iOS开发一行代码系列:一行搞定数据库
2024-08-31 03:01:49
原理
iOS 和 SQL的相应关系
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的相应
@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
相应的表结构就是 TABLE TestModel (age type,height type,distance type,isOK type,mChar type,...)
方法
以下是一些可用的方法,还在完好中。。。
+(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"];
//添加
[model saveModel]
//删除
[model deleteModel]
//改动
[model updateModelWithDictionary:@{@"age":@(21)}]
//查找
[TestModel allModels]
下载地址:点这里
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