iOS开发一行代码系列:一行搞定数据库

原理

iOS 和 SQL的对应关系

Model类结构      =>    SQL表结构

Model实例       =>  SQL表中的一行

Model实例的属性   =>   SQL表中的一列

Model和Table的对应

@interface TestModel :NSObject

@property (assign, nonatomic) NSInteger age;
@property (assign, nonatomic) CGFloat height;
@property (assign, nonatomic) long distance;
@property (assign, nonatomic) double maxDistance;
@property (assign, nonatomic) BOOL isOK;
@property (assign, nonatomic) char mChar;

@property (assign, nonatomic) CGRect rect;
@property (assign, nonatomic) CGPoint point;
@property (assign, nonatomic) CGSize size;
@property (assign, nonatomic) NSRange range;

@property (strong, nonatomic) NSNumber *number;
@property (strong, nonatomic) NSString *string;
@property (strong, nonatomic) UIColor *color;
@property (strong, nonatomic) NSDate *date;

@property (strong, nonatomic) NSData *data;// convert to data
@property (strong, nonatomic) NSValue *value;
@property (strong, nonatomic) UIImage *image;

@end

对应的表结构就是 TABLE TestModel (age type,height type,distance type,isOK type,mChar type,...)

方法

下面是一些可用的方法，还在完善中。。。

+(ModelToTableMap*)getModelToTableMap;

+(NSString*)getDBPath;
+(NSString*)getTableName;
+(NSArray*)getPrimaryKeys;

+(NSDictionary *)getPropertyToColumnMap;
+(NSDictionary *)getDefaultValueDictionary;
+(NSDictionary *)getLengthDictionary;
+(NSDictionary *)getCheckValueDictionary;
+(NSDictionary *)getIsUniqueDictionary;
+(NSDictionary *)getIsNotNullDictionary;

+(BOOL)shouldModelToTableMapContainParentProperties;
+(BOOL)shouldModelToTableMapContainSelfProperties;

+(NSString *)getDateFormatterString;
+(NSString *)getDBImagePathWithImageName:(NSString *)imgName ;
+(NSString *)getDBDataPathWithDataName:(NSString *)dataName;

+(BOOL)createTable;

+(BOOL)dropTable;

+(id)firstModelWhere:(NSObject *)where;
+(id)firstModelWhere:(NSObject *)where orderBy:(NSString*)orderBy ;

+(NSArray *)allModels;
+(NSArray *)findModelsWhere:(NSObject *)where;
+(NSArray *)findModelsWhere:(NSObject *)where orderBy:(NSString*)orderBy offset:(int)offset count:(int)count;

+(BOOL)insertModel:(NSObject *)model;
+(BOOL)insertModelWhenNotExists:(NSObject *)model;

+(BOOL)deleteModel:(NSObject *)model;
+(BOOL)deleteModelsWhere:(NSObject *)where;

+(BOOL)updateModelsWithModel:(NSObject *)model where:(NSObject *)where;
+(BOOL)updateModelsWithDictionary:(NSDictionary *)dic where:(NSObject *)where;

+(BOOL)isModelExists:(NSObject *)model;

- (BOOL)saveModel;
- (BOOL)deleteModel;
- (BOOL)updateModel:(NSObject *)theNewModel;
- (BOOL)updateModelWithDictionary:(NSDictionary *)dic;

使用

TestModel ＊model ＝ [[TestModel alloc] init］;
model.age = 20;
model.image = [UIImage imageNamed:@"img.jpg"];

//增加
[model saveModel]

//删除
[model deleteModel]

//修改
[model updateModelWithDictionary:@{@"age":@(21)}]

//查找
[TestModel allModels]

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