首先创建StatusBarTool文件
再拷贝下面的代码
此方法用到了私有API（不建议使用）
.h文件代码

#import <UIKit/UIKit.h>
typedef enum {
    NetWorkTypeNone = 0,    //未知网络或没有网络
    NetWorkType2G   = 1,    //2G网络
    NetWorkType3G   = 2,    //3G网络
    NetWorkType4G   = 3,    //4G网络
    NetWorkTypeWiFi = 5,    //WiFi网络
    
} NetWorkType;

@interface StatusBarTool : NSObject

/** 获取当前网络状态 */
+ (NetWorkType)currentNetWorkType;

/** 获取当前网络运营商 */
+ (NSString *)serviceCompany;

/** 获取当前电池电量 */
+ (NSString *)currentBatteryPercent;

/** 获取当前时间 */
+ (NSString *)currentTimeString;

@end

.m文件代码

#import "StatusBarTool.h"

@implementation StatusBarTool

+ (NSString *)currentBatteryPercent
{
    NSArray *infoArray = [[[[UIApplication sharedApplication] valueForKey:@"statusBar"] valueForKey:@"foregroundView"] subviews];
    for (id info in infoArray) {
        if ([info isKindOfClass:NSClassFromString(@"UIStatusBarBatteryPercentItemView")]) {
            NSString *percentString = [info valueForKey:@"percentString"];
            NSLog(@"电量为： %@",percentString);
            return percentString;
        }
    }
    return @"";
}

+ (NetWorkType)currentNetWorkType
{
    NSArray *infoArray = [[[[UIApplication sharedApplication] valueForKey:@"statusBar"] valueForKey:@"foregroundView"] subviews];
    NetWorkType type;
    for (id info in infoArray) {
        if ([info isKindOfClass:NSClassFromString(@"UIStatusBarDataNetworkItemView")]) {
            type = [[info valueForKey:@"dataNetworkType"] intValue];
            NSLog(@"网络状态： %d",type);
            return type;
        }
    }
    return NetWorkTypeNone;
}

+ (NSString *)currentTimeString
{
    NSArray *infoArray = [[[[UIApplication sharedApplication] valueForKey:@"statusBar"] valueForKey:@"foregroundView"] subviews];
    
    for (id info in infoArray) {
        if ([info isKindOfClass:NSClassFromString(@"UIStatusBarTimeItemView")]) {
            NSString *timeString = [info valueForKey:@"timeString"];
            NSLog(@"当前时间为：%@",timeString);
            return timeString;
        }
        
    }
    return @"";
}

+ (NSString *)serviceCompany
{
    NSArray *infoArray = [[[[UIApplication sharedApplication] valueForKey:@"statusBar"] valueForKey:@"foregroundView"] subviews];
    
    for (id info in infoArray) {
        if ([info isKindOfClass:NSClassFromString(@"UIStatusBarServiceItemView")]) {
            NSString *serviceString = [info valueForKey:@"serviceString"];
            NSLog(@"运营商：%@",serviceString);
            return serviceString;
        }
    }
    return @"";
}

@end