Assigning large string to UILabel. And, adding this label into a scroll view.
The UILabel disappear when the UILabel height larger than 8192pt (which is 2^13).
Is this an iOS bug?
And should I use other implementation to render such amount of string?
Should I use table view with cell?
UPDATE
The code that will display the UILabel:
UILabel *label = [[UILabel alloc] init];
label.backgroundColor = [UIColor clearColor];
label.text = rumor.displayText;
label.frame = CGRectMake(0, 0, self.view.frame.size.width, 8192);
label.lineBreakMode = UILineBreakModeWordWrap;
label.numberOfLines = 0;
And the code that UILabel does disappear
UILabel *label = [[UILabel alloc] init];
label.backgroundColor = [UIColor clearColor];
label.text = rumor.displayText;
label.frame = CGRectMake(0, 0, self.view.frame.size.width, 8193);
label.lineBreakMode = UILineBreakModeWordWrap;
label.numberOfLines = 0;
First of all - it doesn't have to be a bug. It is just undefined behavior. Note that with every component, there will be some upper size limit when the component stops working correctly . 8192 points seems to be a low limit but still it's about 8 times the iPad screen in portrait mode.
You are not supposed to make views that big. Note that UIView
s are often rendered into memory and buffered, to make redrawing faster. With 8192 height, the buffer will have to be very big.
Splitting the text into several UILabel
s (e.g. by paragraph) would definitely be an improvement.
See https://stackoverflow.com/a/1494496/669586
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