UISegmentedControl UISlider，uisegmentedcontrol

UISegmentedControl UISlider，uisegmentedcontrol

    self.view.backgroundColor = [UIColor whiteColor];    //UISegmentedControl 是iOS中的分段控制項,其實是多個button的複合檢視,通過切換不同的segment(嚴格來說,點擊不同的button),響應不同的操作.    NSArray *titles = @[@"輕拍", @"長按",@"輕掃",@"平移"];    UISegmentedControl *segmentControl = [[UISegmentedControl alloc] initWithItems:titles];//    //設定預設選中的分段    segmentControl.selectedSegmentIndex  = 0;    segmentControl.frame = CGRectMake(10, 40, 300, 30);//    //給segmentedControl添加響應事件    [segmentControl addTarget:self action:@selector(handleSegmentControl:) forControlEvents:UIControlEventValueChanged];    [self.view addSubview:segmentControl];    [segmentControl release];        UIView *view = [[UIView alloc] initWithFrame:CGRectMake(100, 100, 100, 100)];    view.backgroundColor = [UIColor blackColor];    view.tag = 200;    [self.view addSubview:view];    [view release];

    //UISlider 滑塊控制項,比如控制音量,以及控制視頻播放進度的滑杆.    //滑竿上有一系列的值,代表了一個值的範圍,滑動滑竿,根據滑竿的值做出相應的改變.    UISlider *slider = [[UISlider alloc] initWithFrame:CGRectMake(30, 60, 200, 30)];    //設定滑竿的最大值    slider.maximumValue = 1.0;    //設定滑竿的最小值    slider.minimumValue = 0.0;    //給slider添加響應事件    [slider addTarget:self action:@selector(handleSlider:) forControlEvents:UIControlEventValueChanged];    [self.view addSubview:slider];    [slider release];    //代碼截屏    //(1)設定要截屏的圖片大小    UIGraphicsBeginImageContext(self.view.frame.size);    //(2)對哪個視圖固定大小的圖片    [self.view.layer renderInContext:UIGraphicsGetCurrentContext()];//    //(3)擷取的圖片對象    UIImage *image = UIGraphicsGetImageFromCurrentImageContext();//    //(4)結束繪製圖片    UIGraphicsEndImageContext();//    //(5)儲存到相簿    UIImageWriteToSavedPhotosAlbum(image, nil, nil, nil);