The Colorful UILabel in iOS deve

# The Colorful UILabel in iOS development

---

Once up on a time,I had a request which needed to display a colorful UILabel in the screen.

The product manager said the colorful texts can catch the eyes of audiences.

OK,I sure chose to believe them.

Then,I had a question:

## 1. How to set different colors to each word in the UILabel?

---

I started my work with my own ideas:

- An UILabel can display the texts;

- The color of the texts can be set by 'UILabel.textColor';

- Adding two UILabels with different colors will do;

- Excellent! (I said to myself).

I opened the Xcode.app to edit my codes like this:

### 1.1 The way I did in the past time

```

/**

Initializes a colorful label container view

- returns: A colorful label container view instance

*/

func initColorfulLabel() -> UIView {

let containerViewFrame:CGRect = CGRect(x: -7, y: 100, width: self.view.bounds.width, height: 20);

let containerView:UIView = UIView(frame: containerViewFrame);

let redLabelFrame = CGRect(x: 0, y: 0, width: containerView.bounds.width / 2, height: 20);

let redLabel:UILabel = UILabel(frame: redLabelFrame);

redLabel.text = "RED";

redLabel.textColor = UIColor.redColor();

redLabel.textAlignment = NSTextAlignment.Right;

containerView.addSubview(redLabel);

let blueLabelFrame = CGRect(x: containerView.bounds.width / 2, y: 0, width: containerView.bounds.width / 2, height: 20);

let blueLabel:UILabel = UILabel(frame: blueLabelFrame);

blueLabel.text = " BLUE";

blueLabel.textColor = UIColor.blueColor();

blueLabel.textAlignment = NSTextAlignment.Left;

containerView.addSubview(blueLabel);

return containerView;

}

```

Oh,My God,It worked! ^0^:


### 1.2 The suggested way a mentor told me recently

My mentor told me that UILabel supports different texts with different colors by setting UILabel's attributedText.

Here is the newer one:

```

/**

Initializes a real colorful UILabel instance instead of a container view,this method is guided by a mentor

- returns: A real colorful UILabel instance

*/

func initColorfulLabelOfMentor() -> UILabel {

let str:NSMutableAttributedString = NSMutableAttributedString(string: "RED BLUE");

str.addAttribute(NSForegroundColorAttributeName, value: UIColor.redColor(), range: NSMakeRange(0, 3));

str.addAttribute(NSForegroundColorAttributeName, value: UIColor.blueColor(), range: NSMakeRange(4, 4));

let labelFrame = CGRect(x: 0, y: 140, width: self.view.bounds.width, height: 20);

let label:UILabel = UILabel(frame: labelFrame);

label.attributedText = str;

label.textAlignment = NSTextAlignment.Center;

return label;

}

```

It works too:


After I made the colorful texts in the screen,the product manager said we still need to add a shadow to the text, and again, for catching the eyes of audiences.

OK,I would do it. Because I always chose to believe them.

So,I had a new question here:

## 2. How to add a shadow to the words in UILabel?

---

I started my thinking again,of course I chose to add two different UILabels to make the shadow:

- Add an UILabel to display the given texts with certain color(color of the shadow);

- Add another UILabel to display the texts with shadow color;

- Put the two UILabels together into a container UIView to make a shadow;

- Return the UIView instance called 'containerView'.

So,I put my ideas into codes:

### 2.1 The way I did in the past time

Here is the implementation of my idea:

```

/**

Initializes a shadow label container view

- returns: A UIView instance which contains two UILabels to display a shadow

*/

func initShadowLabel() -> UIView {

let containerViewFrame:CGRect = CGRect(x: 0, y: 180, width: self.view.bounds.width, height: 20);

let containerView:UIView = UIView(frame: containerViewFrame);

let lowerLabelFrame = CGRect(x: 1, y: 1, width: self.view.bounds.width, height: 20);

let lowerLabel:UILabel = UILabel(frame: lowerLabelFrame);

lowerLabel.text = "LABEL WITH SHADOW";

lowerLabel.textColor = UIColor.blueColor();

lowerLabel.textAlignment = NSTextAlignment.Center;

containerView.addSubview(lowerLabel);

let upperLabelFrame = CGRect(x: 0, y: 0, width: self.view.bounds.width, height: 20);

let upperLabel:UILabel = UILabel(frame: upperLabelFrame);

upperLabel.text = "LABEL WITH SHADOW";

upperLabel.textColor = UIColor.redColor();

upperLabel.textAlignment = NSTextAlignment.Center;

containerView.addSubview(upperLabel);

return containerView;

}

```

Oh,My God,It worked again:


### 2.2 The suggested way of a mentor

Once again,a mentor occured,And he gave me another way to implement the shadow in UILabel:

```

/**

Initializes a real shadow UILabel instance instead of a container view,this method is guided by a mentor

- returns: A UILabel which has a shadow

*/

func initShadowLabelOfMentor() -> UILabel {

let labelFrame = CGRect(x: 0, y: 220, width: self.view.bounds.width, height: 20);

let label:UILabel = UILabel(frame: labelFrame);

label.text = "LABEL WITH SHADOW";

label.textColor = UIColor.redColor();

label.shadowColor = UIColor.blueColor();

label.shadowOffset = CGSize(width: 1, height: 1);

label.textAlignment = NSTextAlignment.Center;

return label;

}

```

See? It is more simple and clearer.

Here is the result in picture:


## 3. Source Code:

You can find all the codes [Here](https://github.com/acttos/ColorfulLabel){:target="_blank"}.