FMDatabase 的使用方法
#define myTable @"myTables"
#define name @"name"
#define age @"age"
#define pic @"pic"
@interface FMDataHelper ()
@property (nonatomic, strong)FMDatabase *db;
@end
***
1.数据库路径
***
- (NSString *)getTablePath{
NSArray *docuPaths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
return [[docuPaths firstObject] stringByAppendingPathComponent:myTable];
}
***
2.创建表
****
- (void)createTableData{
self.db = [FMDatabase databaseWithPath:[self getTablePath]];
NSLog(@"dataBase_path ===== %@",self.db.databasePath);
if ([self.db open]) {
NSString *sqrStr = [NSString stringWithFormat:@"create table if not exists %@ (%@ text, %@ integer, %@ blob)",myTable,name,age, pic ];
BOOL results = [self.db executeUpdate:sqrStr];
if (results) {
NSLog(@"创建成功");
}
else{
NSLog(@"创建失败");
}
[self.db close];
}
}
***
3.插入数据
***
-(void)insertDataWithName:(NSString *)nameValue ageValue:(NSInteger)ageValue picValue:(NSData *)picValue{
// [self.db beginTransaction];
if ([self.db open]) {
[_db beginTransaction];//开启事物（）
NSString *sqrStr = [NSString stringWithFormat:@"INSERT INTO '%@' ('%@', '%@', '%@') VALUES (?, ? ,?)",myTable,name,age,pic];BOOL results = [self.db executeUpdate:sqrStr,nameValue,[NSNumber numberWithInteger:ageValue],picValue];
if (results) {
NSLog(@"插入成功");
}
else{
NSLog(@"插入失败");
}
[self.db commit]; //提交事物
[self.db close];
}
}
***
4.查询数据库数据，保存到model中，存入数组中返回
***
-(NSMutableArray *)selectData{
NSMutableArray *arr = [NSMutableArray arrayWithCapacity:1];
if ([self.db open]) {
NSString *sqrStr = [NSString stringWithFormat:@"select * from %@",myTable];
FMResultSet *results = [self.db executeQuery:sqrStr];
while ([results next]) {
Model *model = [[Model alloc] init];
model.nameValue = [results stringForColumn:name];
model.picValue = [results dataForColumn:pic];
model.ageValue = [results intForColumn:age];
[arr addObject:model];
}
// [results close];
[self.db close];
}
return arr;
}