Target Action And UIControl

Target Action And UIControl

target-action的设计模式

   UIButton *button = [UIButton buttonWithType:UIButtonTypeSystem];
    button.frame = CGRectMake(135, 100, 80, 40);
    [button setTitle:@"??" forState:UIControlStateNormal];
    button.backgroundColor = [UIColor colorWithRed:0.510 green:0.983 blue:1.000 alpha:1.000];
    button.titleLabel.font = [UIFont systemFontOfSize:30];
    [button setTintColor:[UIColor whiteColor]];
//    button.showsTouchWhenHighlighted = YES;
    [button addTarget:self action:@selector(press:) forControlEvents:UIControlEventTouchUpInside];
    [self.view addSubview:button];

- (void)press:(UIButton *)button {
    button.backgroundColor = [UIColor colorWithRed:arc4random() % 256 / 255. green:arc4random() % 256 / 255. blue:arc4random() % 256 / 255. alpha:1.000];
}

   target-action的设计模式(目标动作机制)

    多用于view的设计, 用于降低耦合性

    UIControl, 继承于UIView, 内部封装了tar get-action的设计模式

   TouchViewProPro *touchViewProPro = [[TouchViewProPro alloc] initWithFrame:CGRectMake(130, 320, 100, 100)];
    touchViewProPro.backgroundColor = [UIColor orangeColor];
    [touchViewProPro addTarget:self action:@selector(change:) forControlEvents:UIControlEventTouchUpInside];
    [self.view addSubview:touchViewProPro];
    [touchViewProPro release];
- (void)change:(TouchViewProPro *)view {
//    NSLog(@"change");
    打印当前方法的名字
    NSLog(@"%s", __FUNCTION__);
    打印行数
    NSLog(@"%d", __LINE__);
    移除某个方法
    [view removeTarget:self action:@selector(change:) forControlEvents:UIControlEventTouchUpInside];
}

   UIControl的子类

    1.UIButton, 按钮

    2.UITextField, 单行文本输入框

    3.UISegmentedControl, 分段控制器

    4.UISlider, 滑块

    5.UIStepper, 计步器

    创建一个BUtton
    UIButton *button = [UIButton buttonWithType:UIButtonTypeSystem];
    button.frame = CGRectMake(140, 80, 80, 40);
    button.backgroundColor = [UIColor blueColor];
    [button setTitle:@"??" forState:UIControlStateNormal];
    [button addTarget:self action:@selector(pressButton) forControlEvents:UIControlEventTouchUpInside];
    [self.view addSubview:button];

    创建TextField
    textField = [[UITextField alloc] initWithFrame:CGRectMake(100, 160, 375 - 200, 40)];
    textField.borderStyle = UITextBorderStyleRoundedRect;
    textField.placeholder = @" TextField";
    textField.text = @"吃饭";
    [self.view addSubview:textField];
    [textField release];

    UISegmentedControl, 分段控制器, 继承于UIControl
    NSArray *array = [NSArray arrayWithObjects:@"吃饭", @"睡觉", @"打豆豆", nil];
    UISegmentedControl *segmentedControl = [[UISegmentedControl alloc] initWithItems:array];
    segmentedControl.frame = CGRectMake(100, 220, 375 - 200, 40);
    segmentedControl.backgroundColor = [UIColor whiteColor];
    属性
    默认选中哪个分段
    注: 设置选中某个分段, 只修改了样式, 没有触发关联的方法
    segmentedControl.selectedSegmentIndex = 0;
    渲染色, 默认是蓝色
    segmentedControl.tintColor = [UIColor colorWithRed:0.000 green:0.502 blue:1.000 alpha:1.000];
   [segmentedControl addTarget:self action:@selector(change:) forControlEvents:UIControlEventValueChanged];
    segmentedControl.tag = 100;
    [self.view addSubview:segmentedControl];
    [segmentedControl release];

    UISlider, 滑块, 继承于UIControl
   UISlider *slider = [[UISlider alloc] initWithFrame:CGRectMake(100, 280, 375 - 200, 40)];
    最大值, 默认: 1.0
    slider.maximumValue = 100;
    最小值, 默认: 0.0
    slider.minimumValue = 50;
    当前值, 默认为最小值
    slider.value = 62.5;
    划过去的轨道颜色, 默认蓝色
    slider.minimumTrackTintColor = [UIColor redColor];
    未划过去的轨道颜色, 默认浅灰色
    slider.maximumTrackTintColor = [UIColor greenColor];
    设置滑块的颜色
    [slider setThumbTintColor:[UIColor blueColor]];
    关联方法
    [slider addTarget:self action:@selector(slide:) forControlEvents:UIControlEventValueChanged];
    [self.view addSubview:slider];
    [slider release];

    UIStepper, 计步器, 继承于UIControl
    UIStepper *stepper = [[UIStepper alloc] initWithFrame:CGRectMake(140, 340, 375 - 200, 40)];
    最小值, 默认0.0
    stepper.minimumValue = 1;
    最大值, 默认100
    stepper.maximumValue = 10;
    当前值
    stepper.value = 5;
    改变量, 默认1
    stepper.stepValue = 2;
    渲染色
    stepper.tintColor = [UIColor colorWithRed:1.000 green:0.521 blue:0.342 alpha:1.000];
    关联方法
    [stepper addTarget:self action:@selector(step:) forControlEvents:UIControlEventValueChanged];
    [self.view addSubview:stepper];
    [stepper release];
}

- (void)step:(UIStepper *)stepper {
    NSLog(@"%s", __FUNCTION__);
    NSLog(@"value = %.2f", stepper.value);
}

- (void)slide:(UISlider *)slider {
    NSLog(@"%s", __FUNCTION__);
    NSLog(@"%.2lf", slider.value);

}

- (void)change:(UISegmentedControl *)segmentedControl {
    NSLog(@"%s", __FUNCTION__);
    NSLog(@"%ld", segmentedControl.selectedSegmentIndex);
    //获取分段控制器的某个标题
    NSString *title = [segmentedControl titleForSegmentAtIndex:segmentedControl.selectedSegmentIndex];
    NSLog(@"%@", title);
    textField.text = title;

}

- (void)pressButton {
    NSLog(@"%s", __FUNCTION__);
   UISegmentedControl *control = (UISegmentedControl *)[self.view viewWithTag:100];
   分段控制的分段数
    NSLog(@"%lu", control.numberOfSegments);
    插入一个分段
    [control insertSegmentWithTitle:@"看电影" atIndex:control.numberOfSegments animated:YES];

}

UIImage, 图片类, 继承于NSObject

UIImageView, 继承于UIView, 用于显示图片

  imageView = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"1"]];
    imageView.frame = CGRectMake(0, 0, 500 , 360);
    imageView.center = self.view.center;
    [self.view addSubview:imageView];
    [imageView release];
    播放多张图片
    NSMutableArray *marray = [[NSMutableArray alloc] initWithCapacity:14];
    for (NSInteger i = 1; i <= 14; i++) {
        NSString *name = [NSString stringWithFormat:@"%ld", i];
        UIImage *image = [UIImage imageNamed:name];
        [marray addObject:image];
    }
    动画数组, 数组内存放UIImage
    imageView.animationImages = marray;
    动画时长
    imageView.animationDuration = 1;
    动画重复次数
    imageView.animationRepeatCount = 10;
    //开始动画
    [imageView startAnimating];
    _flag = YES;
    //
//  [imageView stopAnimating];

    UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom];
    button.frame = CGRectMake(135, 20, 100, 40);
    [button setTitle:@"停止" forState:UIControlStateNormal];
    [button setTitleColor:[UIColor whiteColor] forState:UIControlStateNormal];
    button.titleLabel.font = [UIFont systemFontOfSize:20];
    [button addTarget:self action:@selector(stop:) forControlEvents:UIControlEventTouchUpInside];
    [self.view addSubview:button];

}
- (void)stop:(UIButton *)button {
    NSLog(@"%s", __FUNCTION__);
//    if (_flag) {
//        [imageView stopAnimating];
//        _flag = NO;
//    } else {
//        [imageView startAnimating];
//        _flag = YES;
//    }
    if (imageView.isAnimating) {
        [imageView stopAnimating];
        [button setTitle:@"开始" forState:UIControlStateNormal];
    } else {
        [imageView startAnimating];
        [button setTitle:@"停止" forState:UIControlStateNormal];
    }

}

2015-10-22  19:51:07