判斷是否是是全漢字、全字母、全數字、數字和字母等

直接看代碼吧！！！

#pragma mark 判斷只能為中文的
- (BOOL) zsStringInputOnlyIsChinese:(NSString*)string
{
    NSString *regex = @"[\u4e00-\u9fa5]+";
    NSPredicate *pred = [NSPredicate predicateWithFormat:@"SELF MATCHES %@",regex];
    if ([pred evaluateWithObject:string]) {
        return YES;
    }
    return NO;
}


#pragma mark 判斷只能為數字的
- (BOOL) zsStringInputOnlyIsNumber:(NSString*)string
{
    NSString *regex =@"[0-9]*";
    NSPredicate *pred = [NSPredicate predicateWithFormat:@"SELF MATCHES %@",regex];
    if ([pred evaluateWithObject:string]) {
        return YES;
    }
    return NO;
}


#pragma mark 判斷只能為字母的
- (BOOL) zsStringInputOnlyIsLetter:(NSString*)string
{
    NSString *regex =@"[a-zA-Z]*";
    NSPredicate *pred = [NSPredicate predicateWithFormat:@"SELF MATCHES %@",regex];
    if ([pred evaluateWithObject:string]) {
        return YES;
    }
    return NO;
}




#pragma mark 判斷只能為字母或數字的
- (BOOL) zsStringInputOnlyIsNumber:(NSString*)string
{
    NSString *regex =@"[a-zA-Z0-9]*";
    NSPredicate *pred = [NSPredicate predicateWithFormat:@"SELF MATCHES %@",regex];
    if ([pred evaluateWithObject:string]) {
        return YES;
    }
    return NO;
}