一、跳转到“设置”

//>=iOS8.0可用

[[UIApplication sharedApplication] openURL:[NSURL URLWithString:UIApplicationOpenSettingsURLString]];

二、跳转到设置的其它位置

1. 首先针对Info.plist添加如下选项

2. 调用跳转代码，如下

//跳转到“About”(关于本机)页面  
NSURL *url = [NSURL URLWithString:@"prefs:root=General&path=About"];  
if ([[UIApplication sharedApplication] canOpenURL:url]) {  
    [[UIApplication sharedApplication] openURL:url];  
} else {  
    NSLog(@"can not open");  
}

三. 附，“设置”中各个页面的“地址”

About — prefs:root=General&path=About
Accessibility — prefs:root=General&path=ACCESSIBILITY
Airplane Mode On — prefs:root=AIRPLANE_MODE
Auto-Lock — prefs:root=General&path=AUTOLOCK
Brightness — prefs:root=Brightness
Bluetooth — prefs:root=General&path=Bluetooth
Date & Time — prefs:root=General&path=DATE_AND_TIME
FaceTime — prefs:root=FACETIME
General — prefs:root=General
Keyboard — prefs:root=General&path=Keyboard
iCloud — prefs:root=CASTLE
iCloud Storage & Backup — prefs:root=CASTLE&path=STORAGE_AND_BACKUP
International — prefs:root=General&path=INTERNATIONAL
Location Services — prefs:root=LOCATION_SERVICES
Music — prefs:root=MUSIC
Music Equalizer — prefs:root=MUSIC&path=EQ
Music Volume Limit — prefs:root=MUSIC&path=VolumeLimit
Network — prefs:root=General&path=Network
Nike + iPod — prefs:root=NIKE_PLUS_IPOD
Notes — prefs:root=NOTES
Notification — prefs:root=NOTIFICATIONS_ID
Phone — prefs:root=Phone
Photos — prefs:root=Photos
Profile — prefs:root=General&path=ManagedConfigurationList
Reset — prefs:root=General&path=Reset
Safari — prefs:root=Safari
Siri — prefs:root=General&path=Assistant
Sounds — prefs:root=Sounds
Software Update — prefs:root=General&path=SOFTWARE_UPDATE_LINK
Store — prefs:root=STORE
Twitter — prefs:root=TWITTER
Usage — prefs:root=General&path=USAGE
VPN — prefs:root=General&path=Network/VPN
Wallpaper — prefs:root=Wallpaper
Wi-Fi — prefs:root=WIFI
Setting —prefs:root=INTERNET_TETHERING

用途

CMPedometeri，iOS8.0及以后系统可以使用，统计某段时间内用户步数，距离信息。

代码实现

引入框架CoreMotion.framework

#import <CoreMotion/CoreMotion.h>  

@property (strong, nonatomic) CMPedometer *pedonmeter;  

_pedonmeter = [[CMPedometer alloc] init];
    if ([CMPedometer isStepCountingAvailable]) {
        [_pedonmeter queryPedometerDataFromDate:[NSDate dateWithTimeIntervalSinceNow:-60*60*24*2] toDate:[NSDate dateWithTimeIntervalSinceNow:-60*60*24*1] withHandler:^(CMPedometerData * _Nullable pedometerData, NSError * _Nullable error) {
            if (error)
            {
                NSLog(@"error===%@",error);
            }
            else {
                NSLog(@"步数===%@",pedometerData.numberOfSteps);
                NSLog(@"距离===%@",pedometerData.distance);
            }
        }];
    }else{
        NSLog(@"不可用===");
    }

错误处理

如果出现以下错误，是因为CMPedometer回调时，对象已经没有了，所以声明为属性就可以了。

Error Domain=CMErrorDomain Code=103 "The operation couldn’t be completed. (CMErrorDomain error 103.)"

Link : CMPedometer（计步器）使用，获取用户行走步数、距离等信息

直接上代码，说明请看注释吧

ViewController.h

#import <UIKit/UIKit.h>

@interface ViewController : UIViewController<UICollectionViewDataSource,UICollectionViewDelegateFlowLayout>{

}
@property (strong, nonatomic)UICollectionView *collectionView;

@end

ViewController.m

#import "ViewController.h"

@interface ViewController ()

@end

@implementation ViewController

- (void)viewDidLoad
{
    [super viewDidLoad];
    
    //确定是水平滚动，还是垂直滚动
    UICollectionViewFlowLayout *flowLayout=[[UICollectionViewFlowLayout alloc] init];
    [flowLayout setScrollDirection:UICollectionViewScrollDirectionVertical];
    
    self.collectionView=[[UICollectionView alloc] initWithFrame:CGRectMake(0, 64, 320, 200) collectionViewLayout:flowLayout];
    self.collectionView.dataSource=self;
    self.collectionView.delegate=self;
    [self.collectionView setBackgroundColor:[UIColor clearColor]];
    
    //注册Cell，必须要有
    [self.collectionView registerClass:[UICollectionViewCell class] forCellWithReuseIdentifier:@"UICollectionViewCell"];
    
    [self.view addSubview:self.collectionView];
}


#pragma mark -- UICollectionViewDataSource

//定义展示的UICollectionViewCell的个数
-(NSInteger)collectionView:(UICollectionView *)collectionView numberOfItemsInSection:(NSInteger)section
{
    return 10;
}

//定义展示的Section的个数
-(NSInteger)numberOfSectionsInCollectionView:(UICollectionView *)collectionView
{
    return 2;
}

//每个UICollectionView展示的内容
-(UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath
{
    static NSString * CellIdentifier = @"UICollectionViewCell";
    UICollectionViewCell * cell = [collectionView dequeueReusableCellWithReuseIdentifier:CellIdentifier forIndexPath:indexPath];
    
    cell.backgroundColor = [UIColor colorWithRed:((10 * indexPath.row) / 255.0) green:((20 * indexPath.row)/255.0) blue:((30 * indexPath.row)/255.0) alpha:1.0f];
    UILabel *label = [[UILabel alloc] initWithFrame:CGRectMake(0, 0, 20, 20)];
    label.textColor = [UIColor redColor];
    label.text = [NSString stringWithFormat:@"%d",indexPath.row];
 
    for (id subView in cell.contentView.subviews) {
        [subView removeFromSuperview];
    }
    [cell.contentView addSubview:label];
    return cell;
}

#pragma mark --UICollectionViewDelegateFlowLayout

//定义每个Item 的大小
- (CGSize)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout*)collectionViewLayout sizeForItemAtIndexPath:(NSIndexPath *)indexPath
{
    return CGSizeMake(60, 60);
}

//定义每个UICollectionView 的 margin
-(UIEdgeInsets)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout *)collectionViewLayout insetForSectionAtIndex:(NSInteger)section
{
    return UIEdgeInsetsMake(5, 5, 5, 5);
}

#pragma mark --UICollectionViewDelegate

//UICollectionView被选中时调用的方法
-(void)collectionView:(UICollectionView *)collectionView didSelectItemAtIndexPath:(NSIndexPath *)indexPath
{
    UICollectionViewCell * cell = (UICollectionViewCell *)[collectionView cellForItemAtIndexPath:indexPath];
    //临时改变个颜色，看好，只是临时改变的。如果要永久改变，可以先改数据源，然后在cellForItemAtIndexPath中控制。（和UITableView差不多吧！O(∩_∩)O~）
    cell.backgroundColor = [UIColor greenColor];
    NSLog(@"item======%d",indexPath.item);
    NSLog(@"row=======%d",indexPath.row);
    NSLog(@"section===%d",indexPath.section);
}

//返回这个UICollectionView是否可以被选择
-(BOOL)collectionView:(UICollectionView *)collectionView shouldSelectItemAtIndexPath:(NSIndexPath *)indexPath
{
    return YES;
}

@end

Link: UICollectionView的使用方法及demo