iOS代码片段库

【1】键盘遮挡的一种解决方法：
主要实现逻辑: 将需要显示的控件放置在一个单独的UIView中，然后整个view上移处理
代码实现：
+(void)animationView:(UIScrollView *)anmaView activeRect:(CGRect)filedRect
{
    //    CGRect filedRect=filed.frame;
    CGPoint point=anmaView.contentOffset;
    //    计算出距离屏幕上方的相对坐标高度
    float  realDis=filedRect.origin.y-point.y;
    //    计算到目标点的距离的绝对值
    int distance1=0;
    if (iPhone5) {
        distance1=120;
    }else{
        distance1=90;
    }
    float distance=fabsf(realDis-distance1);
    if (realDis>distance1) {
        point.y+=distance;
    }else{
        point.y-=distance;
    }
    [UIView beginAnimations:nil context:nil];
    [UIView setAnimationDuration:0.5];
    anmaView.contentOffset=point;
    [UIView commitAnimations];
}

【2】移动号码验证（网络转载，已验证）
- (BOOL)isMobileNumber:(NSString*)mobileNum
{
    /**
     * 手机号码
     * 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
     */
    NSString* MOBILE= @"^1(3[0-9]|5[0-35-9]|8[025-9])\\d{8}$";
    /**
     * 中国移动：China Mobile
     * 134[0-8],135,136,137,138,139,150,151,157,158,159,182,187,188
     */
    NSString* CM= @"^1(34[0-8]|(3[5-9]|5[017-9]|8[278])\\d)\\d{7}$";
    /**
     * 中国联通：China Unicom
     * 130,131,132,152,155,156,185,186
     */
    NSString* CU= @"^1(3[0-2]|5[256]|8[56])\\d{8}$";
    /**
     * 中国电信：China Telecom
     * 133,1349,153,180,189
     */
    NSString* CT= @"^1((33|53|8[09])[0-9]|349)\\d{7}$";
    /**
     * 大陆地区固话及小灵通
     * 区号：010,020,021,022,023,024,025,027,028,029
     * 号码：七位或八位
     */
    // NSString * PHS = @"^0(10|2[0-5789]|\\d{3})\\d{7,8}$";
   
    NSPredicate *regextestmobile = [NSPredicate predicateWithFormat:@"SELF MATCHES %@",MOBILE];
    NSPredicate *regextestcm = [NSPredicate predicateWithFormat:@"SELF MATCHES %@",CM];
    NSPredicate *regextestcu = [NSPredicate predicateWithFormat:@"SELF MATCHES %@",CU];
    NSPredicate *regextestct = [NSPredicate predicateWithFormat:@"SELF MATCHES %@",CT];
   
    if(([regextestmobile evaluateWithObject:mobileNum] == YES)
       || ([regextestcm evaluateWithObject:mobileNum] == YES)
       || ([regextestct evaluateWithObject:mobileNum] == YES)
       || ([regextestcu evaluateWithObject:mobileNum] == YES))
    {
        return YES;
    }
    else
    {
        return NO;
    }
}


【3】邮箱验证（网络转载，未验证）
-(BOOL)validateEmail:(NSString*)email  
{  
    if((0 != [email rangeOfString:@"@"].length) &&  
         (0 != [email rangeOfString:@"."].length))  
    {  
             
           NSCharacterSet* tmpInvalidCharSet = [[NSCharacterSet alphanumericCharacterSet] invertedSet];  
        NSMutableCharacterSet* tmpInvalidMutableCharSet = [[tmpInvalidCharSet mutableCopy] autorelease];  
        [tmpInvalidMutableCharSet removeCharactersInString:@"_-"];  
         
           //使用compare option 来设定比较规则，如  
           //NSCaseInsensitiveSearch是不区分大小写  
           //NSLiteralSearch 进行完全比较,区分大小写  
           //NSNumericSearch 只比较定符串的个数，而不比较字符串的字面值  
        NSRange range1 = [email rangeOfString:@"@"  
                                              options:NSCaseInsensitiveSearch];  
         
        //取得用户名部分  
        NSString* userNameString = [email substringToIndex:range1.location];  
        NSArray* userNameArray   = [userNameString componentsSeparatedByString:@"."];  
             
        for(NSString* string in userNameArray)  
           {  
            NSRange rangeOfInavlidChars = [string rangeOfCharacterFromSet: tmpInvalidMutableCharSet];  
            if(rangeOfInavlidChars.length != 0 || [string isEqualToString:@""])  
                return NO;  
        }  
         
        NSString *domainString = [email substringFromIndex:range1.location+1];  
        NSArray *domainArray   = [domainString componentsSeparatedByString:@"."];  
         
        for(NSString *string in domainArray)  
           {  
            NSRange rangeOfInavlidChars=[string rangeOfCharacterFromSet:tmpInvalidMutableCharSet];  
            if(rangeOfInavlidChars.length !=0 || [string isEqualToString:@""])  
                return NO;  
        }  
       
        return YES;  
    }  
    else // no ''@'' or ''.'' present  
        return NO;  
}  
   
   
BOOL NSStringIsValidEmail(NSString *checkString)    
{    
    NString *stricterFilterString = @"[A-Z0-9a-z._%+-]+@[A-Za-z0-9.-]+\\.[A-Za-z]{2,4}";  
    NSString *laxString = @".+@.+\.[A-Za-z]{2}[A-Za-z]*";    
    NSString *emailRegex = stricterFilter ? stricterFilterString : laxString;    
    NSPredicate *emailTest = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", emailRegex];    
    return [emailTest evaluateWithObject:checkString];    
}