UIKit之UIButton

#import "TestController.h"

@interface TestController ()
@property (strong, nonatomic)UIButton *btn;
@end

@implementation TestController

- (void)viewDidLoad {
    [super viewDidLoad];
 
    //获取标题
    NSString*s1 = [self.btn titleForState:UIControlStateNormal];
    //获取颜色
    UIColor*color1 = [self.btn titleColorForState:UIControlStateNormal];
}


#pragma mark - lazyload
- (UIButton *)btn{
    if (!_btn) {
        _btn = [UIButton buttonWithType:UIButtonTypeSystem];
        _btn.backgroundColor = [UIColor grayColor];
        // 设置标题
        [_btn setTitle:@"点我啊"forState:UIControlStateNormal];
        [self.view addSubview: _btn];

        //设置前景图片(1.覆盖标题2.不会拉伸3.必须是镂空图)
        //[btn setImage:[UIImage imageNamed:@"2x.png"] forState:UIControlStateNormal];
        //设值背景图片
        //[btn setBackgroundImage:[UIImage imageNamed:@"11"] forState:UIControlStateNormal];
        

        //设置标题颜色
        [_btn setTitleColor:[UIColor redColor]forState:UIControlStateNormal];
        //设置阴影
        [_btn setTitleShadowColor:[UIColor greenColor]forState:UIControlStateNormal];
        
        [_btn mas_makeConstraints:^(MASConstraintMaker *make) {
            make.left.top.offset(100);
            make.size.mas_equalTo(CGSizeMake(100, 100));
        }];
        
        [_btn bk_addEventHandler:^(id  _Nonnull sender) {
            NSLog(@"点击了按钮");
        } forControlEvents:UIControlEventTouchUpInside];
    }
    return _btn;
}


@end