Swift Cheat Sheet (Snippet Code)

swift.cheat

Swift Cheatsheet (Snippet Code)
===================



### UIAlertView
```
var title = "Error"
var message = "Your Error Message!"

var alert = UIAlertController(title: title, message: message, preferredStyle: UIAlertControllerStyle.Alert)
alert.addAction(UIAlertAction(title: "OK", style: UIAlertActionStyle.Default, handler: nil))

self.presentViewController(alert, animated: true, completion: nil)
```


### Perform Segue
```
self.performSegueWithIdentifier("dashboard", sender: self)
```


### Insert icon in the UITextField
```
var imageView = UIImageView();
var image = UIImage(named: "user.png");
imageView.image = image;
username.leftView = imageView;
username.leftViewMode = UITextFieldViewMode.Always
imageView.frame = CGRect(x: 100, y: 100, width: 30, height: 20)
view.addSubview(imageView)
```

### Change Placeholder Color
```
txtField.attributedPlaceholder = NSAttributedString(string:" Username",
attributes:[NSForegroundColorAttributeName: UIColor.blueColor()])
```

### Change UIButton border color
```
btn1.layer.borderColor = UIColor.blueColor().CGColor
btn1.layer.borderWidth = 1.0
```

### Change UIButton Font
```
btn1.titleLabel?.font = UIFont.boldSystemFontOfSize(15.0)
```

### Change UITextField border color
```
txt1.layer.borderColor = UIColor.blueColor().CGColor
txt1.layer.borderWidth = 1.0
```

### Dismiss keyboard with swipe gestures
```
var swipe: UISwipeGestureRecognizer = UISwipeGestureRecognizer(target: self, action: "dismissKeyboard")
swipe.direction = UISwipeGestureRecognizerDirection.Down
self.view.addGestureRecognizer(swipe)

func dismissKeyboard() {
    self.txt1.resignFirstResponder()
}
```

### Add delay before executing your code
```
let delayTime = dispatch_time(DISPATCH_TIME_NOW, Int64(utilities.randomProcessTime() * Double(NSEC_PER_SEC)))
dispatch_after(delayTime, dispatch_get_main_queue()) {
	// enter your code here ...
}
```

### Hide UINavigation Controller
```
navigationController?.navigationBarHidden = false
```

### Disable auto swipe
```
self.navigationController?.interactivePopGestureRecognizer.enabled = false
```

### Pop ViewController
```
self.navigationController?.popViewControllerAnimated(true)
```