBox": "133,354,5,1",
"text": "-"
},
{
"boundingBox": "143,347,33,15",
"text": "5pm"
}
]
},
{
"boundingBox": "97,382,41,15",
"words": [
{
"boundingBox": "97,382,41,15",
"text": "3-Apr"
}
]
},
{
"boundingBox": "97,417,45,15",
"words": [
{
"boundingBox": "97,417,8,12",
"text": "1"
},
{
"boundingBox": "115,417,27,15",
"text": "Apr"
}
]
},
{
"boundingBox": "97,452,48,15",
"words": [
{
"boundingBox": "97,452,48,15",
"text": "ID-Apr"
}
]
},
{
"boundingBox": "96,488,42,15",
"words": [
{
"boundingBox": "96,488,42,15",
"text": "8-Apr"
}
]
}
]
}
]
}
需要在Swift3中从上面的json创建一个String数组。试过以下
if dictionary["regions"] != nil {
// Get Regions from the dictionary
let regions = (dictionary["regions"] as! NSArray).firstObject as? [String:AnyObject]
// Get lines from the regions dictionary
let lines = regions!["lines"] as! NSArray
// Get words from lines
let inLine = lines.enumerated().map {($0.element as? NSDictionary)?["words"] as! [[String : AnyObject]] }
// Get text from words
let extractedText = inLine.enumerated().map { $0.element[0]["text"] as! String}
return extractedText
} else {
return [""];
}
但没有得到实际的字符串。
答案 0 :(得分：1)
您只需要转换为正确的类型，您的代码几乎是正确的。我在游乐场创建了这段代码，我可以获得所有的值。
let jsonString = "{\"language\":\"en\",\"textAngle\":0,\"orientation\":\"Up\",\"regions\":[{\"boundingBox\":\"96,29,244,474\",\"lines\":[{\"boundingBox\":\"96,29,58,12\",\"words\":[{\"boundingBox\":\"96,29,58,12\",\"text\":\"SG4207\"}]},{\"boundingBox\":\"97,64,159,16\",\"words\":[{\"boundingBox\":\"97,65,27,15\",\"text\":\"Eng\"},{\"boundingBox\":\"129,64,34,16\",\"text\":\"Lieh,\"},{\"boundingBox\":\"168,65,37,12\",\"text\":\"Yuen\"},{\"boundingBox\":\"212,65,44,15\",\"text\":\"Kwan,\"}]},{\"boundingBox\":\"97,99,243,16\",\"words\":[{\"boundingBox\":\"97,99,52,13\",\"text\":\"Mobile\"},{\"boundingBox\":\"154,99,64,13\",\"text\":\"Wireless\"},{\"boundingBox\":\"223,99,62,13\",\"text\":\"Solution\"},{\"boundingBox\":\"291,99,49,16\",\"text\":\"Design\"}]},{\"boundingBox\":\"97,134,117,16\",\"words\":[{\"boundingBox\":\"97,134,44,16\",\"text\":\"Darryl\"},{\"boundingBox\":\"147,134,27,13\",\"text\":\"and\"},{\"boundingBox\":\"179,134,35,16\",\"text\":\"Ajith\"}]},{\"boundingBox\":\"96,169,71,16\",\"words\":[{\"boundingBox\":\"96,169,71,16\",\"text\":\"Weekday\"}]},{\"boundingBox\":\"97,205,72,16\",\"words\":[{\"boundingBox\":\"97,205,72,16\",\"text\":\"(Monday)\"}]},{\"boundingBox\":\"96,241,80,15\",\"words\":[{\"boundingBox\":\"96,244,32,12\",\"text\":\"gam\"},{\"boundingBox\":\"133,248,5,1\",\"text\":\"-\"},{\"boundingBox\":\"143,241,33,15\",\"text\":\"5pm\"}]},{\"boundingBox\":\"96,275,72,13\",\"words\":[{\"boundingBox\":\"96,275,72,13\",\"text\":\"Weekend\"}]},{\"boundingBox\":\"97,310,77,16\",\"words\":[{\"boundingBox\":\"97,310,77,16\",\"text\":\"(Saturday)\"}]},{\"boundingBox\":\"96,347,80,15\",\"words\":[{\"boundingBox\":\"96,350,32,12\",\"text\":\"gam\"},{\"boundingBox\":\"133,354,5,1\",\"text\":\"-\"},{\"boundingBox\":\"143,347,33,15\",\"text\":\"5pm\"}]},{\"boundingBox\":\"97,382,41,15\",\"words\":[{\"boundingBox\":\"97,382,41,15\",\"text\":\"3-Apr\"}]},{\"boundingBox\":\"97,417,45,15\",\"words\":[{\"boundingBox\":\"97,417,8,12\",\"text\":\"1\"},{\"boundingBox\":\"115,417,27,15\",\"text\":\"Apr\"}]},{\"boundingBox\":\"97,452,48,15\",\"words\":[{\"boundingBox\":\"97,452,48,15\",\"text\":\"ID-Apr\"}]},{\"boundingBox\":\"96,488,42,15\",\"words\":[{\"boundingBox\":\"96,488,42,15\",\"text\":\"8-Apr\"}]}]}]}"
if let jsonDict = (try? JSONSerialization.jsonObject(with: Data(jsonString.utf8))) as? [String: Any] {
if let regions = jsonDict["regions"] as? [[String: Any]] {
for region in regions {
if let lines = region["lines"] as? [[String: Any]] {
for line in lines {
if let words = line["words"] as? [[String: Any]] {
for word in words {
if let text = word["text"] {
print(text)
}
}
}
}
}
}
}
}
输出：
Weekday
(Monday)
gam
-
5pm
Weekend
(Saturday)
gam
-
5pm
3-Apr
1
Apr
ID-Apr
8-Apr
显然，这里有很多嵌套，你可以使用地图等功能整理它并缩短它，但这个练习更多的是向你展示每个级别所需的转换。