Learn iOS Switch Button UISwitch Control

#import <UIKit/>

@interface ViewController : UIViewController{

 //Define a switch control //The function can change the state //On, OFF: Two states can be switched //All controls in UIKit framework library have started with UI //All Apple's official controls are defined in the UIKit framework library UISwitch * _mySwitch;

}

@property(retain,nonatomic) UISwitch * mySwitch;


@end

#import ""

@interface ViewController ()

@end

@implementation ViewController
@synthesize mySwitch=_mySwitch;

- (void)viewDidLoad {
 [super viewDidLoad];
 // Do any additional setup after loading the view, typically from a nib.

 //Create a switch object //Inherited from UIView _mySwitch = [[UISwitch alloc]init];

 //Apple's official control location settings //The value of position X and Y can be changed (100, 100) //Width and height values ​​cannot be changed (80, 40) are useless and will not work.  Default. _mySwitch.frame=CGRectMake(100, 200, 180, 40);

 //Switch status setting properties //YES:Open status //NO: Close status _mySwitch.on=YES;

 //You can also use the set function //[_mySwitch setOn:YES];

 //Set switch status //p1: Status settings //p2: Whether to start the graphics effect //[_mySwitch setOn:YES animated:YES];

 [ addSubview:_mySwitch];

 //Set the style color of the open state [_mySwitch setOnTintColor:[UIColor orangeColor]];

 //Set the style color of the switch circle button [_mySwitch setThumbTintColor:[UIColor blueColor]];

 //Set the overall style color, the white of the button is the background color of the entire parent layout [_mySwitch setTintColor:[UIColor greenColor]];

 //Add event function to switch control //p1: Function implementation object //p2: Function object //p3: Event type during event response triggers the function when the UIControlEventValueChanged state changes [_mySwitch addTarget:self action:@selector(swChange:) forControlEvents:UIControlEventValueChanged];


}

//Parameters are passed to the switch object itself- (void) swChange:(UISwitch*) sw{

 if(==YES){
  NSLog(@"Switch is turned on");
 }else{
  NSLog(@"Switch is turned off");
 }
}

- (void)didReceiveMemoryWarning {
 [super didReceiveMemoryWarning];
 // Dispose of any resources that can be recreated.
}

@end