Question

我想处理来自json的int值，即0。这是我的代码，但它无法运行，我的应用程序在运行时崩溃。

UILabel *like=(UILabel *)[cell viewWithTag:3];
if ([[json objectAtIndex:indexPath.row ]objectForKey:@"likes"] == (id)[NSNull null]) {
    like.text=@"-";
}
  else{
    like.text=[[json                                               objectAtIndex:indexPath.row]objectForKey:@"feed_text"];
}

这是我的回复

{
            "feed_id": "2",
            "group_id": "1",
            "group_name": "Church",
            "feed_text": "Hi+this+is+my+first+Post+in+Church+group",
            "likes": 0,
            "comments": 0,
            "latitude": "21.180407400000000000",
            "longitude": "66308dbc30ae53223f1213f793700381"
        }

任何人都知道如何处理零值？谢谢

Answer 1

这是我用来处理json中的0值的最终代码...

1000.times do

    puts "Press Enter"
    gets

        x = rand (0..5)
        y = rand (0..5)

        # "x" counter
        10.times do |xx|

            meter = rand (0..5)
            if xx < 9
                print meter
                print "\r"
                sleep 0.08
                else print x
            end
        end

    puts

        # "y" counter
        10.times do |yy|

            meter = rand (0..5)
            if yy < 9
                print meter
                print "\r"
                sleep 0.08
                else print y
            end
        end

    puts

end

你只需传递你的参数和在UILabel上设置标签，例如我已经设置了11并且它的工作就像一个魅力。我希望它会有用。

谢谢

Answer 2

if ([[[json objectAtIndex:indexPath.row ]objectForKey:@"likes"] intValue]==0) {
    like.text=@"-";
}
else{
    like.text=[[json objectAtIndex:indexPath.row]objectForKey:@"feed_text"];
}

Answer 3

global variable Bool flag;
flag=true;



- (IBAction)buttonHandlerTreatmentPointImageChange:(BLButton *)sender {
    __block CATransform3D transform;
    if (flag)
    {
        flag=false;
        transform = CATransform3DMakeRotation(-M_PI / 1.1, 0.0, 1.0, 0.0);
    }
    else
    {
         flag=true;
        transform = CATransform3DMakeRotation(0.0, 0.0, 1.0, 0.0);
    }
    [UIView animateWithDuration:1.0 delay:0.0 options:UIViewAnimationOptionCurveEaseIn animations:^{
        transform.m34 = 1.0f / 2500.0f;
        self.viewToFlip.layer.transform = transform;
    }
    completion:^(BOOL finished)
    {  
    }];
}

处理来自json的0值

3 个答案: