json格式字符串转字典：

+ (NSDictionary *)dictionaryWithJsonString:(NSString *)jsonString {
    if (jsonString == nil) {
        return nil;
    }
    NSData *jsonData = [jsonString dataUsingEncoding:NSUTF8StringEncoding];
    NSError *err;
    NSDictionary *dic = [NSJSONSerialization JSONObjectWithData:jsonData options:NSJSONReadingMutableContainers error:&err];
    if(err) {
        NSLog(@"json解析失败：%@",err);
        return nil;
    }
    return dic;

}

AFNetworking 获取httpCode非200情况下的返回值

 [CBXNetworking postWithUrl:@" " refreshCache:NO params:params success:^(id response) {
        NSLog(@"response--> %@",response);
    } fail:^(NSURLSessionDataTask *task, NSError *error) {
        //  这里是关键部分======
        NSHTTPURLResponse *response = (NSHTTPURLResponse*)task.response;
        //通讯协议状态码 一般401，400啥的
        NSInteger statusCode = response.statusCode;
        //服务器返回的业务逻辑报文信息
        NSString* errResponse = [[NSString alloc] initWithData:(NSData *)error.userInfo[AFNetworkingOperationFailingURLResponseDataErrorKey] encoding:NSUTF8StringEncoding];
        // json字符串转字典
        NSDictionary *json = [self dictionaryWithJson_String:errResponse];
        NSLog(@"json-->%@",json);
    }];

UIview切圆角

- (void)setPartRoundWithView:(UIView *)view rect:(CGRect)rect corners:(UIRectCorner)corners cornerRadius:(float)cornerRadius {
    CAShapeLayer *shapeLayer = [CAShapeLayer layer];
    shapeLayer.path = [UIBezierPath bezierPathWithRoundedRect:rect byRoundingCorners:corners cornerRadii:CGSizeMake(cornerRadius, cornerRadius)].CGPath;
    view.layer.mask = shapeLayer;
}

获取当前时间

+(NSDateComponents *)GetCurrentDate{
    NSCalendar *gregorian = [[NSCalendar alloc]
                             initWithCalendarIdentifier:NSCalendarIdentifierGregorian];
    // 获取当前日期
    NSDate* dt = [NSDate date];
    // 定义一个时间字段的旗标，指定将会获取指定年、月、日、时、分、秒的信息
    unsigned unitFlags = NSCalendarUnitYear |
    NSCalendarUnitMonth |  NSCalendarUnitDay |
    NSCalendarUnitHour |  NSCalendarUnitMinute |
    NSCalendarUnitSecond | NSCalendarUnitWeekday;
    // 获取不同时间字段的信息
    NSDateComponents* comp = [gregorian components: unitFlags fromDate:dt];
    // 获取各时间字段的数值
    /*
    NSLog(@"现在是%ld年" , comp.year);
    NSLog(@"现在是%ld月 " , comp.month);
    NSLog(@"现在是%ld日" , comp.day);
    NSLog(@"现在是%ld时" , comp.hour);
    NSLog(@"现在是%ld分" , comp.minute);
    NSLog(@"现在是%ld秒" , comp.second);
    NSLog(@"现在是星期%ld" , comp.weekday);
     */
    return comp;
}

判断电话号码

+(BOOL)checkPhoneNumber:(NSString *)phone

{
    
    /**
     * 移动：134[0-8],135,136,137,138,139,150,151,157,158,159,182,187,188
     * 联通：130,131,132,152,155,156,185,186
     * 电信：133,1349,153,180,189,181(增加)
     */
    NSString * MOBIL = @"^1(3[0-9]|5[0-35-9]|8[025-9])\\d{8}$";
    NSString * CM = @"^1(34[0-8]|(3[5-9]|5[017-9]|8[2378])\\d)\\d{7}$";
    NSString * CU = @"^1(3[0-2]|5[256]|8[56]|7[6])\\d{8}$";
    NSString * CT = @"^1((33|53|8[019])[0-9]|349)\\d{7}$";
    NSPredicate *regextestmobile = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", MOBIL];
    NSPredicate *regextestcm = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", CM];
    NSPredicate *regextestcu = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", CU];
    NSPredicate *regextestct = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", CT];
    
    if (([regextestmobile evaluateWithObject:phone]
         || [regextestcm evaluateWithObject:phone]
         || [regextestct evaluateWithObject:phone]
         || [regextestcu evaluateWithObject:phone])) {
        NSLog(@"手机号验证可用");
        return YES;
    }else{
        return NO;
    }
    return NO;
    
}

判断邮箱

+(BOOL)checkEmail:(NSString *)email{
    NSString *emailRegex = @"[A-Z0-9a-z._%+-]+@[A-Za-z0-9.-]+\\.[A-Za-z]{2,4}";
    NSPredicate *emailTest = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", emailRegex];
    if( [emailTest evaluateWithObject:email]){
        
        NSLog(@"恭喜！您输入的邮箱验证合法");
        return YES;
        
    }else{
        
        
        return NO;
    }
    return NO;
}

去除字符串中前后空格

+(NSString *)removeSpaceAndNewline:(NSString *)str{
    NSString *temp = [str stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceCharacterSet]];
    
    
    NSString *text = [temp stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet ]];
    return text;
}

改变label行间距

+ (void)changeLineSpaceForLabel:(UILabel *)label WithSpace:(float)space {
    
    NSString *labelText = label.text;
    NSMutableAttributedString *attributedString = [[NSMutableAttributedString alloc] initWithString:labelText];
    NSMutableParagraphStyle *paragraphStyle = [[NSMutableParagraphStyle alloc] init];
    [paragraphStyle setLineSpacing:space];
    [attributedString addAttribute:NSParagraphStyleAttributeName value:paragraphStyle range:NSMakeRange(0, [labelText length])];
    label.attributedText = attributedString;
    [label sizeToFit];
    
}

检测手机是否安装 QQ 微信 微博

 if ([QQApiInterface isQQInstalled]) {
            NSLog(@"安装了QQ");
            return YES;
  }else{
            NSLog(@"mei安装QQ");
             return NO;
 }
 if ([WXApi isWXAppInstalled]) {
            NSLog(@"安装了wechat");
            return YES;  
 }else{
            NSLog(@"mei安装wechat");
            return NO;
 }
 if ([WeiboSDK isWeiboAppInstalled]) {
            NSLog(@"安装了微博");
            return YES;
 }else{
             NSLog(@"mei安装微博");
             return NO;
 }

生成uuid

+ (NSString *)uuidString
{
    CFUUIDRef uuid_ref = CFUUIDCreate(NULL);
    CFStringRef uuid_string_ref= CFUUIDCreateString(NULL, uuid_ref);
    NSString *uuid = [NSString stringWithString:(__bridge NSString *)uuid_string_ref];
    CFRelease(uuid_ref);
    CFRelease(uuid_string_ref);
    return [uuid lowercaseString];
}

字典转json串

+ (NSString*)dictionaryToJson:(NSDictionary *)dic

{
    
    NSError *parseError = nil;
    
    NSData *jsonData = [NSJSONSerialization dataWithJSONObject:dic options:NSJSONWritingPrettyPrinted error:&parseError];
    
    return [[NSString alloc] initWithData:jsonData encoding:NSUTF8StringEncoding];
    
}

压缩图片

+(UIImage *)scaleToSize:(UIImage *)img size:(CGSize)size{
    // 创建一个bitmap的context
    // 并把它设置成为当前正在使用的context
    UIGraphicsBeginImageContext(size);
    // 绘制改变大小的图片
    [img drawInRect:CGRectMake(0, 0, size.width, size.height)];
    // 从当前context中创建一个改变大小后的图片
    UIImage* scaledImage = UIGraphicsGetImageFromCurrentImageContext();
    // 使当前的context出堆栈
    UIGraphicsEndImageContext();
    // 返回新的改变大小后的图片
    return scaledImage;
}

获取当前网络

+(NSString *)getNetWorkStates{
    UIApplication *app = [UIApplication sharedApplication];
    NSArray *children = [[[app valueForKeyPath:@"statusBar"]valueForKeyPath:@"foregroundView"]subviews];
    NSString *state = [[NSString alloc]init];
    int netType = 0;
    //获取到网络返回码
    for (id child in children) {
        if ([child isKindOfClass:NSClassFromString(@"UIStatusBarDataNetworkItemView")]) {
            //获取到状态栏
            netType = [[child valueForKeyPath:@"dataNetworkType"]intValue];
            
            switch (netType) {
                case 0:
                    state = @"无网络";
                    //无网模式
                    break;
                case 1:
                    state = @"2G";
                    break;
                case 2:
                    state = @"3G";
                    break;
                case 3:
                    state = @"4G";
                    break;
                case 5:
                {
                    state = @"Wifi";
                }
                    break;
                default:
                    break;
            }
        }
    }
    //根据状态选择
    return state;
}

给字符串每三位加逗号(金钱)

+(NSString *)hanleNums:(NSString *)numbers{
    NSString *str = [numbers substringWithRange:NSMakeRange(numbers.length%3, numbers.length-numbers.length%3)];
    NSString *strs = [numbers substringWithRange:NSMakeRange(0, numbers.length%3)];
    for (int  i =0; i < str.length; i =i+3) {
        NSString *sss = [str substringWithRange:NSMakeRange(i, 3)];
        strs = [strs stringByAppendingString:[NSString stringWithFormat:@",%@",sss]];
    }
    if ([[strs substringWithRange:NSMakeRange(0, 1)] isEqualToString:@","]) {
        strs = [strs substringWithRange:NSMakeRange(1, strs.length-1)];
    }
    return strs;
}