iOS - UISwitch

头文件

#import <UIKit/UIKit.h>

@interface ViewController : UIViewController{
    //定义开关文件
    UISwitch* _uiSwitch;
}

//定义属性uiSwitch
@property(retain, nonatomic) UISwitch* uiSwitch;

@end

源文件

#import "ViewController.h"

@interface ViewController ()

@end

@implementation ViewController

//同步属性和成员变量
@synthesize uiSwitch = _uiSwitch;

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.
    
    //初始化uiSwitch
    _uiSwitch = [[UISwitch alloc]init];
    //位置可改变、宽高是固定的所以无法改变，即后面两个数值无效
    _uiSwitch.frame = CGRectMake(100, 100, 200, 100);
    //开关开启
    _uiSwitch.on = YES;
    //[_uiSwitch setOn:YES];
    //[_uiSwitch setOn:YES animated:YES];
    
    //设置开启颜色
    [_uiSwitch setOnTintColor:[UIColor orangeColor]];
    
    //开关控件添加事件
    [_uiSwitch addTarget:self action:@selector(onswitch) forControlEvents:UIControlEventValueChanged];
    
    [self.view addSubview:_uiSwitch];
    
}

-(void) onswitch{
    if(_uiSwitch.on == YES){
        NSLog(@"开关被打开");
    }else{
        NSLog(@"开关被关闭");
    }
}

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


@end