滑动条和进度条，滑动条是主动的，进度条是被动的。

#import <UIKit/UIKit.h>

@interface ViewController : UIViewController

{
    // 进度条
    UIProgressView* _uiProgressView;
    
    // 滑动条
    UISlider* _uiSlider;
}

@property (retain, nonatomic) UISlider* uiSlider;
@property (retain, nonatomic) UIProgressView* uiProgressView;

@end

#import "ViewController.h"

@interface ViewController ()

@end

@implementation ViewController

@synthesize uiProgressView = _uiProgressView;
@synthesize uiSlider = _uiSlider;

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.
    
    _uiProgressView = [[UIProgressView alloc] init];
    
    // 进度条只有高度不能改变
    _uiProgressView.frame = CGRectMake(90, 100, 200, 40);
    
    // 范围 0 ~ 1
    _uiProgressView.progress = 0.5;
    
    // 进度的颜色
    [_uiProgressView setTintColor:[UIColor redColor]];
    _uiProgressView.progressTintColor = [UIColor greenColor];
    
    // 整体进度的颜色
    [_uiProgressView setTrackTintColor:[UIColor yellowColor]];
    
    // 设置进度条风格
    _uiProgressView.progressViewStyle = UIProgressViewStyleDefault;
    
    [self.view addSubview:_uiProgressView];
    
    
    _uiSlider = [[UISlider alloc] init];
    _uiSlider.frame = CGRectMake(50, 200, 200, 40);
    _uiSlider.maximumValue = 100;
    _uiSlider.minimumValue = -100;
    _uiSlider.value = 0;
    
    // 滑块左侧的颜色
    _uiSlider.minimumTrackTintColor = [UIColor grayColor];
    
    // 滑块右侧的颜色
    _uiSlider.maximumTrackTintColor = [UIColor redColor];
    
    // 滑块的颜色
    _uiSlider.thumbTintColor = [UIColor orangeColor];
    
    [_uiSlider addTarget:self action:@selector(slideValue) forControlEvents:UIControlEventValueChanged];
    
    [self.view addSubview:_uiSlider];
}

- (void) slideValue {
    NSLog(@"value = %f", _uiSlider.value);
    _uiProgressView.progress = (_uiSlider.value + 100) / 200;
}

- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

@end