存储路径
NSString *documet=NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES)[0];
NSString *dataPath=[documet stringByAppendingString:@"/userdata.txt"];
NSLog(@"%@",dataPath);
NSMutableDictionary *dic=[NSMutableDictionary dictionaryWithContentsOfFile:dataPath];
提示按钮：
UIAlertView *alt=[[UIAlertView alloc]initWithTitle:@"请重新输入" message:@"用户名和密码不正确" delegate:self cancelButtonTitle:@"取消" otherButtonTitles:@"注册", nil];
[alt show];
如果已经登录，跳转，登录过后，提示框提示后，1秒自动消失。
if ([flage isEqualToString:@"NO"]) {
LogginNAController *lgnc=[[LogginNAController alloc]init];
[self presentViewController:lgnc animated:YES completion:nil];
}
else {
UIAlertView *alt=[[UIAlertView alloc]initWithTitle:@"提示" message:@"收藏成功" delegate:self cancelButtonTitle:nil otherButtonTitles: nil];
[alt show];
[self performSelector:@selector(dissMissAlter:) withObject:alt afterDelay:1.0];
}
NSLog(@"detialright");
}
-(void)dissMissAlter:(UIAlertView *)alert{
if (alert) {
[alert dismissWithClickedButtonIndex:[alert cancelButtonIndex] animated:YES];
}
观察图片更
--(void)observeValueForKeyPath:(NSString *)keyPath ofObject:(id)object change:(NSDictionary *)change context:(void *)context{
UIImage *newimage=change[NSKeyValueChangeNewKey];
if (newimage==nil) {
return;
}
NSArray *indexArry=[ self.tableView indexPathsForVisibleRows];
NSIndexPath *indexpath=(__bridge NSIndexPath *)(context);
if ([indexArry containsObject:indexpath]) {
ActivelistCell *cell=(ActivelistCell*)[self.tableView cellForRowAtIndexPath:indexpath];
cell.imageRightView.image=newimage;
[self.tableView reloadRowsAtIndexPaths:@[indexpath] withRowAnimation:UITableViewRowAnimationNone];
}
[object removeObserver:self forKeyPath:@"imagePicture"];
}
原文：http://www.cnblogs.com/ytmaylover/p/5049676.html