IOS_學習筆記（Slider）

快速學習 Slider＿滑桿運用：

這個是簡單的一個畫面的內容，所以首先我要知道我們需要建立什麼

需要 3 slider 與原本的ViewController；有了這兩樣東西，
要讓視圖與控制器說話，所以要建立三個 IBAction ，告訴他說被改變了
要讓控制器與視圖說話，所以要建立三個IBOutlet，告訴他要改什麼

程式碼內容：

@interface ViewController ()

@property (weak, nonatomic) IBOutlet UISlider *radSlider;

@property (weak, nonatomic) IBOutlet UISlider *greenSlider;

@property (weak, nonatomic) IBOutlet UISlider *blueSlider;

@end

@implementation ViewController

- (void)viewDidLoad {

    [super viewDidLoad];

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

}

- (IBAction)rad:(id)sender {

    [self background];

}

- (IBAction)green:(id)sender {

    [self background];

}

- (IBAction)blue:(id)sender {

    [self background];

}

-(void)background{

    //拿到三個顏色

    CGFloat  rad = self.radSlider.value;

    CGFloat green =self.greenSlider.value;

    CGFloat blue = self.blueSlider.value;

    UIColor * color = [UIColor colorWithRed:rad/255.0 green:green/255.0 blue:blue/255.0 alpha:1.0];

    self.view.backgroundColor = color;

}

- (void)didReceiveMemoryWarning {

    [super didReceiveMemoryWarning];

    // Dispose of any resources that can be recreated.

}

@end