UILabel to automatic line break when line is too long

My UILabel can do a line break according to the current \n . But if the line itself is too long, it won't be able to automatically do a line break. Can I do more configurations to my UILabel to achieve that?

And I've already used:

aLabel.lineBreakMode = UILineBreakModeWordWrap;
aLabel.numberOfLines = 0;
[aLabel setFont:[UIFont fontWithName:@"MarkerFelt-Wide" size:24]];
aLabel.textAlignment =  UITextAlignmentCenter;

CGRect labelFrame = aLabel.bounds;

labelFrame.size = [words siz开发者_如何学编程eWithFont:aLabel.font constrainedToSize:CGSizeMake(LABEL_WIDTH, 100000) lineBreakMode:aLabel.lineBreakMode];

aLabel.frame = CGRectMake(0, 0, aLabel.frame.size.width-10, labelFrame.size.height);

words is a NSString

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Set Number of line as you want to set.

aLabel.numberOfLines = 2;

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if you are having text in a paragraph and want to place it in a lable with differ lines no need to use UILineBreakModeWordWrap.. simply write one line code as in how many lines you want to place the text as

labobj.numberOfLines = 90;