FMDBHelper is available through CocoaPods. To install it, simply add the following line to your Podfile:
pod 'FMDBHelper', '1.1.0'
support for sqlite rw.
- Add
#import "FMDBHelper.h"to your prefix.pch - And
[FMDBHelper setDataBaseName:@"demo.db"];
if you have a table like this:
user (
id text PRIMARY KEY,
name text,
age integer,
birthday text,
dept text,
dogs text,
nums text
)or have a JSON like this:
{
"id": "a1b2c3d4e5",
"username": "李京城",
"age": 32,
"birthday": "1984/3/28",
"dept":{
"id": "f6g7h8i9j0",
"name": "dev",
"manager": "X"
},
"dogs":[{
"id": "0x0x0x0x",
"name": "ahuang",
"age": "15"
}, {
"id": "1x1x1x1x",
"name": "xhei",
"age": "6"
}
],
"nums":[
123,
234
]
}Create a model class and declare properties, property name must be consistent with the field names in a database table, but it doesn't have to be consistent with json keys.
//User.h
@interface User : NSObject
@property (nonatomic, copy) NSString *name;
@property (nonatomic, assign) NSInteger age;
@property (nonatomic, copy) NSString *birthday;
@property (nonatomic, strong) Dept *dept;
@property (nonatomic, copy) NSArray<Dog *> *dogs;
@property (nonatomic, copy) NSArray<NSNumber *> *nums;
@end
//User.m
@implementation User
// if the property name and the JSON keys is different, you need to overwrite this method.
- (NSDictionary *)mapping {
return @{ @"username": @"name" };
}
// if the property type is a custom class, you need to overwrite this method.
- (NSDictionary *)objectPropertys {
return @{ @"dept": [Dept class] };
}
// If the property type is a NSArray<...>, and the property type is a custom class, you need to overwrite this method.
- (NSDictionary *)genericForArray {
return @{ @"dogs": [Dog class] };
}
// if the model class name and the table name is different, you need to overwrite this method
+ (NSString *)tableName {
return @"sys_user";
}
@endRead JSON and insert it into the table.
NSString *path = [[NSBundle mainBundle] pathForResource:@"demo" ofType:@"json"];
NSDictionary *keyValues = [NSJSONSerialization JSONObjectWithData:[NSData dataWithContentsOfFile:path] options:NSJSONReadingMutableLeaves error:nil];
User *user = [[User alloc] initWithDictionary:keyValues];
[FMDBHelper insertObject:user];
Query data from the table and initialize the model object
NSDictionary *result = [FMDBHelper queryById:@"a1b2c3d4e5" from:[User tableName]];
User *user = [[User alloc] initWithDictionary:result];
NSLog(@"%@, %@, %ld, %@", user.ID, user.name, (long)user.age, user.birthday);
NSLog(@"%@, %@, %@", user.dept.ID, user.dept.name, user.dept.manager);
NSArray<Dog *> *dogs = user.dogs;
[dogs enumerateObjectsUsingBlock:^(Dog * _Nonnull obj, NSUInteger idx, BOOL * _Nonnull stop) {
NSLog(@"%@,%@,%ld", obj.ID, obj.name, obj.age);
}];More usage reference test case.
FMDBHelper is available under the MIT license. See the LICENSE file for more info.
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