iOS 开发笔记（三）

Posted on | Edited on | In |

UITableViewCell 左滑删除功能

开启编辑模式

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- (BOOL)tableView:(UITableView *)tableView canEditRowAtIndexPath:(NSIndexPath *)indexPath {
    return YES;
}

事件类型

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- (UITableViewCellEditingStyle)tableView:(UITableView *)tableView editingStyleForRowAtIndexPath:(NSIndexPath *)indexPath{
   return UITableViewCellEditingStyleDelete;
}

删除按钮标题

UITableViewCellEditingStyleDelete默认就是删除，可以不用实现该方法

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- (NSString *)tableView:(UITableView *)tableView titleForDeleteConfirmationButtonForRowAtIndexPath:(NSIndexPath *)indexPath
{
    return @"删除";
}

事件提交

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- (void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath{
    [self fy_showTitle:@"是否删除" message:nil confirmHandler:^{
        AylaShare *share = _shares[indexPath.row];
        [self deleteShare:share];
    } cancelHandler:nil];
}

退出键盘

在viewWillDisappear:中调用有奇效

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[self.view endEditing:YES];

联网时显示导航栏的菊花

优化用户体验

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[UIApplication sharedApplication].networkActivityIndicatorVisible = YES;

获取UIView的所有子类

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Class * classes = NULL;
int numClasses = objc_getClassList(NULL, 0);

if (numClasses > 0 )
{
    classes = malloc(sizeof(Class) * numClasses);
    numClasses = objc_getClassList(classes, numClasses);

    for (int i = 0; i < numClasses; ++i){
        if (class_getSuperclass(classes[i]) == [UIView class]){
            NSLog(@"%@", NSStringFromClass(classes[i]));
        }
    }

    free(classes);
}

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