UI基础--UISwitch

声明该类的对象:

#import <UIKit/UIKit.h>

@interface ViewController : UIViewController

{
    //定义一个开关控件(开和关)
    //所有UIKit框架库中控件均已UI开头
    //苹果官方的控件都定义在UIKit框架库中
    UISwitch *_myswitch;
}

@property (nonatomic, strong) UISwitch *myswitch;

@end

#import "ViewController.h"

@interface ViewController ()

@end

@implementation ViewController

/**
 *  同步属性和成员变量
 */
@synthesize myswitch = _myswitch;

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.
    
    //创建一个开关对象.
    _myswitch = [[UISwitch alloc]init];
    
    //苹果官方的控件的位置设置
    //位置x.y的值是可以改变的;
    //宽度和高度是无法改变的;
    _myswitch.frame = CGRectMake(100, 100, 80, 40);
    
    //开关状态设置
    _myswitch.on = YES;
    //设置开关状态
//    [_myswitch setOn:YES animated:YES];
    [self.view addSubview:_myswitch];
    
    //设置开启的颜色
    [_myswitch setOnTintColor:[UIColor redColor]];
    
    //设置圆钮颜色
    [_myswitch setThumbTintColor:[UIColor blueColor]];
    
    //设置整体风格
    [_myswitch setTintColor:[UIColor purpleColor]];
    
    //添加开关事件函数
    [_myswitch addTarget:self action:@selector(SwChange:) forControlEvents:UIControlEventValueChanged];
    
}

//
- (void)SwChange:(UISwitch *)myswitch{
    
    if (myswitch.on == YES) {
        NSLog(@"开关打开");
    }else{
        NSLog(@"开关关闭");
    }
    
}

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

//他的一些属性和方法:

NS_CLASS_AVAILABLE_IOS(2_0) __TVOS_PROHIBITED @interface UISwitch : UIControl <NSCoding>

@property(nullable, nonatomic, strong) UIColor *onTintColor NS_AVAILABLE_IOS(5_0) UI_APPEARANCE_SELECTOR;
@property(null_resettable, nonatomic, strong) UIColor *tintColor NS_AVAILABLE_IOS(6_0);
@property(nullable, nonatomic, strong) UIColor *thumbTintColor NS_AVAILABLE_IOS(6_0) UI_APPEARANCE_SELECTOR;

@property(nullable, nonatomic, strong) UIImage *onImage NS_AVAILABLE_IOS(6_0) UI_APPEARANCE_SELECTOR;
@property(nullable, nonatomic, strong) UIImage *offImage NS_AVAILABLE_IOS(6_0) UI_APPEARANCE_SELECTOR;

@property(nonatomic,getter=isOn) BOOL on;

- (instancetype)initWithFrame:(CGRect)frame NS_DESIGNATED_INITIALIZER;      // This class enforces a size appropriate for the control, and so the frame size is ignored.
- (nullable instancetype)initWithCoder:(NSCoder *)aDecoder NS_DESIGNATED_INITIALIZER;

- (void)setOn:(BOOL)on animated:(BOOL)animated; // does not send action

@end

NS_ASSUME_NONNULL_END