xcode object c 代码添加控件

DataViewController.h头文件中的代码

#import <UIKit/UIKit.h>

@interface DataViewController : UIViewController

@property (strong, nonatomic) UISwitch *mySwitch;

DataViewController.m文件中的代码

#import "DataViewController.h"

@interface DataViewController ()

@end

@implementation DataViewController

@synthesize mySwitch;

-(IBAction)addSwitch

{

    self.mySwitch = [[UISwitch alloc] initWithFrame:CGRectMake(30,30,0,0)];

    [self.mySwitch setOn:true];

    [self.view addSubview:self.mySwitch];

}