本文实例为大家分享了iOS中FMDB事务实现批量更新数据,供大家参考,具体内容如下
打开数据库(sqlite)
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///打开数据库
+ ( BOOL )openDataBase{
_TYDatabase = [[FMDatabase alloc]initWithPath:[self databasePath]];
if ([_TYDatabase open]) {
return YES;
}
return NO;
}
///数据库路径
+ (NSString *)databasePath{
NSString *documentPath = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) lastObject];
NSString *dataPath = [documentPath stringByAppendingPathComponent:@ "TY.SQLite" ];
NSFileManager *fileM = [NSFileManager defaultManager];
if (![fileM fileExistsAtPath:dataPath]) {
NSString *filePath = [[NSBundle mainBundle] pathForResource:@ "TY" ofType:@ "SQLite" ];
[fileM copyItemAtPath:filePath toPath:dataPath error:nil];
}
NSLog(@ "%@" ,dataPath);
return dataPath;
}
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事务
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/**
事务
arraySql:SQL语句数组
*/
- ( void )beginTransaction:(NSArray *)arraySql;
{
//// static FMDatabase *_TYDatabase = nil;
BOOL isOpen=[_TYDatabase open];
if (!isOpen) {
NSLog(@ "打开数据库失败!" );
return ;
}
///开始事物
[_TYDatabase beginTransaction];
BOOL isRollBack = NO;
@ try {
for ( int i = 0; i<arraySql.count; i++) {
BOOL result = [_TYDatabase executeUpdate:arraySql[i]];
if (!result) {
NSLog(@ "操作失败【%d】== SQL:%@" ,i,arraySql[i]);
}
}
}
@ catch (NSException *exception) {
isRollBack = YES;
///回滚
[_TYDatabase rollback];
}
@finally {
if (!isRollBack) {
///提交
[_TYDatabase commit];
}
}
[_TYDatabase close];
}
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多线程事务
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/**
多线程事务
arraySql:SQL语句数组
*/
+ ( void )beginTransactionT:(NSArray *)arraySql{
FMDatabaseQueue *databaseQueue = [FMDatabaseQueue databaseQueueWithPath:[self databasePath]];
[databaseQueue inTransaction:^(FMDatabase *db, BOOL *rollback) {
BOOL result = NO;
for ( int i = 0; i < arraySql.count; i++) {
result = [_TYDatabase executeUpdate:arraySql[i]];
}
if (result) {
NSLog(@ "成功" );
}
}];
}
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以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持服务器之家。
原文链接:http://www.cnblogs.com/wangkejia/p/7818236.html