ScrollView在ViewController中不起作用

Question

I have two labels in ViewController, one of them dynamically change, because length of data is different(I get data from JSON file). I tried use self.automaticallyAdjustsScrollViewInsets = NO; but doesn't work. I added ScrollView to my ViewController.

- (void)viewDidLoad {
[super viewDidLoad];
self.automaticallyAdjustsScrollViewInsets = NO;
NSLog(@"hjgjgjk==%@",detailArray);

NSDictionary *dictionary = [detailArray mutableCopy];
expressionLabel.text = [dictionary objectForKey:@"expression"];

meaningLabel.text = [dictionary objectForKey:@"meaning"];

Could you explain me, which way should I go?

Answer 1

I hope you've added labels on scrollview.

Please add below line after adding text to labels.

self.automaticallyAdjustsScrollViewInsets = NO;

Which in your case must be

NSLog(@"hjgjgjk==%@",detailArray);

NSDictionary *dictionary = [detailArray mutableCopy];
expressionLabel.text = [dictionary objectForKey:@"expression"];

meaningLabel.text = [dictionary objectForKey:@"meaning"];

self.automaticallyAdjustsScrollViewInsets = NO;

My suggestion of doing this is like below:

UIScrollView *scrollView= [UIScrollView new];
    scrollView.translatesAutoresizingMaskIntoConstraints = NO;
    [self.view addSubview:scrollView];

    UILabel *scrollViewLabel = [[UILabel alloc] init];
    scrollViewLabel.numberOfLines = 0;
    scrollViewLabel.translatesAutoresizingMaskIntoConstraints = NO;
    [scrollView addSubview:scrollViewLabel];

    scrollViewLabel.text = @"Hello world.Hello world.Hello world.Hello world.Hello world.Hello world.Hello world.Hello world.Hello world.Hello world.Hello world.Hello world.Hello world.Hello world.Hello world.Hello world.Hello world.Hello world.Hello world.Hello world.Hello world.Hello world.Hello world.Hello world.Hello world.Hello world.Hello world.Hello world.Hello world.Hello world.Hello world.Hello world.Hello world.Hello world.Hello world.Hello world.Hello world.Hello world.Hello world.Hello world.Hello world.Hello world.Hello world.Hello world.Hello world.Hello world.Hello world.Hello world.Hello world.Hello world.Hello world.Hello world.Hello world.Hello world.Hello world.Hello world.";


    /*** Auto Layout ***/

    NSDictionary *views = NSDictionaryOfVariableBindings(scrollView, scrollViewLabel);

    NSArray *scrollViewLabelConstraints = [NSLayoutConstraint constraintsWithVisualFormat:@"H:|[scrollViewLabel(scrollView)]" options:0 metrics:nil views:views];
    [scrollView addConstraints:scrollViewLabelConstraints];

    scrollViewLabelConstraints = [NSLayoutConstraint constraintsWithVisualFormat:@"V:|[scrollViewLabel]|" options:0 metrics:nil views:views];
    [scrollView addConstraints:scrollViewLabelConstraints];

    NSArray *scrollViewConstraints = [NSLayoutConstraint constraintsWithVisualFormat:@"H:|-[scrollView]-|" options:0 metrics:nil views:views];
    [self.view addConstraints:scrollViewConstraints];

    scrollViewConstraints = [NSLayoutConstraint constraintsWithVisualFormat:@"V:|-[scrollView]-|" options:0 metrics:nil views:views];
    [self.view addConstraints:scrollViewConstraints]; 

For two(or more views) labels set horizontally:

    UIScrollView *scrollView= [UIScrollView new];
    scrollView.translatesAutoresizingMaskIntoConstraints = NO;
    [self.view addSubview:scrollView];

    UILabel *scrollViewLabel = [[UILabel alloc] init];
    scrollViewLabel.numberOfLines = 0;
    scrollViewLabel.translatesAutoresizingMaskIntoConstraints = NO;
    [scrollView addSubview:scrollViewLabel];

    UILabel *scrollViewLabel2 = [[UILabel alloc] init];
    scrollViewLabel2.numberOfLines = 0;
    scrollViewLabel2.translatesAutoresizingMaskIntoConstraints = NO;
    [scrollView addSubview:scrollViewLabel2];

    scrollViewLabel.text = @"Hello world.Hello world.Hello world.Hello world.Hello world.Hello world.Hello world.Hello world.Hello world.Hello world.Hello world.Hello world.Hello world.Hello world.Hello world.Hello world.Hello world.Hello world.Hello world.Hello world.Hello world.Hello world.Hello world.Hello world.Hello world.Hello world.Hello world.Hello world.Hello world.Hello world.Hello world.Hello world.Hello world.Hello world.Hello world.Hello world.Hello world.Hello world.Hello world.Hello world.Hello world.Hello world.Hello world.Hello world.Hello world.Hello world.Hello world.Hello world.Hello world.Hello world.Hello world.Hello world.Hello world.Hello world.Hello world.Hello world.Hello world.Hello world.Hello world.Hello world.Hello world.Hello world.Hello world.Hello world.Hello world.Hello world.Hello world.Hello world.Hello world.Hello world.Hello world.Hello world.Hello world.Hello world.Hello world.Hello world.Hello world.Hello world.Hello world.Hello world.Hello world.Hello world.Hello world.Hello world.Hello world.Hello world.Hello world.Hello world.Hello world.Hello world.Hello world.Hello world.Hello world.Hello world.Hello world.Hello world.Hello world.Hello world.Hello world.Hello world.Hello world.Hello world.Hello world.Hello world.Hello world.Hello world.Hello world.Hello world.Hello world.Hello world.Hello world.Hello world.";


  scrollViewLabel2.text = @"Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.Hi there.";

    /*** Auto Layout ***/

     //scrollviewLabel
    NSDictionary *views = NSDictionaryOfVariableBindings(scrollView, scrollViewLabel, scrollViewLabel2);

    NSArray *scrollViewLabelConstraints = [NSLayoutConstraint constraintsWithVisualFormat:@"H:|[scrollViewLabel(scrollView)]" options:0 metrics:nil views:views];
    [scrollView addConstraints:scrollViewLabelConstraints];

    scrollViewLabelConstraints = [NSLayoutConstraint constraintsWithVisualFormat:@"V:|[scrollViewLabel]|" options:0 metrics:nil views:views];
    [scrollView addConstraints:scrollViewLabelConstraints];


    //scrollviewLabel2
    NSArray *scrollViewLabel2Constraints = [NSLayoutConstraint
                                 constraintsWithVisualFormat:@"|-[scrollViewLabel]-[scrollViewLabel2(==scrollViewLabel)]-|"
                                 options:NSLayoutFormatAlignAllBaseline metrics:nil
                                 views:views];
    [scrollView addConstraints:scrollViewLabel2Constraints];


    //scrollview
    NSArray *scrollViewConstraints = [NSLayoutConstraint constraintsWithVisualFormat:@"H:|-[scrollView]-|" options:0 metrics:nil views:views];
    [self.view addConstraints:scrollViewConstraints];

    scrollViewConstraints = [NSLayoutConstraint constraintsWithVisualFormat:@"V:|-[scrollView]-|" options:0 metrics:nil views:views];
    [self.view addConstraints:scrollViewConstraints];

Hope this helps.