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更新时间：2022-08-27 15:30:57
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#import <Foundation/Foundation.h>typedef enum _db_op_result{
SUCCESSED = 0,
FAILED = 1,
CREATE_TABLE_FAILED = 5,
TRANSACTION_EXE_FAILED = 7,
UPDATE_FAILED = 9,
DELETE_FAILED = 10,
NOT_ALL_DONE = 20
} SMPDB_OPERATION_RESULT;typedef enum _db_op_type{
UPDATE = 1,
DELETE = 2,
INSERT = 3,
} SMPDB_OPERTION_TYPE;@protocol DbOperationDelegate <NSObject>
@optional- (NSInteger)udpate;
- (NSInteger)insert;
- (NSInteger)delete;
- (NSArray *)select:(NSString *)condition;
- (NSString *)tableName;
- (NSString *)fieldsString;
- (NSString *)queryString;
@end// SQLite Operation#import <Foundation/Foundation.h>#import "sqlite3.h"#import "DbOperationDelegate.h"@interface SMPDbUtil : NSObject{
NSString *databasePath;
sqlite3 *db;
}@property(readonly)sqlite3 *db;
- (NSInteger)createDatabase:(NSString *)dbName;
- (NSInteger)insert:(id<DbOperationDelegate>)obj;
- (NSInteger)insertSet:(NSString *)tableName tableFields:(NSArray *)fields valueSets:(NSArray *)values;
- (sqlite3_stmt *)select:(id<DbOperationDelegate>)obj conditions:(NSString *)cons;
- (NSInteger)update:(id<DbOperationDelegate>)obj;
@end//how to use#import <UIKit/UIKit.h>#import "DbOperationDelegate.h"@class ProvinceInfo;
@interface CityInfo : NSObject<DbOperationDelegate>{
NSInteger cityId;
NSString *cityName;
ProvinceInfo *province;
}@property(assign)NSInteger cityId;
@property(copy)NSString *cityName;
@property(retain)ProvinceInfo *province;
- (NSInteger)udpate;
- (NSInteger)insert;
- (NSInteger)delete;
- (NSArray *)select;
- (NSString *)fieldsString;
- (NSString *)queryString;
@end//.m#import "CityInfo.h"#import "ProvinceInfo.h"#import "SMPDbUtil.h"#define TABLE_NAME @"city"@implementation CityInfo
@synthesize cityId, cityName, province;
- (NSString *)tableName{
return @"city";
}- (NSString *)fieldsString{
return @" id, name, provinceId ";
}- (NSString *)queryString{
return [NSString stringWithFormat:@"%d, \"%@\", %d", self.cityId, self.cityName, ((self.province == nil? -1 : self.province.provinceId))];
}- (NSInteger)udpate{
SMPDbUtil *dbUtil = [[SMPDbUtil alloc]init];
NSInteger r = [dbUtil update:self];
[dbUtil release];
return r;
}- (NSInteger)insert{
SMPDbUtil *dbUtil = [[SMPDbUtil alloc]init];
NSInteger r = [dbUtil insert:self];
[dbUtil release];
return r;
}//- (NSInteger)delete{// return 0;//}- (NSArray *)select:(NSString *)condition{
SMPDbUtil *dbUtil = [[SMPDbUtil alloc]init];
sqlite3_stmt *statement = [dbUtil select:self conditions:condition];
if (statement == NULL) {
sqlite3_close(dbUtil.db);
return nil;
}
NSMutableArray *array = [[[NSMutableArray alloc]init]autorelease];
while (sqlite3_step(statement) == SQLITE_ROW) {
CityInfo *el = [[CityInfo alloc]init];
NSInteger id = sqlite3_column_int(statement, 0);
NSString *name = [[NSString alloc] initWithUTF8String:(const char *) sqlite3_column_text(statement, 1)];
NSInteger provinceId = sqlite3_column_int(statement, 2);
ProvinceInfo *p = [[ProvinceInfo alloc]init];
NSArray *proList = [p select:[NSString stringWithFormat:@"id = %d", provinceId]];
if (proList != nil && proList.count > 0) {
p = [proList objectAtIndex:0];
}
el.cityId = id;
el.cityName = name;
el.province = p;
[array addObject:el];
[el release];
}
sqlite3_close(dbUtil.db);
[dbUtil release];
return array;
}@end |