我试图让UILabel在UIScrollView内部滚动,但它不会滚动

Question

这是在我的.m

- (void)viewDidLoad
{
    [super viewDidLoad];
    [self.scrollView addSubview:self.contentView];
    self.scrollView.contentSize = self.contentView.bounds.size;
    NSNumberFormatter *numberFormatter = [[NSNumberFormatter alloc] init];

    NSMutableArray *arr = [[NSMutableArray alloc]init];
    arr = [Singleton getArray];

    NSString *str = [arr componentsJoinedByString:@"\n"];
    summaryLabel.text = str;
}

这是我的.h

@interface TotalViewController : UIViewController
{
    UIScrollView *scrollView;
    UIView *contentView;

}
@property (nonatomic, retain) IBOutlet UIScrollView * scrollView;
@property (nonatomic, retain) IBOutlet UIView       * contentView;
@property (nonatomic,strong) IBOutlet UILabel       * summaryLabel;

我的标签连接到视图控制器,我的contentView连接到视图控制器,我的summaryLabel连接到视图控制器.我需要标签滚动而不是.

Answer 1

一个非常简单的答案,如果你只想要一个可滚动的标签,那就是使用UITextView(参考).禁用编辑,您将获得一个可滚动的标签.

(几乎逐字逐句:如何向UILabel添加滚动功能)

Answer 2

如果UIScrollView的内容不大于其可见区域,则不会滚动.考虑到在设置scrollview的contentSize后将文本分配给标签,这种情况不太可能正确发生.我会尝试这样的事......

- (void)viewDidLoad
{
    [super viewDidLoad];
    [self.scrollView addSubview:summaryLabel];

    .....

    summaryLabel.text = str;

    // Assuming your label has numberOfLines = 0, and you want to scroll vertical
    CGSize maxSize = CGSizeMake(summaryLabel.frame.size.width, CGFLOAT_MAX);
    CGSize labelSize = [summaryLabel sizeThatFits:maxSize];
    scrollview.contentSize = labelSize;
}