【练习】UI控件

#import "ViewController.h"

@interface ViewController ()

@property (weak, nonatomic) IBOutlet UILabel *label;//拉Label

@property (weak, nonatomic) IBOutlet UIButton *button;//拉Button

@property (weak, nonatomic) IBOutlet UITextField *textField;//拉Text

@property (weak, nonatomic) IBOutlet UISegmentedControl *seg;//拉Seg

@end

@implementation ViewController

- (void)viewDidLoad {

    [super viewDidLoad];

    self.label.text=  @"123";//设置label显示字符“123”

    [self.button setTitle:@"点击" forState:UIControlStateNormal];//设置button显示为“点击”，属性为普通

    [self.button addTarget:self action:@selector(didClickBtn:) forControlEvents:UIControlEventTouchUpInside];

    //设置button响应 传递didClickBtn: 点击

    // Do any additional setup after loading the view, typically from a nib.

}

-  (void)didClickBtn:(UIButton*)sender{

    NSLog(@"点击了button 打印%@",sender);}

//自定义属性 点击button打印“@……” （sender：发送信息者。）

- (void)didReceiveMemoryWarning {

    [super didReceiveMemoryWarning];

    // Dispose of any resources that can be recreated

}

@end

//@selector(didclickBtn:)

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2018-07-21 13:51:42.232757+0800 10[3432:319062] 点击了button 打印>