iOS AngelClient(38032,0x10a15534

AngelClient(38032,0x10a155340) malloc: *** error for object 0x600000016d40: Invalid pointer dequeued from free list
*** set a breakpoint in malloc_error_break to debug
给byte数组不足位补零操作，然后报上述错误

#pragma mark  - 字符串转为长度为length的data，不足位自动补零
+(NSData *)stringToData:(NSString *)string length:(NSUInteger)length{
    NSStringEncoding enc =  CFStringConvertEncodingToNSStringEncoding(kCFStringEncodingUTF8); ;
    NSData *data = [string dataUsingEncoding:enc];
    Byte *byte = (Byte *)[data bytes];
//错误写法
    for (int i = (int)data.length; i < length; i++) {
        byte[i] = 0;
    }
   
    NSData * data16 = [[NSData alloc] initWithBytesNoCopy:byte length:length deallocator:^(void * _Nonnull bytes, NSUInteger length) {
        
    }];
    return data16;

}

正确的写法是

#pragma mark  - 字符串转为长度为length的data，不足位自动补零
+(NSData *)stringToData:(NSString *)string length:(NSUInteger)length{
    NSStringEncoding enc =  CFStringConvertEncodingToNSStringEncoding(kCFStringEncodingUTF8); ;
    NSData *data = [string dataUsingEncoding:enc];
    Byte *byte = (Byte *)[data bytes];
    //先开辟空间，然后重新给byte赋值
    NSData * data16 = [[NSData alloc] initWithBytes:byte length:length];
    Byte *byte1 = (Byte *)[data16 bytes];
        for (int i = (int)data.length; i < length; i++) {
            byte1[i] = 0;
        }

    return data16;
}