我正在获取以下格式的字典：
[
{
"position": "1",
"name": "Jaen",
"group": "Student",
"Address": "Delhi"
},
{
"position": "2",
"name": "Jaen",
"group": "Student",
"Address": "Delhi"
},
{
"position": "1",
"name": "Jaen",
"group": "Teacher",
"Address": "Delhi"
}
]
基本上，我想将它们分组在名为“ group”的键周围。我必须创建以下格式的字典以在UI中填充数据。
[
{
"Student": [
{
"position": "1",
"name": "Jaen",
"group": "Student",
"Address": "Delhi"
},
{
"position": "2",
"name": "Jaen",
"group": "Student",
"Address": "Delhi"
}
],
"Teacher": [
{
"position": "1",
"name": "Jaen",
"group": "Teacher",
"Address": "Delhi"
}
]
}
]
应保持小组的顺序，即学生应排在老师之前。但是，当我打印dictGroupField时，它会按顺序给出随机结果。
如何维护订单？
请在下面找到我正在使用的代码：
@property (strong, nonatomic) NSMutableDictionary *dictGroupField;
-(void)loadFieldData {
_dictGroupField = [[NSMutableDictionary alloc] init];
NSMutableArray *arrayFields = [self getArrayFields];
for (NSDictionary *dictT in arrayFields) {
NSString *strGroup = [dict valueForKey:@"group"];
if ([_dictGroupField valueForKey:strGroup] == nil) {
NSMutableArray *arrGroup = [[NSMutableArray alloc] init];
[arrGroup addObject:dict];
[_dictGroupField setObject:arrGroup forKey:strGroup];
} else {
NSMutableArray *arrGroupExist = [_dictGroupField valueForKey:strGroup];
[arrGroupExist addObject:dict];
[_dictGroupField setObject:arrGroupExist forKey:strGroup];
}
}
}