当我解析一个JSON时,我在NSArray中得到以下结果
(
{
category = Allergies;
group = Allergies;
name = "Food Allergies";
option = "";
subGroup = "";
type = VARCHAR;
},
{
category = Allergies;
group = Allergies;
name = "Drug Allergies";
option = "";
subGroup = "";
type = VARCHAR;
},
{
category = Allergies;
group = "";
name = "Blood Group";
option = "[{\"id\":1,\"isDefault\":false,\"additionalOption\":false,\"optionName\":\"A+\"},{\"id\":2,\"isDefault\":false,\"additionalOption\":false,\"optionName\":\"A-\"},{\"id\":3,\"isDefault\":false,\"additionalOption\":false,\"optionName\":\"B+\"},{\"id\":4,\"isDefault\":false,\"additionalOption\":false,\"optionName\":\"B-\"},{\"id\":5,\"isDefault\":false,\"additionalOption\":false,\"optionName\":\"O+\"},{\"id\":6,\"isDefault\":false,\"additionalOption\":false,\"optionName\":\"O-\"},{\"id\":7,\"isDefault\":false,\"additionalOption\":false,\"optionName\":\"AB+\"},{\"id\":8,\"isDefault\":false,\"additionalOption\":false,\"optionName\":\"AB-\"}]";
subGroup = "";
type = SINGLESELECT;
}
)
现在,当我尝试为键“选项”取值时
[array valueForKey:@"option"]objectAtIndex:indexPath.row];
我得到了以下结果
[{"id":1,"isDefault":false,"additionalOption":false,"optionName":"A+"},{"id":2,"isDefault":false,"additionalOption":false,"optionName":"A-"},{"id":3,"isDefault":false,"additionalOption":false,"optionName":"B+"},{"id":4,"isDefault":false,"additionalOption":false,"optionName":"B-"},{"id":5,"isDefault":false,"additionalOption":false,"optionName":"O+"},{"id":6,"isDefault":false,"additionalOption":false,"optionName":"O-"},{"id":7,"isDefault":false,"additionalOption":false,"optionName":"AB+"},{"id":8,"isDefault":false,"additionalOption":false,"optionName":"AB-"}]
但是当尝试访问“ optionName”如下格式时
[optionArray valueForKey:@“ optionName”]; 然后我得到这个错误
*** Terminating app due to uncaught exception 'NSUnknownKeyException', reason: '[<__NSCFConstantString 0x10d8638a0> valueForUndefinedKey:]: this class is not key value coding-compliant for the key optionName.'
请帮我解决这个问题。
假设您使用的是ios 5或更高版本,则内置JSON序列化:
NSArray *json = [NSJSONSerialization
JSONObjectWithData:[string dataUsingEncoding:NSUTF8StringEncoding]
options:kNilOptions
error:&error];
在ios5之前,您可以使用SBJSON实现相同的目的:
NSArray *jsonObjects = [jsonParser objectWithString:string error:&error];
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我来说两句