小编var*_*run的帖子

我想点击按钮滑动单元格.我在刷细胞方面取得了成功.但是我想要按下单元格中的按钮.我的代码是

- (NSArray *)tableView:(UITableView *)tableView editActionsForRowAtIndexPath:(NSIndexPath *)indexPath
{
    static NSString *simpleTableIdentifier = @"SimpleCell";
    SimpleCell *cell = (SimpleCell *)[tableView dequeueReusableCellWithIdentifier:simpleTableIdentifier];
    if (cell == nil)
    {
        NSArray *nib = [[NSBundle mainBundle] loadNibNamed:@"SimpleCell" owner:self options:nil];
        cell = [nib objectAtIndex:0];
    }
    SimpleCell *cekks=[[SimpleCell alloc]init];
    cekks.scrollButton.alpha =0.0;

    NSString *titleString;
    UIButton *sender = [[UIButton alloc]init];
    //[sender setBackgroundImage:[UIImage imageNamed:@"swipe.png"] forState:UIControlStateNormal];
    sender.tag = indexPath.row;

    titleString =@"Send A Gift";
    UITableViewRowAction *sendAGift = [UITableViewRowAction rowActionWithStyle:UITableViewRowActionStyleNormal title:titleString handler:^(UITableViewRowAction *action, NSIndexPath *indexPath){
       // [self deleteMail:[NSArray arrayWithObject:indexPath]:YES];

    }];

    [sendAGift setBackgroundColor:[UIColor colorWithPatternImage:[UIImage imageNamed:@"swipe.png"]]];



    return …

我希望在我的iOS应用程序中有一个旋转饼图.我发现MDRotatingPieChart控件似乎完成了我需要的大部分操作.但是当我将它放入非(0,0)原点并开始拖动时,它也会改变饼图的X和Y位置.它不应该这样做.有人可以帮帮我吗？

这是相似的代码

pieChart = MDRotatingPieChart(frame: CGRect(x: 30, y: 30, width: view.frame.width + 30 , height: view.frame.width + 30 ))

在里面MDRotatingPieChart:

override func continueTracking(_ touch: UITouch, with event: UIEvent?) -> Bool {
    hasBeenDraged = true
    let currentPoint = touch.location(in: self)
    let deltaX = currentPoint.x - pieChartCenter.x - 15
    let deltaY = currentPoint.y - pieChartCenter.y - 15
    let ang = atan2(deltaY,deltaX);
    let angleDifference = delta - ang
    self.transform = self.transform.rotated(by: -angleDifference)
    let savedTransform = slicesArray[0].labelObj?.transform
    let savedTransformCenter = …

response从取得我的照片时得到了以下内容Instagram。请帮助任何帮助，将不胜感激。

{ 
code = 403;
    "error_message" = "Invalid signed-request: Missing required parameter 'sig'";
    "error_type" = OAuthForbiddenException;
}

这是我的代码

  NSURL *url = [NSURL URLWithString:@"https://api.instagram.com/v1/tags/nofilter/media/recent?access_token=...........aef2"];
    NSURLRequest *urlRequest = [NSURLRequest requestWithURL:url];
    NSOperationQueue *queue = [[NSOperationQueue alloc] init];
    [NSURLConnection sendAsynchronousRequest:urlRequest queue:queue completionHandler:^(NSURLResponse *response, NSData *data, NSError *error) {            
   if (error){
        }
        else {   
            NSString * a = [[NSString alloc] initWithData:data encoding:NSASCIIStringEncoding];
            NSDictionary *tokenData = [jResponse objectWithString:a];
            NSLog(@"%@",tokenData);

        }
    }];

是否可以placeholder在中间对齐UITextField？当我们开始编辑它应该从左角开始UITextField？我是iOS新手.