Label with dynamic height

The below code creates the dynamic height to fit for the inputed text

-(void)createDynamicHeight
{

UILabel *label = [[UILabel alloc]initWithFrame:CGRectMake(10, 0, 300, 40)];

label.backgroundColor = [UIColor blackColor];

[self.view addSubview:label];

NSString *text = @"This is label with dynamic height";

label.text = text;

label.lineBreakMode = UILineBreakModeWordWrap;

    

// resize the height to fit the content

CGSize newLabelSize = [text sizeWithFont:label.font 

                       constrainedToSize:label.frame.size

                           lineBreakMode:UILineBreakModeWordWrap];

    

CGRect newFrame = instructions.frame;

if (newLabelSize.height > 40) {

      newFrame.size.height = newLabelSize.height;

} else {

      newFrame.size.height = 40

}

label.frame = newFrame;

label.numberOfLines = 0;

NSLog(@"Label height is %f", label.frame.size.height);

}

Set multi-lines in the label

Set the lines = 0 in the label tab, then the text can be shown as the multi-line in the UILabel. Actually it can be done in code too.

Display the multi-lines in the UILabel

To use NSString method, "sizeWithFont:constrainedToSize: lineBreakMode:"

It figure out the UILabel size to accommodate the long String.

//  init the content of string

NSString *string = @"Cocos2d-x open source project is C++ version of cocos2d-iphone. We focus on making cocos2d framework cross multiple platforms. Mobile games can be written on the top of cocos2d-x in C++ or Lua language, via the COMPLETELY SAME API as cocos2d-iphone, they can easily be built & run on iOS, Android, Samsung Bada and BlackBerry Tablet OS. Cocos2d-x also supports Windows & Linux, therefore we can debug source code easily and write editors on desktop operating systems."; 

// Determine the size of UILabel for the string

CGSize aSize = [string sizeWithFont: [UIFont systemFontOfSize:18] constrainedToSize:CGSizeMake(250.0, 999.0) lineBreakMode:UILineBreakModeWordWrap]; 

 // Declare UILabel,

UILabel *label = [[UILabel alloc] initWithFrame: CGRectMake(20, 20, aSize.width, aSize.height)]; 

 // init the label

label.backgroundColor = [UIColor grayColor]; 

label.textColor = [UIColor redColor]; 

label.font = UIFont systemFontOfSize:18;

label.lineBreakMode = UILineBreakModeWordWrap; 

label.text = string; 

label.numberOfLines = 0;  

[self.view addSubview:label];